Merge branch 'master' into master

.travis.yml

@@ -1,9 +1,13 @@
 language: java
 
-install: travis_wait 60 mvn -q test
+before_install: 
+  - export MAVEN_OPTS="-Xmx2048M -Xss128M -XX:+CMSClassUnloadingEnabled -XX:+UseG1GC -XX:-UseGCOverheadLimit"
+  - echo "MAVEN_OPTS='-Xmx2048M -Xss128M -XX:+CMSClassUnloadingEnabled -XX:+UseG1GC -XX:-UseGCOverheadLimit'" > ~/.mavenrc
+
+install: travis_wait 60 mvn -q test -fae
 
 before_script:
-  - echo "MAVEN_OPTS='-Xmx2048M -Xss128M -XX:MaxPermSize=2048M -XX:+CMSClassUnloadingEnabled -XX:+UseConcMarkSweepGC -XX:+TieredCompilation -XX:TieredStopAtLevel=1 -XX:-UseGCOverheadLimit'" > ~/.mavenrc
+  - echo "MAVEN_OPTS='-Xmx2048M -Xss128M -XX:+CMSClassUnloadingEnabled -XX:+UseG1GC -XX:-UseGCOverheadLimit'" > ~/.mavenrc
 
 jdk:
   - oraclejdk8

JGit/pom.xml

@@ -6,6 +6,13 @@
     <version>1.0-SNAPSHOT</version>
     <packaging>jar</packaging>
     <url>http://maven.apache.org</url>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+     </parent>
+         
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>1.8</maven.compiler.source>
@@ -40,24 +47,5 @@
 		<artifactId>slf4j-simple</artifactId>
 		<version>1.7.21</version>
 	</dependency>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <version>4.12</version>
-      <scope>test</scope>
-    </dependency>
   </dependencies>
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.2</version>
-        <configuration>
-          <source>1.7</source>
-          <target>1.7</target>
-        </configuration>
-      </plugin>
-    </plugins>
-  </build>
 </project>

JGit/src/test/java/com/baeldung/jgit/JGitBugIntegrationTest.java

@@ -11,7 +11,7 @@ import static org.junit.Assert.assertNotNull;
 /**
  * Tests which show issues with JGit that we reported upstream.
  */
-public class JGitBugTest {
+public class JGitBugIntegrationTest {
     @Test
     public void testRevWalkDisposeClosesReader() throws IOException {
         try (Repository repo = Helper.openJGitRepository()) {

JGit/src/test/java/com/baeldung/jgit/porcelain/PorcelainUnitTest.java

@@ -2,7 +2,7 @@ package com.baeldung.jgit.porcelain;
 
 import org.junit.Test;
 
-public class PorcelainTest {
+public class PorcelainUnitTest {
     @Test
     public void runSamples() throws Exception {
         // simply call all the samples to see any severe problems with the samples

Twitter4J/pom.xml

@@ -8,12 +8,16 @@
   <name>Twitter4J</name>
   <url>http://maven.apache.org</url>
     
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+     </parent>
+         
 	<properties>
 	    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 	    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 	    <java.version>1.8</java.version>
-	    <maven.compiler.source>1.8</maven.compiler.source>
-		<maven.compiler.target>1.8</maven.compiler.target>
 	</properties>
 
     <dependencies>
@@ -22,11 +26,6 @@
     		<artifactId>twitter4j-stream</artifactId>
     		<version>4.0.6</version>
 		</dependency>
-		<dependency>
-		    <groupId>junit</groupId>
-		    <artifactId>junit</artifactId>
-		    <version>4.12</version>
-		</dependency>
     </dependencies>
     
     <build>
@@ -40,7 +39,7 @@
       		<plugin>
         		<groupId>org.apache.maven.plugins</groupId>
         		<artifactId>maven-surefire-plugin</artifactId>
-        		<version>2.19.1</version>
+        		<version>${maven-surefire-plugin.version}</version>
         		<configuration>
           			<excludes>
             			<exclude>**/ApplicationTest.java</exclude>

Twitter4J/src/test/java/com/baeldung/ApplicationIntegrationTest.java

@@ -9,7 +9,7 @@ import org.junit.Test;
 
 import twitter4j.TwitterException;
 
-public class ApplicationTest {
+public class ApplicationIntegrationTest {
 
 	/**
 	 * In order run this jUnit test you need to configure your API details in the twitter4j.properties

algorithms/pom.xml

@@ -1,81 +1,69 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-	<modelVersion>4.0.0</modelVersion>
-	<groupId>com.baeldung</groupId>
-	<artifactId>algorithms</artifactId>
-	<version>0.0.1-SNAPSHOT</version>
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung</groupId>
+    <artifactId>algorithms</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
 
-	<properties>
-		<junit.version>4.12</junit.version>
-		<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
-		<exec-maven-plugin.version>1.5.0</exec-maven-plugin.version>
-		<lombok.version>1.16.12</lombok.version>
-		<commons-math3.version>3.6.1</commons-math3.version>
-	</properties>
+    <properties>
+        <exec-maven-plugin.version>1.5.0</exec-maven-plugin.version>
+        <lombok.version>1.16.12</lombok.version>
+        <commons-math3.version>3.6.1</commons-math3.version>
+    </properties>
 
-	<dependencies>
-		<dependency>
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-math3</artifactId>
             <version>${commons-math3.version}</version>
         </dependency>
-		<dependency>
-			<groupId>junit</groupId>
-			<artifactId>junit</artifactId>
-			<version>${junit.version}</version>
-			<scope>test</scope>
-		</dependency>
-		<dependency>
+        <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
             <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
-   	 		<groupId>io.jenetics</groupId>
-    		<artifactId>jenetics</artifactId>
-    		<version>3.7.0</version>
-		</dependency>
-	</dependencies>
+            <groupId>io.jenetics</groupId>
+            <artifactId>jenetics</artifactId>
+            <version>3.7.0</version>
+        </dependency>
+    </dependencies>
 
-	<build>
-		<defaultGoal>install</defaultGoal>
-		<pluginManagement>
-			<plugins>
-				<plugin>
-					<groupId>org.apache.maven.plugins</groupId>
-					<artifactId>maven-compiler-plugin</artifactId>
-					<version>${maven-compiler-plugin.version}</version>
-					<configuration>
-						<source>1.8</source>
-						<target>1.8</target>
-					</configuration>
-				</plugin>
-				<plugin>
-					<groupId>org.codehaus.mojo</groupId>
-					<artifactId>exec-maven-plugin</artifactId>
-					<version>${exec-maven-plugin.version}</version>
-				</plugin>
-			</plugins>
-		</pluginManagement>
-	</build>
-	<reporting>
-		<plugins>
-			<plugin>
-				<groupId>org.codehaus.mojo</groupId>
-				<artifactId>cobertura-maven-plugin</artifactId>
-				<version>2.7</version>
-				<configuration>
-					<instrumentation>
-						<ignores>
-							<ignore>com/baeldung/algorithms/dijkstra/*</ignore>
-						</ignores>
-						<excludes>
-							<exclude>com/baeldung/algorithms/dijkstra/*</exclude>
-						</excludes>
-					</instrumentation>
-				</configuration>
-			</plugin>
-		</plugins>
-	</reporting>
+    <build>
+        <pluginManagement>
+            <plugins>
+                <plugin>
+                    <groupId>org.codehaus.mojo</groupId>
+                    <artifactId>exec-maven-plugin</artifactId>
+                    <version>${exec-maven-plugin.version}</version>
+                </plugin>
+            </plugins>
+        </pluginManagement>
+    </build>
+    <reporting>
+        <plugins>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>cobertura-maven-plugin</artifactId>
+                <version>2.7</version>
+                <configuration>
+                    <instrumentation>
+                        <ignores>
+                            <ignore>com/baeldung/algorithms/dijkstra/*</ignore>
+                        </ignores>
+                        <excludes>
+                            <exclude>com/baeldung/algorithms/dijkstra/*</exclude>
+                        </excludes>
+                    </instrumentation>
+                </configuration>
+            </plugin>
+        </plugins>
+    </reporting>
 </project>

algorithms/src/test/java/algorithms/AntColonyOptimizationLongRunningUnitTest.java

@@ -0,0 +1,22 @@
+package algorithms;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import com.baeldung.algorithms.ga.ant_colony.AntColonyOptimization;
+
+public class AntColonyOptimizationLongRunningUnitTest {
+
+    @Test
+    public void testGenerateRandomMatrix() {
+        AntColonyOptimization antTSP = new AntColonyOptimization(5);
+        Assert.assertNotNull(antTSP.generateRandomMatrix(5));
+    }
+
+    @Test
+    public void testStartAntOptimization() {
+        AntColonyOptimization antTSP = new AntColonyOptimization(5);
+        Assert.assertNotNull(antTSP.solve());
+    }
+
+}

algorithms/src/test/java/algorithms/AntColonyOptimizationTest.java

@@ -1,22 +0,0 @@
-package algorithms;
-
-import org.junit.Assert;
-import org.junit.Test;
-
-import com.baeldung.algorithms.ga.ant_colony.AntColonyOptimization;
-
-public class AntColonyOptimizationTest {
-
-	@Test
-	public void testGenerateRandomMatrix() {
-		AntColonyOptimization antTSP = new AntColonyOptimization(5);
-		Assert.assertNotNull(antTSP.generateRandomMatrix(5));
-	}
-
-	@Test
-	public void testStartAntOptimization() {
-		AntColonyOptimization antTSP = new AntColonyOptimization(5);
-		Assert.assertNotNull(antTSP.solve());
-	}
-
-}

algorithms/src/test/java/algorithms/BinaryGeneticAlgorithmLongRunningUnitTest.java

@@ -0,0 +1,16 @@
+package algorithms;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import com.baeldung.algorithms.ga.binary.SimpleGeneticAlgorithm;
+
+public class BinaryGeneticAlgorithmLongRunningUnitTest {
+
+    @Test
+    public void testGA() {
+        SimpleGeneticAlgorithm ga = new SimpleGeneticAlgorithm();
+        Assert.assertTrue(ga.runAlgorithm(50, "1011000100000100010000100000100111001000000100000100000000001111"));
+    }
+
+}

algorithms/src/test/java/algorithms/BinaryGeneticAlgorithmUnitTest.java

@@ -1,16 +0,0 @@
-package algorithms;
-
-import org.junit.Assert;
-import org.junit.Test;
-
-import com.baeldung.algorithms.ga.binary.SimpleGeneticAlgorithm;
-
-public class BinaryGeneticAlgorithmUnitTest {
-
-	@Test
-	public void testGA() {
-		SimpleGeneticAlgorithm ga = new SimpleGeneticAlgorithm();
-		Assert.assertTrue(ga.runAlgorithm(50, "1011000100000100010000100000100111001000000100000100000000001111"));
-	}
-
-}

algorithms/src/test/java/algorithms/DijkstraAlgorithmLongRunningUnitTest.java

@@ -1,76 +1,86 @@
-package algorithms;
-
-import org.junit.Test;
-
-import com.baeldung.algorithms.ga.dijkstra.Dijkstra;
-import com.baeldung.algorithms.ga.dijkstra.Graph;
-import com.baeldung.algorithms.ga.dijkstra.Node;
-
-import java.util.Arrays;
-import java.util.List;
-
-import static org.junit.Assert.assertTrue;
-
-public class DijkstraAlgorithmTest {
-
-    @Test
-    public void whenSPPSolved_thenCorrect() {
-
-        Node nodeA = new Node("A");
-        Node nodeB = new Node("B");
-        Node nodeC = new Node("C");
-        Node nodeD = new Node("D");
-        Node nodeE = new Node("E");
-        Node nodeF = new Node("F");
-
-        nodeA.addDestination(nodeB, 10);
-        nodeA.addDestination(nodeC, 15);
-
-        nodeB.addDestination(nodeD, 12);
-        nodeB.addDestination(nodeF, 15);
-
-        nodeC.addDestination(nodeE, 10);
-
-        nodeD.addDestination(nodeE, 2);
-        nodeD.addDestination(nodeF, 1);
-
-        nodeF.addDestination(nodeE, 5);
-
-        Graph graph = new Graph();
-
-        graph.addNode(nodeA);
-        graph.addNode(nodeB);
-        graph.addNode(nodeC);
-        graph.addNode(nodeD);
-        graph.addNode(nodeE);
-        graph.addNode(nodeF);
-
-        graph = Dijkstra.calculateShortestPathFromSource(graph, nodeA);
-
-        List<Node> shortestPathForNodeB = Arrays.asList(nodeA);
-        List<Node> shortestPathForNodeC = Arrays.asList(nodeA);
-        List<Node> shortestPathForNodeD = Arrays.asList(nodeA, nodeB);
-        List<Node> shortestPathForNodeE = Arrays.asList(nodeA, nodeB, nodeD);
-        List<Node> shortestPathForNodeF = Arrays.asList(nodeA, nodeB, nodeD);
-
-        for (Node node : graph.getNodes()) {
-            switch (node.getName()) {
-            case "B":
-                assertTrue(node.getShortestPath().equals(shortestPathForNodeB));
-                break;
-            case "C":
-                assertTrue(node.getShortestPath().equals(shortestPathForNodeC));
-                break;
-            case "D":
-                assertTrue(node.getShortestPath().equals(shortestPathForNodeD));
-                break;
-            case "E":
-                assertTrue(node.getShortestPath().equals(shortestPathForNodeE));
-                break;
-            case "F":
-                assertTrue(node.getShortestPath().equals(shortestPathForNodeF));
-                break;
-            }
-        }
-    }
-}
+package algorithms;
+
+import org.junit.Test;
+
+import com.baeldung.algorithms.ga.dijkstra.Dijkstra;
+import com.baeldung.algorithms.ga.dijkstra.Graph;
+import com.baeldung.algorithms.ga.dijkstra.Node;
+
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.Assert.assertTrue;
+
+public class DijkstraAlgorithmLongRunningUnitTest {
+
+    @Test
+    public void whenSPPSolved_thenCorrect() {
+
+        Node nodeA = new Node("A");
+        Node nodeB = new Node("B");
+        Node nodeC = new Node("C");
+        Node nodeD = new Node("D");
+        Node nodeE = new Node("E");
+        Node nodeF = new Node("F");
+
+        nodeA.addDestination(nodeB, 10);
+        nodeA.addDestination(nodeC, 15);
+
+        nodeB.addDestination(nodeD, 12);
+        nodeB.addDestination(nodeF, 15);
+
+        nodeC.addDestination(nodeE, 10);
+
+        nodeD.addDestination(nodeE, 2);
+        nodeD.addDestination(nodeF, 1);
+
+        nodeF.addDestination(nodeE, 5);
+
+        Graph graph = new Graph();
+
+        graph.addNode(nodeA);
+        graph.addNode(nodeB);
+        graph.addNode(nodeC);
+        graph.addNode(nodeD);
+        graph.addNode(nodeE);
+        graph.addNode(nodeF);
+
+        graph = Dijkstra.calculateShortestPathFromSource(graph, nodeA);
+
+        List<Node> shortestPathForNodeB = Arrays.asList(nodeA);
+        List<Node> shortestPathForNodeC = Arrays.asList(nodeA);
+        List<Node> shortestPathForNodeD = Arrays.asList(nodeA, nodeB);
+        List<Node> shortestPathForNodeE = Arrays.asList(nodeA, nodeB, nodeD);
+        List<Node> shortestPathForNodeF = Arrays.asList(nodeA, nodeB, nodeD);
+
+        for (Node node : graph.getNodes()) {
+            switch (node.getName()) {
+            case "B":
+                assertTrue(node
+                  .getShortestPath()
+                  .equals(shortestPathForNodeB));
+                break;
+            case "C":
+                assertTrue(node
+                  .getShortestPath()
+                  .equals(shortestPathForNodeC));
+                break;
+            case "D":
+                assertTrue(node
+                  .getShortestPath()
+                  .equals(shortestPathForNodeD));
+                break;
+            case "E":
+                assertTrue(node
+                  .getShortestPath()
+                  .equals(shortestPathForNodeE));
+                break;
+            case "F":
+                assertTrue(node
+                  .getShortestPath()
+                  .equals(shortestPathForNodeF));
+                break;
+            }
+        }
+    }
+}

algorithms/src/test/java/algorithms/RtFiniteStateMachineLongRunningUnitTest.java

@@ -1,38 +1,37 @@
 package algorithms;
 
-import static org.junit.Assert.*;
-import org.junit.Test;
 import com.baeldung.automata.*;
+import org.junit.Test;
 
-/**
- * Tests for {@link RtFiniteStateMachine}
- */
-public final class RtFiniteStateMachineTest {
+import static org.junit.Assert.assertTrue;
+
+public final class RtFiniteStateMachineLongRunningUnitTest {
 
     @Test
     public void acceptsSimplePair() {
         String json = "{\"key\":\"value\"}";
         FiniteStateMachine machine = this.buildJsonStateMachine();
-        for (int i=0;i<json.length();i++) {
+        for (int i = 0; i < json.length(); i++) {
             machine = machine.switchState(String.valueOf(json.charAt(i)));
         }
         assertTrue(machine.canStop());
     }
+
     @Test
     public void acceptsMorePairs() {
         String json = "{\"key1\":\"value1\",\"key2\":\"value2\"}";
         FiniteStateMachine machine = this.buildJsonStateMachine();
-        for (int i=0;i<json.length();i++) {
+        for (int i = 0; i < json.length(); i++) {
             machine = machine.switchState(String.valueOf(json.charAt(i)));
         }
         assertTrue(machine.canStop());
     }
-    
+
     @Test(expected = IllegalArgumentException.class)
     public void missingColon() {
         String json = "{\"key\"\"value\"}";
         FiniteStateMachine machine = this.buildJsonStateMachine();
-        for (int i=0;i<json.length();i++) {
+        for (int i = 0; i < json.length(); i++) {
             machine = machine.switchState(String.valueOf(json.charAt(i)));
         }
     }
@@ -56,20 +55,12 @@ public final class RtFiniteStateMachineTest {
         second.with(new RtTransition("\"", third));
         //Add transitions with chars 0-9 and a-z
         for (int i = 0; i < 26; i++) {
-            if(i<10) {
-                third = third.with(
-                    new RtTransition(String.valueOf(i), third)
-                );
-                sixth = sixth.with(
-                    new RtTransition(String.valueOf(i), sixth)
-                );
+            if (i < 10) {
+                third = third.with(new RtTransition(String.valueOf(i), third));
+                sixth = sixth.with(new RtTransition(String.valueOf(i), sixth));
             }
-            third = third.with(
-                new RtTransition(String.valueOf((char) ('a' + i)), third)
-            );
-            sixth = sixth.with(
-                new RtTransition(String.valueOf((char) ('a' + i)), sixth)
-            );
+            third = third.with(new RtTransition(String.valueOf((char) ('a' + i)), third));
+            sixth = sixth.with(new RtTransition(String.valueOf((char) ('a' + i)), sixth));
         }
         third.with(new RtTransition("\"", fourth));
         fourth.with(new RtTransition(":", fifth));

algorithms/src/test/java/algorithms/SimulatedAnnealingLongRunningUnitTest.java

@@ -5,7 +5,7 @@ import org.junit.Test;
 
 import com.baeldung.algorithms.ga.annealing.SimulatedAnnealing;
 
-public class SimulatedAnnealingTest {
+public class SimulatedAnnealingLongRunningUnitTest {
 
     @Test
     public void testSimulateAnnealing() {

algorithms/src/test/java/com/baeldung/algorithms/primechecker/BigIntegerPrimeCheckerTest.java

@@ -1,28 +0,0 @@
-package com.baeldung.algorithms.primechecker;
-
-import static org.junit.Assert.assertTrue;
-
-import org.junit.Test;
-
-import com.baeldung.algorithms.primechecker.BigIntegerPrimeChecker;
-import com.baeldung.algorithms.primechecker.PrimeChecker;
-
-public class BigIntegerPrimeCheckerTest {
-
-    BigIntegerPrimeChecker primeChecker = new BigIntegerPrimeChecker();
-    
-    @Test
-    public void givenPrimeNumber_whenCheckIsPrime_thenTrue(){
-        assertTrue(primeChecker.isPrime(13l));
-        assertTrue(primeChecker.isPrime(1009L));
-        assertTrue(primeChecker.isPrime(74207281L));
-    }
-    
-    @Test
-    public void givenNonPrimeNumber_whenCheckIsPrime_thenFalse(){
-        assertTrue(!primeChecker.isPrime(50L));
-        assertTrue(!primeChecker.isPrime(1001L));
-        assertTrue(!primeChecker.isPrime(74207282L));
-    }
-    
-}

algorithms/src/test/java/com/baeldung/algorithms/primechecker/BruteForcePrimeCheckerTest.java

@@ -1,27 +0,0 @@
-package com.baeldung.algorithms.primechecker;
-
-import org.junit.Test;
-
-import com.baeldung.algorithms.primechecker.BruteForcePrimeChecker;
-
-import static org.junit.Assert.*;
-
-public class BruteForcePrimeCheckerTest {
-
-    BruteForcePrimeChecker primeChecker = new BruteForcePrimeChecker();
-    
-    @Test
-    public void givenPrimeNumber_whenCheckIsPrime_thenTrue(){
-        assertTrue(primeChecker.isPrime(13));
-        assertTrue(primeChecker.isPrime(1009));
-    }
-    
-    @Test
-    public void givenNonPrimeNumber_whenCheckIsPrime_thenFalse(){
-        assertTrue(!primeChecker.isPrime(50));
-        assertTrue(!primeChecker.isPrime(1001));
-    }
-    
-    
-    
-}

algorithms/src/test/java/com/baeldung/algorithms/primechecker/OptimisedPrimeCheckerTest.java

@@ -1,26 +0,0 @@
-package com.baeldung.algorithms.primechecker;
-
-import static org.junit.Assert.assertTrue;
-
-import org.junit.Test;
-
-import com.baeldung.algorithms.primechecker.OptimisedPrimeChecker;
-import com.baeldung.algorithms.primechecker.PrimeChecker;
-
-public class OptimisedPrimeCheckerTest {
-
-    OptimisedPrimeChecker primeChecker = new OptimisedPrimeChecker();
-    
-    @Test
-    public void givenPrimeNumber_whenCheckIsPrime_thenTrue(){
-        assertTrue(primeChecker.isPrime(13));
-        assertTrue(primeChecker.isPrime(1009));
-    }
-    
-    @Test
-    public void givenNonPrimeNumber_whenCheckIsPrime_thenFalse(){
-        assertTrue(!primeChecker.isPrime(50));
-        assertTrue(!primeChecker.isPrime(1001));
-    }
-    
-}

algorithms/src/test/java/com/baeldung/algorithms/primechecker/PrimeCheckerUnitTest.java

@@ -0,0 +1,69 @@
+package com.baeldung.algorithms.primechecker;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+public class PrimeCheckerUnitTest {
+
+    private final BigIntegerPrimeChecker primeChecker = new BigIntegerPrimeChecker();
+    
+    @Test
+    public void whenCheckIsPrime_thenTrue(){
+        assertTrue(primeChecker.isPrime(13l));
+        assertTrue(primeChecker.isPrime(1009L));
+        assertTrue(primeChecker.isPrime(74207281L));
+    }
+    
+    @Test
+    public void whenCheckIsPrime_thenFalse(){
+        assertTrue(!primeChecker.isPrime(50L));
+        assertTrue(!primeChecker.isPrime(1001L));
+        assertTrue(!primeChecker.isPrime(74207282L));
+    }
+
+    private final BruteForcePrimeChecker bfPrimeChecker = new BruteForcePrimeChecker();
+
+    @Test
+    public void whenBFCheckIsPrime_thenTrue(){
+        assertTrue(bfPrimeChecker.isPrime(13));
+        assertTrue(bfPrimeChecker.isPrime(1009));
+    }
+
+    @Test
+    public void whenBFCheckIsPrime_thenFalse(){
+        assertFalse(bfPrimeChecker.isPrime(50));
+        assertFalse(bfPrimeChecker.isPrime(1001));
+    }
+
+
+    private final OptimisedPrimeChecker optimisedPrimeChecker = new OptimisedPrimeChecker();
+
+    @Test
+    public void whenOptCheckIsPrime_thenTrue(){
+        assertTrue(optimisedPrimeChecker.isPrime(13));
+        assertTrue(optimisedPrimeChecker.isPrime(1009));
+    }
+
+    @Test
+    public void whenOptCheckIsPrime_thenFalse(){
+        assertFalse(optimisedPrimeChecker.isPrime(50));
+        assertFalse(optimisedPrimeChecker.isPrime(1001));
+    }
+
+    private final PrimesPrimeChecker primesPrimeChecker = new PrimesPrimeChecker();
+
+    @Test
+    public void whenPrimesCheckIsPrime_thenTrue() {
+        assertTrue(primesPrimeChecker.isPrime(13));
+        assertTrue(primesPrimeChecker.isPrime(1009));
+    }
+
+    @Test
+    public void whenPrimesCheckIsPrime_thenFalse() {
+        assertFalse(primesPrimeChecker.isPrime(50));
+        assertFalse(primesPrimeChecker.isPrime(1001));
+    }
+    
+}

algorithms/src/test/java/com/baeldung/algorithms/primechecker/PrimesPrimeCheckerTest.java

@@ -1,25 +0,0 @@
-package com.baeldung.algorithms.primechecker;
-
-import static org.junit.Assert.assertTrue;
-
-import org.junit.Test;
-
-import com.baeldung.algorithms.primechecker.PrimeChecker;
-import com.baeldung.algorithms.primechecker.PrimesPrimeChecker;
-
-public class PrimesPrimeCheckerTest {
-    PrimesPrimeChecker primeChecker = new PrimesPrimeChecker();
-
-    @Test
-    public void givenPrimeNumber_whenCheckIsPrime_thenTrue() {
-        assertTrue(primeChecker.isPrime(13));
-        assertTrue(primeChecker.isPrime(1009));
-    }
-
-    @Test
-    public void givenNonPrimeNumber_whenCheckIsPrime_thenFalse() {
-        assertTrue(!primeChecker.isPrime(50));
-        assertTrue(!primeChecker.isPrime(1001));
-    }
-
-}

annotations/annotation-processing/pom.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xmlns="http://maven.apache.org/POM/4.0.0"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    xmlns="http://maven.apache.org/POM/4.0.0"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
     <parent>

annotations/annotation-user/pom.xml

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
     <parent>
@@ -13,11 +12,6 @@
 
     <artifactId>annotation-user</artifactId>
 
-    <properties>
-        <junit.version>4.12</junit.version>
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>        
-    </properties>
-    
     <dependencies>
 
         <dependency>
@@ -26,31 +20,6 @@
             <version>${project.parent.version}</version>
         </dependency>
 
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
-            <scope>test</scope>
-        </dependency>
-
     </dependencies>
 
-    <build>
-
-        <plugins>
-
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>${maven-compiler-plugin.version}</version>
-                <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
-                </configuration>
-            </plugin>
-
-        </plugins>
-
-    </build>
-
 </project>

annotations/annotation-user/src/test/java/com/baeldung/annotation/PersonBuilderUnitTest.java

@@ -4,7 +4,7 @@ import org.junit.Test;
 
 import static org.junit.Assert.assertEquals;
 
-public class PersonBuilderTest {
+public class PersonBuilderUnitTest {
 
     @Test
     public void whenBuildPersonWithBuilder_thenObjectHasPropertyValues() {

apache-bval/pom.xml

@@ -5,6 +5,11 @@
 	<artifactId>apache-bval</artifactId>
 	<version>0.0.1-SNAPSHOT</version>
 
+            <parent>
+                <groupId>com.baeldung</groupId>
+                <artifactId>parent-modules</artifactId>
+                <version>1.0.0-SNAPSHOT</version>
+             </parent>
 	<dependencies>
 		<dependency>
 			<groupId>org.apache.bval</groupId>
@@ -21,31 +26,9 @@
 			<artifactId>bval-extras</artifactId>
 			<version>${bval.version}</version>
 		</dependency>
-
-		<dependency>
-			<groupId>junit</groupId>
-			<artifactId>junit</artifactId>
-			<version>${junit.version}</version>
-			<scope>test</scope>
-		</dependency>
 	</dependencies>
 
-	<build>
-		<plugins>
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-compiler-plugin</artifactId>
-				<version>${maven-compiler-plugin.version}</version>
-				<configuration>
-					<source>1.8</source>
-					<target>1.8</target>
-				</configuration>
-			</plugin>
-		</plugins>
-	</build>
 	<properties>
-		<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
-		<junit.version>4.12</junit.version>
 		<bval.version>1.1.2</bval.version>
 	</properties>
 </project>

apache-bval/src/test/java/com/baeldung/validation/ValidationIntegrationTest.java

@@ -17,7 +17,7 @@ import static org.junit.Assert.*;
 
 import com.baeldung.model.User;
 
-public class ValidationTest {
+public class ValidationIntegrationTest {
     private static ValidatorFactory validatorFactory;
     private static Validator validator;
 

apache-cxf/cxf-aegis/pom.xml

@@ -8,7 +8,7 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
     <properties>
-        <cxf.version>3.1.8</cxf.version>        
+        <cxf.version>3.1.8</cxf.version>
     </properties>
     <dependencies>
         <dependency>

apache-cxf/cxf-aegis/src/test/java/com/baeldung/cxf/aegis/BaeldungIntegrationTest.java

@@ -26,7 +26,7 @@ import org.apache.cxf.aegis.AegisReader;
 import org.apache.cxf.aegis.AegisWriter;
 import org.apache.cxf.aegis.type.AegisType;
 
-public class BaeldungTest {
+public class BaeldungIntegrationTest {
     private AegisContext context;
     private String fileName = "baeldung.xml";
 

apache-cxf/cxf-introduction/pom.xml

@@ -4,18 +4,18 @@
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>cxf-introduction</artifactId>
-    
+
     <parent>
         <groupId>com.baeldung</groupId>
         <artifactId>apache-cxf</artifactId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>
-    
+
     <properties>
         <cxf.version>3.1.8</cxf.version>
-        <surefire.version>2.19.1</surefire.version>        
+        <surefire.version>2.19.1</surefire.version>
     </properties>
-    
+
     <build>
         <plugins>
             <plugin>
@@ -36,7 +36,7 @@
             </plugin>
         </plugins>
     </build>
-    
+
     <dependencies>
         <dependency>
             <groupId>org.apache.cxf</groupId>

apache-cxf/cxf-jaxrs-implementation/pom.xml

@@ -4,20 +4,20 @@
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>cxf-jaxrs-implementation</artifactId>
-    
+
     <parent>
         <groupId>com.baeldung</groupId>
         <artifactId>apache-cxf</artifactId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>
-    
+
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <cxf.version>3.1.8</cxf.version>
         <httpclient.version>4.5.2</httpclient.version>
-        <surefire.version>2.19.1</surefire.version>        
+        <surefire.version>2.19.1</surefire.version>
     </properties>
-    
+
     <build>
         <plugins>
             <plugin>
@@ -38,7 +38,7 @@
             </plugin>
         </plugins>
     </build>
-    
+
     <dependencies>
         <dependency>
             <groupId>org.apache.cxf</groupId>

apache-cxf/cxf-spring/pom.xml

@@ -8,7 +8,7 @@
         <artifactId>apache-cxf</artifactId>
         <version>0.0.1-SNAPSHOT</version>
     </parent>
-    
+
     <dependencies>
         <dependency>
             <groupId>org.apache.cxf</groupId>
@@ -42,7 +42,7 @@
             <version>${javax.servlet-api.version}</version>
         </dependency>
     </dependencies>
-    
+
     <build>
         <plugins>
             <plugin>
@@ -63,7 +63,7 @@
             </plugin>
         </plugins>
     </build>
-    
+
     <profiles>
         <profile>
             <id>live</id>
@@ -102,7 +102,7 @@
                             </execution>
                         </executions>
                     </plugin>
-                    
+
                     <plugin>
                         <artifactId>maven-surefire-plugin</artifactId>
                         <version>${surefire.version}</version>
@@ -123,17 +123,17 @@
                 </plugins>
             </build>
         </profile>
-        
+
     </profiles>
-    
+
     <properties>
         <cxf.version>3.1.8</cxf.version>
         <spring.version>4.3.4.RELEASE</spring.version>
         <javax.servlet-api.version>3.1.0</javax.servlet-api.version>
-        
-        <maven-war-plugin.version>2.6</maven-war-plugin.version>        
+
+        <maven-war-plugin.version>2.6</maven-war-plugin.version>
         <surefire.version>2.19.1</surefire.version>
-        <cargo-maven2-plugin.version>1.6.1</cargo-maven2-plugin.version>        
+        <cargo-maven2-plugin.version>1.6.1</cargo-maven2-plugin.version>
     </properties>
-    
+
 </project>

apache-cxf/pom.xml

@@ -6,6 +6,12 @@
     <version>0.0.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
     <modules>
         <module>cxf-introduction</module>
         <module>cxf-spring</module>
@@ -14,33 +20,13 @@
     </modules>
 
     <properties>
-        <junit.version>4.12</junit.version>
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
         <exec-maven-plugin.version>1.5.0</exec-maven-plugin.version>
     </properties>
 
-    <dependencies>
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
     <build>
         <defaultGoal>install</defaultGoal>
         <pluginManagement>
             <plugins>
-                <plugin>
-                    <groupId>org.apache.maven.plugins</groupId>
-                    <artifactId>maven-compiler-plugin</artifactId>
-                    <version>${maven-compiler-plugin.version}</version>
-                    <configuration>
-                        <source>1.8</source>
-                        <target>1.8</target>
-                    </configuration>
-                </plugin>
                 <plugin>
                     <groupId>org.codehaus.mojo</groupId>
                     <artifactId>exec-maven-plugin</artifactId>

apache-fop/pom.xml

@@ -7,59 +7,14 @@
 
     <name>apache-fop</name>
 
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
     <dependencies>
-
-        <!-- logging -->
-
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-api</artifactId>
-            <version>${org.slf4j.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>ch.qos.logback</groupId>
-            <artifactId>logback-classic</artifactId>
-            <version>${logback.version}</version>
-            <!-- <scope>runtime</scope> -->
-        </dependency>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>jcl-over-slf4j</artifactId>
-            <version>${org.slf4j.version}</version>
-            <!-- <scope>runtime</scope> --> <!-- some spring dependencies need to compile against jcl -->
-        </dependency>
-
-        <!-- test scoped -->
-
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
-            <scope>test</scope>
-        </dependency>
-
-        <dependency>
-            <groupId>org.hamcrest</groupId>
-            <artifactId>hamcrest-core</artifactId>
-            <version>${org.hamcrest.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.hamcrest</groupId>
-            <artifactId>hamcrest-library</artifactId>
-            <version>${org.hamcrest.version}</version>
-            <scope>test</scope>
-        </dependency>
-
-        <dependency>
-            <groupId>org.mockito</groupId>
-            <artifactId>mockito-core</artifactId>
-            <version>${mockito.version}</version>
-            <scope>test</scope>
-        </dependency>
-
         <!-- new dependencies -->
-
         <dependency>
             <groupId>org.apache.xmlgraphics</groupId>
             <artifactId>fop</artifactId>
@@ -76,7 +31,7 @@
                 <exclusion>
                     <artifactId>commons-logging</artifactId>
                     <groupId>commons-logging</groupId>
-                </exclusion>                
+                </exclusion>
             </exclusions>
         </dependency>
 
@@ -94,7 +49,7 @@
                     <artifactId>commons-logging</artifactId>
                     <groupId>commons-logging</groupId>
                 </exclusion>
-            </exclusions>            
+            </exclusions>
         </dependency>
 
         <dependency>
@@ -125,35 +80,6 @@
                 <filtering>true</filtering>
             </resource>
         </resources>
-
-        <plugins>
-
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>${maven-compiler-plugin.version}</version>
-                <configuration>
-                    <source>1.7</source>
-                    <target>1.7</target>
-                </configuration>
-            </plugin>
-
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <version>${maven-surefire-plugin.version}</version>
-                <configuration>
-                    <forkCount>3</forkCount>
-                    <reuseForks>true</reuseForks>
-                    <excludes>
-                        <exclude>**/*IntegrationTest.java</exclude>
-                        <exclude>**/*LiveTest.java</exclude>
-                    </excludes>
-                </configuration>
-            </plugin>
-
-        </plugins>
-
     </build>
 
     <profiles>
@@ -197,19 +123,6 @@
         <avalon-framework.version>4.3</avalon-framework.version>
         <dbdoclet.version>8.0.2</dbdoclet.version>
         <jtidy.version>r938</jtidy.version>
-        <!-- logging -->
-        <org.slf4j.version>1.7.21</org.slf4j.version>
-        <logback.version>1.1.7</logback.version>
-
-        <!-- testing -->
-        <org.hamcrest.version>1.3</org.hamcrest.version>
-        <junit.version>4.12</junit.version>
-        <mockito.version>1.10.19</mockito.version>
-
-        <!-- maven plugins -->
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
-        <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
-
     </properties>
 
 </project>

apache-poi/pom.xml

@@ -5,34 +5,18 @@
     <artifactId>apache-poi</artifactId>
     <version>0.0.1-SNAPSHOT</version>
 
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
     <properties>
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
-        <junit.version>4.12</junit.version>
         <poi.version>3.15</poi.version>
-		<jexcel.version>1.0.6</jexcel.version>
+        <jexcel.version>1.0.6</jexcel.version>
     </properties>
 
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>${maven-compiler-plugin.version}</version>
-                <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
-
     <dependencies>
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.apache.poi</groupId>
             <artifactId>poi-ooxml</artifactId>
@@ -47,7 +31,7 @@
                     <artifactId>commons-logging</artifactId>
                     <groupId>commons-logging</groupId>
                 </exclusion>
-            </exclusions>            
-        </dependency>	
+            </exclusions>
+        </dependency>
     </dependencies>
 </project>

apache-poi/src/test/java/com/baeldung/jexcel/JExcelIntegrationTest.java

@@ -21,7 +21,7 @@ import org.junit.Test;
 import org.junit.Before;
 import org.junit.After;
 
-public class JExcelTest {
+public class JExcelIntegrationTest {
 
     private JExcelHelper jExcelHelper;
     private static String FILE_NAME = "temp.xls";

apache-poi/src/test/java/com/baeldung/poi/excel/ExcelIntegrationTest.java

@@ -18,7 +18,7 @@ import org.junit.Test;
 import org.junit.Before;
 import org.junit.After;
 
-public class ExcelTest {
+public class ExcelIntegrationTest {
 
     private ExcelPOIHelper excelPOIHelper;
     private static String FILE_NAME = "temp.xlsx";

apache-poi/src/test/java/com/baeldung/poi/word/WordIntegrationTest.java

@@ -14,12 +14,12 @@ import org.apache.poi.xwpf.usermodel.XWPFRun;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
-public class WordTest {
+public class WordIntegrationTest {
     static WordDocument wordDocument;
 
     @BeforeClass
     public static void generateMSWordFile() throws Exception {
-        WordTest.wordDocument = new WordDocument();
+        WordIntegrationTest.wordDocument = new WordDocument();
         wordDocument.handleSimpleDoc();
     }
 

apache-solrj/pom.xml

@@ -1,50 +1,23 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-	<modelVersion>4.0.0</modelVersion>
-	<groupId>com.baeldung</groupId>
-	<artifactId>apache-solrj</artifactId>
-	<version>0.0.1-SNAPSHOT</version>
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung</groupId>
+    <artifactId>apache-solrj</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
     <packaging>jar</packaging>
     <name>apache-solrj</name>
 
-	<properties>
-		<junit.version>4.12</junit.version>
-		<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
-	</properties>
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
 
-	<dependencies>
-		<dependency>
-			<groupId>org.apache.solr</groupId>
-			<artifactId>solr-solrj</artifactId>
-			<version>6.4.0</version>
-		</dependency>
-		<dependency>
-			<groupId>junit</groupId>
-			<artifactId>junit</artifactId>
-			<version>${junit.version}</version>
-			<scope>test</scope>
-		</dependency>
-	</dependencies>
-
-	<build>
-		<plugins>
-			<plugin>
-				<artifactId>maven-compiler-plugin</artifactId>
-				<version>2.3.2</version>
-			</plugin>
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-surefire-plugin</artifactId>
-				<version>${maven-surefire-plugin.version}</version>
-				<configuration>
-					<source>1.8</source>
-					<target>1.8</target>
-					<excludes>
-						<exclude>**/*IntegrationTest.java</exclude>
-						<exclude>**/*LiveTest.java</exclude>
-					</excludes>
-				</configuration>
-			</plugin>
-		</plugins>
-	</build>
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.solr</groupId>
+            <artifactId>solr-solrj</artifactId>
+            <version>6.4.0</version>
+        </dependency>
+    </dependencies>
 </project>

apache-thrift/pom.xml

@@ -6,10 +6,14 @@
     <version>0.0.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
     <properties>
         <java.versin>1.8</java.versin>
-        <junit.version>4.12</junit.version>
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
         <thrift.version>0.10.0</thrift.version>
         <maven-thrift.version>0.1.11</maven-thrift.version>
     </properties>
@@ -24,14 +28,7 @@
                     <artifactId>commons-logging</artifactId>
                     <groupId>commons-logging</groupId>
                 </exclusion>
-            </exclusions>            
-        </dependency>
-
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
-            <scope>test</scope>
+            </exclusions>
         </dependency>
 
         <dependency>
@@ -45,22 +42,15 @@
     <build>
         <defaultGoal>install</defaultGoal>
         <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>${maven-compiler-plugin.version}</version>
-                <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
-                </configuration>
-            </plugin>
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>build-helper-maven-plugin</artifactId>
                 <executions>
                     <execution>
                         <phase>generate-sources</phase>
-                        <goals><goal>add-source</goal></goals>
+                        <goals>
+                            <goal>add-source</goal>
+                        </goals>
                         <configuration>
                             <sources>
                                 <source>generated</source>

apache-thrift/src/test/java/com/baeldung/thrift/CrossPlatformServiceIntegrationTest.java

@@ -6,7 +6,7 @@ import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
 
-public class CrossPlatformServiceTest {
+public class CrossPlatformServiceIntegrationTest {
 
     private CrossPlatformServiceServer server = new CrossPlatformServiceServer();
 

apache-velocity/pom.xml

@@ -1,5 +1,5 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
 
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.baeldung</groupId>
@@ -9,27 +9,22 @@
     <packaging>war</packaging>
     <name>apache-velocity</name>
 
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
     <properties>
         <jdk.version>1.8</jdk.version>
         <jstl.version>1.2</jstl.version>
-        <junit.version>4.11</junit.version>
-        <logback.version>1.0.13</logback.version>
-        <jcl-over-slf4j.version>1.7.5</jcl-over-slf4j.version>
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
         <maven-war-plugin.version>2.6</maven-war-plugin.version>
-        <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
         <org.apache.httpcomponents.version>4.5.2</org.apache.httpcomponents.version>
         <velocity-version>1.7</velocity-version>
         <velocity-tools-version>2.0</velocity-tools-version>
     </properties>
 
     <dependencies>
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.apache.velocity</groupId>
             <artifactId>velocity</artifactId>
@@ -38,17 +33,7 @@
         <dependency>
             <groupId>org.apache.velocity</groupId>
             <artifactId>velocity-tools</artifactId>
-            <version>${velocity-tools-version}</version>        
-        </dependency>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>jcl-over-slf4j</artifactId>
-            <version>${jcl-over-slf4j.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>ch.qos.logback</groupId>
-            <artifactId>logback-classic</artifactId>
-            <version>${logback.version}</version>
+            <version>${velocity-tools-version}</version>
         </dependency>
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
@@ -60,7 +45,7 @@
                     <artifactId>commons-logging</artifactId>
                     <groupId>commons-logging</groupId>
                 </exclusion>
-            </exclusions>            
+            </exclusions>
         </dependency>
     </dependencies>
     <build>
@@ -72,15 +57,6 @@
             </resource>
         </resources>
         <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>${maven-compiler-plugin.version}</version>
-                <configuration>
-                    <source>${jdk.version}</source>
-                    <target>${jdk.version}</target>
-                </configuration>
-            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-war-plugin</artifactId>
@@ -89,19 +65,6 @@
                     <failOnMissingWebXml>false</failOnMissingWebXml>
                 </configuration>
             </plugin>
-
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <version>${maven-surefire-plugin.version}</version>
-                <configuration>
-                    <excludes>
-                        <exclude>**/*LiveTest.java</exclude>
-                    </excludes>
-                    <systemPropertyVariables>
-                    </systemPropertyVariables>
-                </configuration>
-            </plugin>
         </plugins>
     </build>
 </project>

autovalue/pom.xml

@@ -6,20 +6,11 @@
     <version>1.0</version>
     <name>autovalue</name>
 
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>${maven-compiler-plugin.version}</version>
-                <configuration>
-                    <source>7</source>
-                    <target>7</target>
-                    <useIncrementalCompilation>false</useIncrementalCompilation>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
 
     <dependencies>
         <dependency>
@@ -27,19 +18,10 @@
             <artifactId>auto-value</artifactId>
             <version>${auto-value.version}</version>
         </dependency>
-
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <auto-value.version>1.3</auto-value.version>
-        <junit.version>4.12</junit.version>
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
     </properties>
 
 </project>

aws/pom.xml

@@ -1,75 +1,81 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-	<modelVersion>4.0.0</modelVersion>
-	<groupId>com.baeldung</groupId>
-	<artifactId>aws</artifactId>
-	<version>0.1.0-SNAPSHOT</version>
-	<packaging>jar</packaging>
-	<name>aws</name>
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung</groupId>
+    <artifactId>aws</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <name>aws</name>
 
-	<properties>
-		<commons-io.version>2.5</commons-io.version>
-		<aws-lambda-java-events.version>1.3.0</aws-lambda-java-events.version>
-		<aws-lambda-java-core.version>1.1.0</aws-lambda-java-core.version>
-		<gson.version>2.8.0</gson.version>
-	</properties>
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
 
-	<dependencies>
-		<dependency>
-			<groupId>com.amazonaws</groupId>
-			<artifactId>aws-lambda-java-core</artifactId>
-			<version>${aws-lambda-java-core.version}</version>
-			<exclusions>
-				<exclusion>
-				    <artifactId>commons-logging</artifactId>
-				    <groupId>commons-logging</groupId>
-				</exclusion>
-			</exclusions>
-		</dependency>
+    <properties>
+        <commons-io.version>2.5</commons-io.version>
+        <aws-lambda-java-events.version>1.3.0</aws-lambda-java-events.version>
+        <aws-lambda-java-core.version>1.1.0</aws-lambda-java-core.version>
+        <gson.version>2.8.0</gson.version>
+    </properties>
 
-		<dependency>
-			<groupId>com.amazonaws</groupId>
-			<artifactId>aws-lambda-java-events</artifactId>
-			<version>${aws-lambda-java-events.version}</version>
-			<exclusions>
-				<exclusion>
-				    <artifactId>commons-logging</artifactId>
-				    <groupId>commons-logging</groupId>
-				</exclusion>
-			</exclusions>			
-		</dependency>
+    <dependencies>
+        <dependency>
+            <groupId>com.amazonaws</groupId>
+            <artifactId>aws-lambda-java-core</artifactId>
+            <version>${aws-lambda-java-core.version}</version>
+            <exclusions>
+                <exclusion>
+                    <artifactId>commons-logging</artifactId>
+                    <groupId>commons-logging</groupId>
+                </exclusion>
+            </exclusions>
+        </dependency>
 
-		<dependency>
-			<groupId>commons-io</groupId>
-			<artifactId>commons-io</artifactId>
-			<version>${commons-io.version}</version>
-		</dependency>
+        <dependency>
+            <groupId>com.amazonaws</groupId>
+            <artifactId>aws-lambda-java-events</artifactId>
+            <version>${aws-lambda-java-events.version}</version>
+            <exclusions>
+                <exclusion>
+                    <artifactId>commons-logging</artifactId>
+                    <groupId>commons-logging</groupId>
+                </exclusion>
+            </exclusions>
+        </dependency>
 
-		<dependency>
-			<groupId>com.google.code.gson</groupId>
-			<artifactId>gson</artifactId>
-			<version>${gson.version}</version>
-		</dependency>
-	</dependencies>
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>${commons-io.version}</version>
+        </dependency>
 
-	<build>
-		<plugins>
-			<plugin>
-				<groupId>org.apache.maven.plugins</groupId>
-				<artifactId>maven-shade-plugin</artifactId>
-				<version>3.0.0</version>
-				<configuration>
-					<createDependencyReducedPom>false</createDependencyReducedPom>
-				</configuration>
-				<executions>
-					<execution>
-						<phase>package</phase>
-						<goals>
-							<goal>shade</goal>
-						</goals>
-					</execution>
-				</executions>
-			</plugin>
-		</plugins>
-	</build>
+        <dependency>
+            <groupId>com.google.code.gson</groupId>
+            <artifactId>gson</artifactId>
+            <version>${gson.version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.0.0</version>
+                <configuration>
+                    <createDependencyReducedPom>false</createDependencyReducedPom>
+                </configuration>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
 </project>

axon/pom.xml

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <parent>
         <artifactId>parent-modules</artifactId>
         <groupId>com.baeldung</groupId>
@@ -10,18 +9,6 @@
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>axon</artifactId>
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
 
     <dependencies>
         <dependency>
@@ -35,18 +22,10 @@
             <artifactId>axon-core</artifactId>
             <version>${axon.version}</version>
         </dependency>
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <properties>
         <axon.version>3.0.2</axon.version>
-        <junit.version>4.12</junit.version>
     </properties>
 
-
 </project>

axon/src/test/java/com/baeldung/axon/MessagesAggregateIntegrationTest.java

@@ -12,7 +12,7 @@ import org.junit.Test;
 
 import java.util.UUID;
 
-public class MessagesAggregateTest {
+public class MessagesAggregateIntegrationTest {
 
     private FixtureConfiguration<MessagesAggregate> fixture;
 

cdi/pom.xml

@@ -7,11 +7,17 @@
     <artifactId>cdi</artifactId>
     <version>1.0-SNAPSHOT</version>
 
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
     <dependencies>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-core</artifactId>
-            <version>${spring.version}</version>         
+            <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
@@ -30,12 +36,6 @@
             <version>${weld-se-core.version}</version>
         </dependency>
 
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-test</artifactId>
@@ -45,23 +45,6 @@
 
     </dependencies>
 
-
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <version>${maven-surefire-plugin.version}</version>
-                <configuration>
-                    <excludes>
-                        <exclude>**/*IntegrationTest.java</exclude>
-                        <exclude>**/*LiveTest.java</exclude>
-                    </excludes>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
-
     <profiles>
         <profile>
             <id>integration</id>
@@ -100,8 +83,6 @@
         <spring.version>4.3.4.RELEASE</spring.version>
         <aspectjweaver.version>1.8.9</aspectjweaver.version>
         <weld-se-core.version>2.4.1.Final</weld-se-core.version>
-        <junit.version>4.12</junit.version>
-        <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
     </properties>
 
 </project>

core-java-9/src/test/java/com/baeldung/java9/Java9OptionalsStreamUnitTest.java

@@ -10,7 +10,7 @@ import java.util.stream.Stream;
 
 import org.junit.Test;
 
-public class Java9OptionalsStreamTest {
+public class Java9OptionalsStreamUnitTest {
 
     private static List<Optional<String>> listOfOptionals = Arrays.asList(Optional.empty(), Optional.of("foo"), Optional.empty(), Optional.of("bar"));
 

core-java-9/src/test/java/com/baeldung/java9/MultiResultionImageUnitTest.java

@@ -11,7 +11,7 @@ import java.util.List;
 
 import org.junit.Test;
 
-public class MultiResultionImageTest {
+public class MultiResultionImageUnitTest {
 
     @Test
     public void baseMultiResImageTest() {

core-java-9/src/test/java/com/baeldung/java9/OptionalToStreamUnitTest.java

@@ -6,7 +6,7 @@ import java.util.stream.Stream;
 import org.junit.Test;
 import static org.junit.Assert.assertEquals;
 
-public class OptionalToStreamTest {
+public class OptionalToStreamUnitTest {
 
     @Test
     public void testOptionalToStream() {

core-java-9/src/test/java/com/baeldung/java9/SetExamplesUnitTest.java

@@ -5,7 +5,7 @@ import org.junit.Test;
 
 import static org.junit.Assert.assertEquals;
 
-public class SetExamplesTest {
+public class SetExamplesUnitTest {
 
     @Test
     public void testUnmutableSet() {

core-java-9/src/test/java/com/baeldung/java9/concurrent/future/CompletableFutureUnitTest.java

@@ -9,7 +9,7 @@ import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertTrue;
 import org.junit.Test;
 
-public class CompletableFutureTest {
+public class CompletableFutureUnitTest {
     @Test
     public void testDelay () throws Exception {
         Object input = new Object();

core-java-9/src/test/java/com/baeldung/java9/httpclient/SimpleHttpRequestsUnitTest.java

@@ -24,7 +24,7 @@ import javax.net.ssl.SSLParameters;
 import org.junit.Before;
 import org.junit.Test;
 
-public class SimpleHttpRequestsTest {
+public class SimpleHttpRequestsUnitTest {
 
     private URI httpURI;
 

core-java-9/src/test/java/com/baeldung/java9/language/DiamondUnitTest.java

@@ -2,7 +2,7 @@ package com.baeldung.java9.language;
 
 import org.junit.Test;
 
-public class DiamondTest {
+public class DiamondUnitTest {
 
     static class FooClass<X> {
         FooClass(X x) {

core-java-9/src/test/java/com/baeldung/java9/language/PrivateInterfaceUnitTest.java

@@ -3,7 +3,7 @@ package com.baeldung.java9.language;
 import com.baeldung.java9.language.PrivateInterface;
 import org.junit.Test;
 
-public class PrivateInterfaceTest {
+public class PrivateInterfaceUnitTest {
 
     @Test
     public void test() {

core-java-9/src/test/java/com/baeldung/java9/language/TryWithResourcesUnitTest.java

@@ -3,7 +3,7 @@ package com.baeldung.java9.language;
 import static org.junit.Assert.assertEquals;
 import org.junit.Test;
 
-public class TryWithResourcesTest {
+public class TryWithResourcesUnitTest {
 
     static int closeCount = 0;
 

core-java-9/src/test/java/com/baeldung/java9/language/collections/ListFactoryMethodsUnitTest.java

@@ -9,7 +9,7 @@ import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 
-public class ListFactoryMethodsTest {
+public class ListFactoryMethodsUnitTest {
 
     @Test
     public void whenListCreated_thenSuccess() {

core-java-9/src/test/java/com/baeldung/java9/language/collections/MapFactoryMethodsUnitTest.java

@@ -8,7 +8,7 @@ import org.junit.Test;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 
-public class MapFactoryMethodsTest {
+public class MapFactoryMethodsUnitTest {
 
     @Test
     public void whenMapCreated_thenSuccess() {

core-java-9/src/test/java/com/baeldung/java9/language/collections/SetFactoryMethodsUnitTest.java

@@ -9,7 +9,7 @@ import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 
-public class SetFactoryMethodsTest {
+public class SetFactoryMethodsUnitTest {
 
     @Test
     public void whenSetCreated_thenSuccess() {

core-java-9/src/test/java/com/baeldung/java9/language/stream/CollectorImprovementUnitTest.java

@@ -8,7 +8,7 @@ import java.util.function.Function;
 
 import static org.junit.Assert.assertEquals;
 
-public class CollectorImprovementTest {
+public class CollectorImprovementUnitTest {
     @Test
     public void givenList_whenSatifyPredicate_thenMapValueWithOccurences() {
         List<Integer> numbers = List.of(1, 2, 3, 5, 5);

core-java-9/src/test/java/com/baeldung/java9/language/stream/StreamFeaturesUnitTest.java

@@ -12,7 +12,7 @@ import java.util.stream.Stream;
 import static java.lang.Integer.*;
 import static org.junit.Assert.assertEquals;
 
-public class StreamFeaturesTest {
+public class StreamFeaturesUnitTest {
 
     public static class TakeAndDropWhileTest {
 

core-java-9/src/test/java/com/baeldung/java9/process/ProcessAPIEnhancementsUnitTest.java

@@ -16,7 +16,7 @@ import org.slf4j.LoggerFactory;
  * Created by sanaulla on 2/23/2017.
  */
 
-public class ProcessAPIEnhancementsTest {
+public class ProcessAPIEnhancementsUnitTest {
 
     Logger log = LoggerFactory.getLogger(ProcessAPIEnhancementsTest.class);
 

core-java-9/src/test/java/com/baeldung/java9/process/ProcessApiUnitTest.java

@@ -20,7 +20,7 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
-public class ProcessApi {
+public class ProcessApiUnitTest {
 
     @Before
     public void init() {

core-java-9/src/test/java/com/baeldung/java9/reactive/BaeldungBatchSubscriberImplIntegrationTest.java

@@ -13,7 +13,7 @@ import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.Stopwatch;
 
-public class BaeldungBatchSubscriberImplTest {
+public class BaeldungBatchSubscriberImplIntegrationTest {
 
     private static final int ITEM_SIZE = 10;
     private SubmissionPublisher<String> publisher;

core-java-9/src/test/java/com/baeldung/java9/reactive/BaeldungSubscriberImplIntegrationTest.java

@@ -13,7 +13,7 @@ import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.Stopwatch;
 
-public class BaeldungSubscriberImplTest {
+public class BaeldungSubscriberImplIntegrationTest {
 
     private static final int ITEM_SIZE = 10;
     private SubmissionPublisher<String> publisher;

core-java-9/src/test/java/com/baeldung/java9/stackwalker/StackWalkerDemoUnitTest.java

@@ -2,7 +2,7 @@ package com.baeldung.java9.stackwalker;
 
 import org.junit.Test;
 
-public class StackWalkerDemoTest {
+public class StackWalkerDemoUnitTest {
 
     @Test
     public void giveStalkWalker_whenWalkingTheStack_thenShowStackFrames() {

core-java/README.md

@@ -98,3 +98,7 @@
 - [Quick Guide to the Java StringTokenizer](http://www.baeldung.com/java-stringtokenizer)
 - [JVM Log Forging](http://www.baeldung.com/jvm-log-forging)
 - [Guide to sun.misc.Unsafe](http://www.baeldung.com/java-unsafe)
+- [HashSet and TreeSet Comparison](http://www.baeldung.com/java-hashset-vs-treeset)
+- [How to Perform a Simple HTTP Request in Java](http://www.baeldung.com/java-http-request)
+- [Call Methods at Runtime Using Java Reflection](http://www.baeldung.com/java-method-reflection)
+- [Guide to DelayQueue](http://www.baeldung.com/java-delay-queue)

core-java/pom.xml

@@ -1,458 +1,392 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-    <modelVersion>4.0.0</modelVersion>
-    <groupId>com.baeldung</groupId>
-    <artifactId>core-java</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
-    <packaging>jar</packaging>
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<groupId>com.baeldung</groupId>
+	<artifactId>core-java</artifactId>
+	<version>0.1.0-SNAPSHOT</version>
+	<packaging>jar</packaging>
 
-    <name>core-java</name>
+	<name>core-java</name>
 
-    <dependencies>
-        
-        <!-- utils -->
-        <dependency>
-            <groupId>net.sourceforge.collections</groupId>
-            <artifactId>collections-generic</artifactId>
-            <version>${collections-generic.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>com.google.guava</groupId>
-            <artifactId>guava</artifactId>
-            <version>${guava.version}</version>
-        </dependency>
+	<dependencies>
 
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-collections4</artifactId>
-            <version>${commons-collections4.version}</version>
-        </dependency>
+		<!-- utils -->
+		<dependency>
+			<groupId>net.sourceforge.collections</groupId>
+			<artifactId>collections-generic</artifactId>
+			<version>${collections-generic.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>com.google.guava</groupId>
+			<artifactId>guava</artifactId>
+			<version>${guava.version}</version>
+		</dependency>
 
-        <dependency>
-            <groupId>commons-io</groupId>
-            <artifactId>commons-io</artifactId>
-            <version>${commons-io.version}</version>
-        </dependency>
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-collections4</artifactId>
+			<version>${commons-collections4.version}</version>
+		</dependency>
 
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-lang3</artifactId>
-            <version>${commons-lang3.version}</version>
-        </dependency>
+		<dependency>
+			<groupId>commons-io</groupId>
+			<artifactId>commons-io</artifactId>
+			<version>${commons-io.version}</version>
+		</dependency>
 
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-math3</artifactId>
-            <version>${commons-math3.version}</version>
-        </dependency>
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-lang3</artifactId>
+			<version>${commons-lang3.version}</version>
+		</dependency>
 
-        <dependency>
-            <groupId>org.bouncycastle</groupId>
-            <artifactId>bcprov-jdk15on</artifactId>
-            <version>${bouncycastle.version}</version>
-        </dependency>
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-math3</artifactId>
+			<version>${commons-math3.version}</version>
+		</dependency>
 
-        <dependency>
-            <groupId>org.unix4j</groupId>
-            <artifactId>unix4j-command</artifactId>
-            <version>${unix4j.version}</version>
-        </dependency>
+		<dependency>
+			<groupId>org.bouncycastle</groupId>
+			<artifactId>bcprov-jdk15on</artifactId>
+			<version>${bouncycastle.version}</version>
+		</dependency>
 
-        <dependency>
-            <groupId>com.googlecode.grep4j</groupId>
-            <artifactId>grep4j</artifactId>
-            <version>${grep4j.version}</version>
-        </dependency>
-        <!-- web -->
+		<dependency>
+			<groupId>org.unix4j</groupId>
+			<artifactId>unix4j-command</artifactId>
+			<version>${unix4j.version}</version>
+		</dependency>
 
-        <!-- marshalling -->
+		<dependency>
+			<groupId>com.googlecode.grep4j</groupId>
+			<artifactId>grep4j</artifactId>
+			<version>${grep4j.version}</version>
+		</dependency>
+		<!-- web -->
 
-        <dependency>
-            <groupId>com.fasterxml.jackson.core</groupId>
-            <artifactId>jackson-databind</artifactId>
-            <version>${jackson.version}</version>
-        </dependency>
+		<!-- marshalling -->
 
-        <!-- logging -->
+		<dependency>
+			<groupId>com.fasterxml.jackson.core</groupId>
+			<artifactId>jackson-databind</artifactId>
+			<version>${jackson.version}</version>
+		</dependency>
 
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-api</artifactId>
-            <version>${org.slf4j.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>ch.qos.logback</groupId>
-            <artifactId>logback-classic</artifactId>
-            <version>${logback.version}</version>
-            <!-- <scope>runtime</scope> -->
-        </dependency>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>jcl-over-slf4j</artifactId>
-            <version>${org.slf4j.version}</version>
-            <!-- <scope>runtime</scope> --> <!-- some spring dependencies need to compile against jcl -->
-        </dependency>
-        <dependency>
-            <groupId>org.projectlombok</groupId>
-            <artifactId>lombok</artifactId>
-            <version>${lombok.version}</version>
-            <scope>provided</scope>
-        </dependency>
+		<!-- logging -->
 
-        <!-- test scoped -->
+		<dependency>
+			<groupId>org.slf4j</groupId>
+			<artifactId>slf4j-api</artifactId>
+			<version>${org.slf4j.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>ch.qos.logback</groupId>
+			<artifactId>logback-classic</artifactId>
+			<version>${logback.version}</version>
+			<!-- <scope>runtime</scope> -->
+		</dependency>
+		<dependency>
+			<groupId>org.slf4j</groupId>
+			<artifactId>jcl-over-slf4j</artifactId>
+			<version>${org.slf4j.version}</version>
+			<!-- <scope>runtime</scope> --> <!-- some spring dependencies need to compile against jcl -->
+		</dependency>
+		<dependency> <!-- needed to bridge to slf4j for projects that use the log4j APIs directly -->
+			<groupId>org.slf4j</groupId>
+			<artifactId>log4j-over-slf4j</artifactId>
+			<version>${org.slf4j.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<version>${lombok.version}</version>
+			<scope>provided</scope>
+		</dependency>
 
-        <dependency>
-            <groupId>org.hamcrest</groupId>
-            <artifactId>hamcrest-all</artifactId>
-            <version>1.3</version>
-            <scope>test</scope>
-        </dependency>
+		<!-- test scoped -->
 
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>${junit.version}</version>
-            <scope>test</scope>
-        </dependency>
+		<dependency>
+			<groupId>org.hamcrest</groupId>
+			<artifactId>hamcrest-all</artifactId>
+			<version>1.3</version>
+			<scope>test</scope>
+		</dependency>
 
-        <dependency>
-            <groupId>org.hamcrest</groupId>
-            <artifactId>hamcrest-core</artifactId>
-            <version>${org.hamcrest.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.hamcrest</groupId>
-            <artifactId>hamcrest-library</artifactId>
-            <version>${org.hamcrest.version}</version>
-            <scope>test</scope>
-        </dependency>
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<version>${junit.version}</version>
+			<scope>test</scope>
+		</dependency>
 
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
+		<dependency>
+			<groupId>org.hamcrest</groupId>
+			<artifactId>hamcrest-core</artifactId>
+			<version>${org.hamcrest.version}</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.hamcrest</groupId>
+			<artifactId>hamcrest-library</artifactId>
+			<version>${org.hamcrest.version}</version>
+			<scope>test</scope>
+		</dependency>
 
-        <dependency>
-            <groupId>org.testng</groupId>
-            <artifactId>testng</artifactId>
-            <version>${testng.version}</version>
-            <scope>test</scope>
-        </dependency>
+		<dependency>
+			<groupId>org.assertj</groupId>
+			<artifactId>assertj-core</artifactId>
+			<version>${assertj.version}</version>
+			<scope>test</scope>
+		</dependency>
 
-        <dependency>
-            <groupId>org.mockito</groupId>
-            <artifactId>mockito-core</artifactId>
-            <version>${mockito.version}</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>com.jayway.awaitility</groupId>
-            <artifactId>awaitility</artifactId>
-            <version>${avaitility.version}</version>
-            <scope>test</scope>
-        </dependency>
+		<dependency>
+			<groupId>org.mockito</groupId>
+			<artifactId>mockito-core</artifactId>
+			<version>${mockito.version}</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>com.jayway.awaitility</groupId>
+			<artifactId>awaitility</artifactId>
+			<version>${avaitility.version}</version>
+			<scope>test</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>commons-codec</groupId>
+			<artifactId>commons-codec</artifactId>
+			<version>${commons-codec.version}</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.javamoney</groupId>
+			<artifactId>moneta</artifactId>
+			<version>1.1</version>
+		</dependency>
 
-        <dependency>
-            <groupId>commons-codec</groupId>
-            <artifactId>commons-codec</artifactId>
-            <version>${commons-codec.version}</version>
-        </dependency>
-        
-        <dependency>
-            <groupId>org.javamoney</groupId>
-            <artifactId>moneta</artifactId>
-            <version>1.1</version>
-        </dependency>
 		<dependency>
 			<groupId>org.owasp.esapi</groupId>
 			<artifactId>esapi</artifactId>
 			<version>2.1.0.1</version>
-			<exclusions>
-				<exclusion>
-					<artifactId>commons-logging</artifactId>
-					<groupId>commons-logging</groupId>
-				</exclusion>
-			</exclusions>        
-		</dependency>               
-		<!-- JDO -->
-		<dependency>
-		    <groupId>org.datanucleus</groupId>
-		    <artifactId>javax.jdo</artifactId>
-		    <version>3.2.0-m6</version>
-		</dependency>
-		<dependency>
-		    <groupId>org.datanucleus</groupId>
-		    <artifactId>datanucleus-core</artifactId>
-		    <version>5.1.0-m1</version>
-		</dependency>
-		<dependency>
-		    <groupId>org.datanucleus</groupId>
-		    <artifactId>datanucleus-api-jdo</artifactId>
-		    <version>5.1.0-m1</version>
-		</dependency>
-		<dependency>
-		    <groupId>org.datanucleus</groupId>
-		    <artifactId>datanucleus-rdbms</artifactId>
-		    <version>5.1.0-m1</version>
-		</dependency>
-		<dependency>
-		    <groupId>org.datanucleus</groupId>
-		    <artifactId>datanucleus-maven-plugin</artifactId>
-		    <version>5.0.2</version>
-		</dependency>		
-		<dependency>
-		    <groupId>com.h2database</groupId>
-		    <artifactId>h2</artifactId>
-		    <version>1.4.194</version>
 		</dependency>
 
-		<dependency>
-		    <groupId>org.owasp.esapi</groupId>
-		    <artifactId>esapi</artifactId>
-		    <version>2.1.0.1</version>
-	                <exclusions>
-	                    <exclusion>
-	                        <artifactId>commons-logging</artifactId>
-	                        <groupId>commons-logging</groupId>
-	                    </exclusion>
-	                </exclusions>        
-		</dependency>    
+	</dependencies>
 
-    </dependencies>
+	<build>
+		<finalName>core-java</finalName>
+		<resources>
+			<resource>
+				<directory>src/main/resources</directory>
+				<filtering>true</filtering>
+			</resource>
+		</resources>
 
-    <build>
-        <finalName>core-java</finalName>
-        <resources>
-            <resource>
-                <directory>src/main/resources</directory>
-                <filtering>true</filtering>
-            </resource>
-        </resources>
-
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>${maven-compiler-plugin.version}</version>
-                <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
-                </configuration>
-            </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-surefire-plugin</artifactId>
-                <configuration>
-                    <excludes>
-                        <exclude>**/*IntegrationTest.java</exclude>
-                        <exclude>**/*LongRunningUnitTest.java</exclude>
-                        <exclude>**/*ManualTest.java</exclude>
-                    </excludes>
-                    <testFailureIgnore>true</testFailureIgnore>
-                </configuration>
-            </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-dependency-plugin</artifactId>
-                <executions>
-                    <execution>
-                        <id>copy-dependencies</id>
-                        <phase>prepare-package</phase>
-                        <goals>
-                            <goal>copy-dependencies</goal>
-                        </goals>
-                        <configuration>
-                            <outputDirectory>${project.build.directory}/libs</outputDirectory>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
-
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-jar-plugin</artifactId>
-                <configuration>
-                    <archive>
-                        <manifest>
-                            <addClasspath>true</addClasspath>
-                            <classpathPrefix>libs/</classpathPrefix>
-                            <mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
-                        </manifest>
-                    </archive>
-                </configuration>
-            </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-assembly-plugin</artifactId>
-                <executions>
-                    <execution>
-                        <phase>package</phase>
-                        <goals>
-                            <goal>single</goal>
-                        </goals>
-                        <configuration>
-                            <archiveBaseDirectory>${project.basedir}</archiveBaseDirectory>
-                            <archive>
-                                <manifest>
-                                    <mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
-                                </manifest>
-                            </archive>
-                            <descriptorRefs>
-                                <descriptorRef>jar-with-dependencies</descriptorRef>
-                            </descriptorRefs>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-shade-plugin</artifactId>
-                <executions>
-                    <execution>
-                        <goals>
-                            <goal>shade</goal>
-                        </goals>
-                        <configuration>
-                            <shadedArtifactAttached>true</shadedArtifactAttached>
-                            <transformers>
-                                <transformer
-                                        implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
-                                    <mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
-                                </transformer>
-                            </transformers>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
-            <plugin>
-                <groupId>com.jolira</groupId>
-                <artifactId>onejar-maven-plugin</artifactId>
-                <executions>
-                    <execution>
-                        <configuration>
-                            <mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
-                            <attachToBuild>true</attachToBuild>
-                            <filename>${project.build.finalName}-onejar.${project.packaging}</filename>
-                        </configuration>
-                        <goals>
-                            <goal>one-jar</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
-            <plugin>
-                <groupId>org.springframework.boot</groupId>
-                <artifactId>spring-boot-maven-plugin</artifactId>
-                <executions>
-                    <execution>
-                        <goals>
-                            <goal>repackage</goal>
-                        </goals>
-                        <configuration>
-                            <classifier>spring-boot</classifier>
-                            <mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
-            
-            <!-- JDO Plugin -->
+		<plugins>
 
 			<plugin>
-                <groupId>org.datanucleus</groupId>
-    			<artifactId>datanucleus-maven-plugin</artifactId>
-    			<version>5.0.2</version>
-                <configuration>
-                    <api>JDO</api>
-                    <props>${basedir}/datanucleus.properties</props>
-                    <log4jConfiguration>${basedir}/log4j.properties</log4jConfiguration>
-                    <verbose>true</verbose>
-                </configuration>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<version>${maven-compiler-plugin.version}</version>
+				<configuration>
+					<source>1.8</source>
+					<target>1.8</target>
+				</configuration>
+			</plugin>
+
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-surefire-plugin</artifactId>
+				<configuration>
+					<excludes>
+						<exclude>**/*IntegrationTest.java</exclude>
+						<exclude>**/*LongRunningUnitTest.java</exclude>
+						<exclude>**/*ManualTest.java</exclude>
+					</excludes>
+					<testFailureIgnore>true</testFailureIgnore>
+				</configuration>
+			</plugin>
+
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-dependency-plugin</artifactId>
 				<executions>
-                	<execution>
-                        <phase>process-classes</phase>
-                        <goals>
-                            <goal>enhance</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
+					<execution>
+						<id>copy-dependencies</id>
+						<phase>prepare-package</phase>
+						<goals>
+							<goal>copy-dependencies</goal>
+						</goals>
+						<configuration>
+							<outputDirectory>${project.build.directory}/libs</outputDirectory>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
 
-        </plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-jar-plugin</artifactId>
+				<configuration>
+					<archive>
+						<manifest>
+							<addClasspath>true</addClasspath>
+							<classpathPrefix>libs/</classpathPrefix>
+							<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
+						</manifest>
+					</archive>
+				</configuration>
+			</plugin>
 
-    </build>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-assembly-plugin</artifactId>
+				<executions>
+					<execution>
+						<phase>package</phase>
+						<goals>
+							<goal>single</goal>
+						</goals>
+						<configuration>
+							<archiveBaseDirectory>${project.basedir}</archiveBaseDirectory>
+							<archive>
+								<manifest>
+									<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
+								</manifest>
+							</archive>
+							<descriptorRefs>
+								<descriptorRef>jar-with-dependencies</descriptorRef>
+							</descriptorRefs>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
 
-    <profiles>
-        <profile>
-            <id>integration</id>
-            <build>
-                <plugins>
-                    <plugin>
-                        <groupId>org.apache.maven.plugins</groupId>
-                        <artifactId>maven-surefire-plugin</artifactId>
-                        <executions>
-                            <execution>
-                                <phase>integration-test</phase>
-                                <goals>
-                                    <goal>test</goal>
-                                </goals>
-                                <configuration>
-                                    <excludes>
-                                        <exclude>**/*ManualTest.java</exclude>
-                                    </excludes>
-                                    <includes>
-                                        <include>**/*IntegrationTest.java</include>
-                                    </includes>
-                                </configuration>
-                            </execution>
-                        </executions>
-                        <configuration>
-                            <systemPropertyVariables>
-                                <test.mime>json</test.mime>
-                            </systemPropertyVariables>
-                        </configuration>
-                    </plugin>
-                </plugins>
-            </build>
-        </profile>
-    </profiles>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-shade-plugin</artifactId>
+				<executions>
+					<execution>
+						<goals>
+							<goal>shade</goal>
+						</goals>
+						<configuration>
+							<shadedArtifactAttached>true</shadedArtifactAttached>
+							<transformers>
+								<transformer
+									implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+									<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
+								</transformer>
+							</transformers>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
 
-    <properties>
-        <!-- marshalling -->
-        <jackson.version>2.8.5</jackson.version>
+			<plugin>
+				<groupId>com.jolira</groupId>
+				<artifactId>onejar-maven-plugin</artifactId>
+				<executions>
+					<execution>
+						<configuration>
+							<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
+							<attachToBuild>true</attachToBuild>
+							<filename>${project.build.finalName}-onejar.${project.packaging}</filename>
+						</configuration>
+						<goals>
+							<goal>one-jar</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
 
-        <!-- logging -->
-        <org.slf4j.version>1.7.21</org.slf4j.version>
-        <logback.version>1.1.7</logback.version>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<executions>
+					<execution>
+						<goals>
+							<goal>repackage</goal>
+						</goals>
+						<configuration>
+							<classifier>spring-boot</classifier>
+							<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
 
-        <!-- util -->
-        <guava.version>21.0</guava.version>
-        <commons-lang3.version>3.5</commons-lang3.version>
-        <bouncycastle.version>1.55</bouncycastle.version>
-        <commons-codec.version>1.10</commons-codec.version>
-        <commons-math3.version>3.6.1</commons-math3.version>
-        <commons-io.version>2.5</commons-io.version>
-        <commons-collections4.version>4.1</commons-collections4.version>
-        <collections-generic.version>4.01</collections-generic.version>
-        <unix4j.version>0.4</unix4j.version>
-        <grep4j.version>1.8.7</grep4j.version>
-        <lombok.version>1.16.12</lombok.version>
+		</plugins>
 
-        <!-- testing -->
-        <org.hamcrest.version>1.3</org.hamcrest.version>
-        <junit.version>4.12</junit.version>
-        <mockito.version>1.10.19</mockito.version>
-        <testng.version>6.10</testng.version>
-        <assertj.version>3.6.1</assertj.version>
-        <avaitility.version>1.7.0</avaitility.version>
+	</build>
 
-        <!-- maven plugins -->
-        <maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
-        <maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
+	<profiles>
+		<profile>
+			<id>integration</id>
+			<build>
+				<plugins>
+					<plugin>
+						<groupId>org.apache.maven.plugins</groupId>
+						<artifactId>maven-surefire-plugin</artifactId>
+						<executions>
+							<execution>
+								<phase>integration-test</phase>
+								<goals>
+									<goal>test</goal>
+								</goals>
+								<configuration>
+									<excludes>
+										<exclude>**/*ManualTest.java</exclude>
+									</excludes>
+									<includes>
+										<include>**/*IntegrationTest.java</include>
+									</includes>
+								</configuration>
+							</execution>
+						</executions>
+						<configuration>
+							<systemPropertyVariables>
+								<test.mime>json</test.mime>
+							</systemPropertyVariables>
+						</configuration>
+					</plugin>
+				</plugins>
+			</build>
+		</profile>
+	</profiles>
 
-    </properties>
+	<properties>
+		<!-- marshalling -->
+		<jackson.version>2.8.5</jackson.version>
 
-</project>
+		<!-- logging -->
+		<org.slf4j.version>1.7.21</org.slf4j.version>
+		<logback.version>1.1.7</logback.version>
+
+		<!-- util -->
+		<guava.version>21.0</guava.version>
+		<commons-lang3.version>3.5</commons-lang3.version>
+		<bouncycastle.version>1.55</bouncycastle.version>
+		<commons-codec.version>1.10</commons-codec.version>
+		<commons-math3.version>3.6.1</commons-math3.version>
+		<commons-io.version>2.5</commons-io.version>
+		<commons-collections4.version>4.1</commons-collections4.version>
+		<collections-generic.version>4.01</collections-generic.version>
+		<unix4j.version>0.4</unix4j.version>
+		<grep4j.version>1.8.7</grep4j.version>
+		<lombok.version>1.16.12</lombok.version>
+
+		<!-- testing -->
+		<org.hamcrest.version>1.3</org.hamcrest.version>
+		<junit.version>4.12</junit.version>
+		<mockito.version>1.10.19</mockito.version>
+		<assertj.version>3.6.1</assertj.version>
+		<avaitility.version>1.7.0</avaitility.version>
+
+		<!-- maven plugins -->
+		<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
+		<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
+
+	</properties>
+
+</project>

core-java/src/main/java/com/baeldung/concurrent/delayqueue/DelayObject.java

@@ -0,0 +1,35 @@
+package com.baeldung.concurrent.delayqueue;
+
+import com.google.common.primitives.Ints;
+
+import java.util.concurrent.Delayed;
+import java.util.concurrent.TimeUnit;
+
+public class DelayObject implements Delayed {
+    private String data;
+    private long startTime;
+
+    public DelayObject(String data, long delayInMilliseconds) {
+        this.data = data;
+        this.startTime = System.currentTimeMillis() + delayInMilliseconds;
+    }
+
+    @Override
+    public long getDelay(TimeUnit unit) {
+        long diff = startTime - System.currentTimeMillis();
+        return unit.convert(diff, TimeUnit.MILLISECONDS);
+    }
+
+    @Override
+    public int compareTo(Delayed o) {
+        return Ints.saturatedCast(this.startTime - ((DelayObject) o).startTime);
+    }
+
+    @Override
+    public String toString() {
+        return "{" +
+                "data='" + data + '\'' +
+                ", startTime=" + startTime +
+                '}';
+    }
+}

core-java/src/main/java/com/baeldung/concurrent/delayqueue/DelayQueueConsumer.java

@@ -0,0 +1,30 @@
+package com.baeldung.concurrent.delayqueue;
+
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.atomic.AtomicInteger;
+
+
+public class DelayQueueConsumer implements Runnable {
+    private BlockingQueue<DelayObject> queue;
+    private final Integer numberOfElementsToTake;
+    public final AtomicInteger numberOfConsumedElements = new AtomicInteger();
+
+    public DelayQueueConsumer(BlockingQueue<DelayObject> queue, Integer numberOfElementsToTake) {
+        this.queue = queue;
+        this.numberOfElementsToTake = numberOfElementsToTake;
+    }
+
+
+    @Override
+    public void run() {
+        for (int i = 0; i < numberOfElementsToTake; i++) {
+            try {
+                DelayObject object = queue.take();
+                numberOfConsumedElements.incrementAndGet();
+                System.out.println("Consumer take: " + object);
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+}

core-java/src/main/java/com/baeldung/concurrent/delayqueue/DelayQueueProducer.java

@@ -0,0 +1,34 @@
+package com.baeldung.concurrent.delayqueue;
+
+import java.util.UUID;
+import java.util.concurrent.BlockingQueue;
+
+
+public class DelayQueueProducer implements Runnable {
+    private BlockingQueue<DelayObject> queue;
+    private final Integer numberOfElementsToProduce;
+    private final Integer delayOfEachProducedMessageMilliseconds;
+
+    public DelayQueueProducer(BlockingQueue<DelayObject> queue,
+                              Integer numberOfElementsToProduce,
+                              Integer delayOfEachProducedMessageMilliseconds) {
+        this.queue = queue;
+        this.numberOfElementsToProduce = numberOfElementsToProduce;
+        this.delayOfEachProducedMessageMilliseconds = delayOfEachProducedMessageMilliseconds;
+    }
+
+    @Override
+    public void run() {
+        for (int i = 0; i < numberOfElementsToProduce; i++) {
+            DelayObject object
+                    = new DelayObject(UUID.randomUUID().toString(), delayOfEachProducedMessageMilliseconds);
+            System.out.println("Put object = " + object);
+            try {
+                queue.put(object);
+                Thread.sleep(500);
+            } catch (InterruptedException ie) {
+                ie.printStackTrace();
+            }
+        }
+    }
+}

core-java/src/main/java/com/baeldung/concurrent/phaser/LongRunningAction.java

@@ -0,0 +1,27 @@
+package com.baeldung.concurrent.phaser;
+
+import java.util.concurrent.Phaser;
+
+class LongRunningAction implements Runnable {
+    private String threadName;
+    private Phaser ph;
+
+    LongRunningAction(String threadName, Phaser ph) {
+        this.threadName = threadName;
+        this.ph = ph;
+        ph.register();
+    }
+
+    @Override
+    public void run() {
+        System.out.println("This is phase " + ph.getPhase());
+        System.out.println("Thread " + threadName + " before long running action");
+        ph.arriveAndAwaitAdvance();
+        try {
+            Thread.sleep(20);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+        ph.arriveAndDeregister();
+    }
+}

core-java/src/main/java/com/baeldung/concurrent/skiplist/Event.java

@@ -0,0 +1,21 @@
+package com.baeldung.concurrent.skiplist;
+
+import java.time.ZonedDateTime;
+
+public class Event {
+    private final ZonedDateTime eventTime;
+    private final String content;
+
+    public Event(ZonedDateTime eventTime, String content) {
+        this.eventTime = eventTime;
+        this.content = content;
+    }
+
+    public ZonedDateTime getEventTime() {
+        return eventTime;
+    }
+
+    public String getContent() {
+        return content;
+    }
+}

core-java/src/main/java/com/baeldung/concurrent/skiplist/EventWindowSort.java

@@ -0,0 +1,29 @@
+package com.baeldung.concurrent.skiplist;
+
+import java.time.ZonedDateTime;
+import java.util.Comparator;
+import java.util.concurrent.ConcurrentNavigableMap;
+import java.util.concurrent.ConcurrentSkipListMap;
+
+public class EventWindowSort {
+    private final ConcurrentSkipListMap<ZonedDateTime, String> events
+            = new ConcurrentSkipListMap<>(Comparator.comparingLong(value -> value.toInstant().toEpochMilli()));
+
+    public void acceptEvent(Event event) {
+        events.put(event.getEventTime(), event.getContent());
+    }
+
+    public ConcurrentNavigableMap<ZonedDateTime, String> getEventsFromLastMinute() {
+        return events.tailMap(ZonedDateTime
+                .now()
+                .minusMinutes(1));
+    }
+
+    public ConcurrentNavigableMap<ZonedDateTime, String> getEventsOlderThatOneMinute() {
+        return events.headMap(ZonedDateTime
+                .now()
+                .minusMinutes(1));
+    }
+
+}
+

core-java/src/main/java/com/baeldung/concurrent/sleepwait/ThreadA.java

@@ -0,0 +1,27 @@
+package com.baeldung.concurrent.sleepwait;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/***
+ * Example of waking up a waiting thread
+ */
+public class ThreadA {
+
+    private static final Logger LOG = LoggerFactory.getLogger(ThreadA.class);
+
+    private static final ThreadB b = new ThreadB();
+
+    public static void main(String... args) throws InterruptedException {
+        b.start();
+
+        synchronized (b) {
+            while (b.sum == 0) {
+                LOG.debug("Waiting for ThreadB to complete...");
+                b.wait();
+            }
+
+            LOG.debug("ThreadB has completed. Sum from that thread is: " + b.sum);
+        }
+    }
+}

core-java/src/main/java/com/baeldung/concurrent/sleepwait/ThreadB.java

@@ -0,0 +1,20 @@
+package com.baeldung.concurrent.sleepwait;
+
+/***
+ * Example of waking up a waiting thread
+ */
+class ThreadB extends Thread {
+    int sum;
+
+    @Override
+    public void run() {
+        synchronized (this) {
+            int i = 0;
+            while (i < 100000) {
+                sum += i;
+                i++;
+            }
+            notify();
+        }
+    }
+}

core-java/src/main/java/com/baeldung/concurrent/sleepwait/WaitSleepExample.java

@@ -0,0 +1,29 @@
+package com.baeldung.concurrent.sleepwait;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/***
+ * Example of wait() and sleep() methods
+ */
+public class WaitSleepExample {
+
+    private static final Logger LOG = LoggerFactory.getLogger(WaitSleepExample.class);
+
+    private static final Object LOCK = new Object();
+
+    public static void main(String... args) throws InterruptedException {
+        sleepWaitInSyncronizedBlocks();
+    }
+
+    private static void sleepWaitInSyncronizedBlocks() throws InterruptedException {
+        Thread.sleep(1000); // called on the thread
+        LOG.debug("Thread '" + Thread.currentThread().getName() + "' is woken after sleeping for 1 second");
+
+        synchronized (LOCK) {
+            LOCK.wait(1000); // called on the object, synchronization required
+            LOG.debug("Object '" + LOCK + "' is woken after waiting for 1 second");
+        }
+    }
+    
+}

core-java/src/main/java/com/baeldung/concurrent/synchronize/BaeldungSynchronizedBlocks.java

@@ -0,0 +1,35 @@
+package com.baeldung.concurrent.synchronize;
+
+public class BaeldungSynchronizedBlocks {
+
+    private int count = 0;
+    private static int staticCount = 0;
+
+    public void performSynchronisedTask() {
+        synchronized (this) {
+            setCount(getCount() + 1);
+        }
+    }
+
+    public static void performStaticSyncTask() {
+        synchronized (BaeldungSynchronizedBlocks.class) {
+            setStaticCount(getStaticCount() + 1);
+        }
+    }
+
+    public int getCount() {
+        return count;
+    }
+
+    public void setCount(int count) {
+        this.count = count;
+    }
+
+    public static int getStaticCount() {
+        return staticCount;
+    }
+
+    public static void setStaticCount(int staticCount) {
+        BaeldungSynchronizedBlocks.staticCount = staticCount;
+    }
+}

core-java/src/main/java/com/baeldung/concurrent/synchronize/BaeldungSynchronizedMethods.java

@@ -0,0 +1,37 @@
+package com.baeldung.concurrent.synchronize;
+
+public class BaeldungSynchronizedMethods {
+
+    private int sum = 0;
+    private int syncSum = 0;
+
+    public static int staticSum = 0;
+
+    public void calculate() {
+        setSum(getSum() + 1);
+    }
+
+    public synchronized void synchronisedCalculate() {
+        setSyncSum(getSyncSum() + 1);
+    }
+
+    public static synchronized void syncStaticCalculate() {
+        staticSum = staticSum + 1;
+    }
+
+    public int getSum() {
+        return sum;
+    }
+
+    public void setSum(int sum) {
+        this.sum = sum;
+    }
+
+    public int getSyncSum() {
+        return syncSum;
+    }
+
+    public void setSyncSum(int syncSum) {
+        this.syncSum = syncSum;
+    }
+}

core-java/src/main/java/com/baeldung/dirmonitoring/DirectoryMonitoringExample.java

@@ -1,14 +1,19 @@
 package com.baeldung.dirmonitoring;
 
-import java.io.File;
-
 import org.apache.commons.io.monitor.FileAlterationListener;
 import org.apache.commons.io.monitor.FileAlterationListenerAdaptor;
 import org.apache.commons.io.monitor.FileAlterationMonitor;
 import org.apache.commons.io.monitor.FileAlterationObserver;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
 
 public class DirectoryMonitoringExample {
 
+    private static final Logger LOG = LoggerFactory.getLogger(DirectoryMonitoringExample.class);
+
+
     public static final int POLL_INTERVAL = 500;
 
     public static void main(String[] args) throws Exception {
@@ -17,17 +22,17 @@ public class DirectoryMonitoringExample {
         FileAlterationListener listener = new FileAlterationListenerAdaptor() {
             @Override
             public void onFileCreate(File file) {
-                System.out.println("File: " + file.getName() + " created");
+                LOG.debug("File: " + file.getName() + " created");
             }
 
             @Override
             public void onFileDelete(File file) {
-                System.out.println("File: " + file.getName() + " deleted");
+                LOG.debug("File: " + file.getName() + " deleted");
             }
 
             @Override
             public void onFileChange(File file) {
-                System.out.println("File: " + file.getName() + " changed");
+                LOG.debug("File: " + file.getName() + " changed");
             }
         };
         observer.addListener(listener);

core-java/src/main/java/com/baeldung/doublecolon/MacbookPro.java

@@ -1,9 +1,14 @@
 package com.baeldung.doublecolon;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.util.function.Function;
 
 public class MacbookPro extends Computer {
 
+    private static final Logger LOG = LoggerFactory.getLogger(MacbookPro.class);
+
     public MacbookPro(int age, String color) {
         super(age, color);
     }
@@ -14,12 +19,12 @@ public class MacbookPro extends Computer {
 
     @Override
     public void turnOnPc() {
-        System.out.println("MacbookPro turned on");
+        LOG.debug("MacbookPro turned on");
     }
 
     @Override
     public void turnOffPc() {
-        System.out.println("MacbookPro turned off");
+        LOG.debug("MacbookPro turned off");
     }
 
     @Override
@@ -27,7 +32,7 @@ public class MacbookPro extends Computer {
 
         Function<Double, Double> function = super::calculateValue;
         final Double pcValue = function.apply(initialValue);
-        System.out.println("First value is:" + pcValue);
+        LOG.debug("First value is:" + pcValue);
         return pcValue + (initialValue / 10);
 
     }

core-java/src/main/java/com/baeldung/dynamicproxy/DynamicInvocationHandler.java

@@ -0,0 +1,19 @@
+package com.baeldung.dynamicproxy;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+
+public class DynamicInvocationHandler implements InvocationHandler {
+
+    private static Logger LOGGER = LoggerFactory.getLogger(DynamicInvocationHandler.class);
+
+    @Override
+    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
+        LOGGER.info("Invoked method: {}", method.getName());
+
+        return 42;
+    }
+}

core-java/src/main/java/com/baeldung/dynamicproxy/TimingDynamicInvocationHandler.java

@@ -0,0 +1,36 @@
+package com.baeldung.dynamicproxy;
+
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class TimingDynamicInvocationHandler implements InvocationHandler {
+
+    private static Logger LOGGER = LoggerFactory.getLogger(TimingDynamicInvocationHandler.class);
+    private final Map<String, Method> methods = new HashMap<>();
+
+    private Object target;
+
+    public TimingDynamicInvocationHandler(Object target) {
+        this.target = target;
+
+        for(Method method: target.getClass().getDeclaredMethods()) {
+            this.methods.put(method.getName(), method);
+        }
+    }
+
+    @Override
+    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
+        long start = System.nanoTime();
+        Object result = methods.get(method.getName()).invoke(target, args);
+        long elapsed = System.nanoTime() - start;
+
+        LOGGER.info("Executing {} finished in {} ns", method.getName(), elapsed);
+
+        return result;
+    }
+}

core-java/src/main/java/com/baeldung/exceptions/StackTraceToString.java

@@ -0,0 +1,30 @@
+package com.baeldung.exceptions;
+
+import org.apache.commons.lang3.exception.ExceptionUtils;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+
+public class StackTraceToString {
+
+    public static void main(String[] args) {
+        // Convert a StackTrace to String using core java
+        try {
+            throw new NullPointerException();
+        } catch (Exception e) {
+            StringWriter sw = new StringWriter();
+            PrintWriter pw = new PrintWriter(sw);
+            e.printStackTrace(pw);
+
+            System.out.println(sw.toString());
+        }
+
+        // Convert a StackTrace to String using Apache Commons
+        try {
+            throw new IndexOutOfBoundsException();
+        } catch (Exception e) {
+            System.out.println(ExceptionUtils.getStackTrace(e));
+        }
+    }
+
+}

core-java/src/main/java/com/baeldung/http/ParameterStringBuilder.java

@@ -0,0 +1,21 @@
+package com.baeldung.http;
+
+import java.io.UnsupportedEncodingException;
+import java.net.URLEncoder;
+import java.util.Map;
+
+public class ParameterStringBuilder {
+    public static String getParamsString(Map<String, String> params) throws UnsupportedEncodingException {
+        StringBuilder result = new StringBuilder();
+
+        for (Map.Entry<String, String> entry : params.entrySet()) {
+            result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
+            result.append("=");
+            result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
+            result.append("&");
+        }
+
+        String resultString = result.toString();
+        return resultString.length() > 0 ? resultString.substring(0, resultString.length() - 1) : resultString;
+    }
+}

core-java/src/main/java/com/baeldung/java/map/MyKey.java

@@ -1,6 +1,11 @@
 package com.baeldung.java.map;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 public class MyKey {
+    private static final Logger LOG = LoggerFactory.getLogger(MyKey.class);
+    
     private String name;
     private int id;
 
@@ -27,7 +32,7 @@ public class MyKey {
 
     @Override
     public int hashCode() {
-        System.out.println("Calling hashCode()");
+        LOG.debug("Calling hashCode()");
         return id;
     }
 
@@ -38,7 +43,7 @@ public class MyKey {
 
     @Override
     public boolean equals(Object obj) {
-        System.out.println("Calling equals() for key: " + obj);
+        LOG.debug("Calling equals() for key: " + obj);
         if (this == obj)
             return true;
         if (obj == null)

core-java/src/main/java/com/baeldung/java/reflection/Operations.java

@@ -0,0 +1,21 @@
+package com.baeldung.java.reflection;
+
+public class Operations {
+
+    public double publicSum(int a, double b) {
+        return a + b;
+    }
+
+    public static double publicStaticMultiply(float a, long b) {
+        return a * b;
+    }
+
+    private boolean privateAnd(boolean a, boolean b) {
+        return a && b;
+    }
+
+    protected int protectedMax(int a, int b) {
+        return a > b ? a : b;
+    }
+
+}

core-java/src/main/java/com/baeldung/jdbc/Employee.java

@@ -0,0 +1,51 @@
+package com.baeldung.jdbc;
+
+public class Employee {
+    private int id;
+    private String name;
+    private String position;
+    private double salary;
+
+    public Employee() {
+    }
+
+    public Employee(int id, String name, double salary, String position) {
+        this.id = id;
+        this.name = name;
+        this.salary = salary;
+        this.position = position;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public double getSalary() {
+        return salary;
+    }
+
+    public void setSalary(double salary) {
+        this.salary = salary;
+    }
+
+    public String getPosition() {
+        return position;
+    }
+
+    public void setPosition(String position) {
+        this.position = position;
+    }
+
+}

core-java/src/main/java/com/baeldung/jdo/GuideToJDO.java

@@ -1,143 +0,0 @@
-package com.baeldung.jdo;
-
-import java.util.Collection;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Random;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import javax.jdo.PersistenceManager;
-import javax.jdo.PersistenceManagerFactory;
-import javax.jdo.Query;
-import javax.jdo.Transaction;
-
-import org.datanucleus.api.jdo.JDOPersistenceManagerFactory;
-import org.datanucleus.metadata.PersistenceUnitMetaData;
-
-public class GuideToJDO {
-
-    private static final Logger LOGGER = Logger.getLogger(GuideToJDO.class.getName());
-    private Random rnd = new Random();
-    private PersistenceUnitMetaData pumd;
-
-    public static void main(String[] args) {
-        new GuideToJDO();
-    }
-
-    public GuideToJDO() {
-        CreateProperties();
-        CreateProducts();
-        ListProducts();
-        UpdateProducts();
-        ListProducts();
-        DeleteProducts();
-        ListProducts();
-    }
-
-    public void CreateProperties(){
-        
-        pumd = new PersistenceUnitMetaData("dynamic-unit", "RESOURCE_LOCAL", null);
-        pumd.addClassName("com.baeldung.jdo.Product");
-        pumd.setExcludeUnlistedClasses();
-        pumd.addProperty("javax.jdo.option.ConnectionDriverName", "org.h2.Driver");
-        pumd.addProperty("javax.jdo.option.ConnectionURL", "jdbc:h2:mem:mypersistence");
-        pumd.addProperty("javax.jdo.option.ConnectionUserName", "sa");
-        pumd.addProperty("javax.jdo.option.ConnectionPassword", "");
-        pumd.addProperty("datanucleus.autoCreateSchema", "true");        
-        
-    }
-    
-    public void CreateProducts() {
-        PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
-        PersistenceManager pm = pmf.getPersistenceManager();
-        Transaction tx = pm.currentTransaction();
-        try {
-            tx.begin();
-            Product product = new Product("Tablet", 80.0);
-            pm.makePersistent(product);
-            Product product2 = new Product("Phone", 20.0);
-            pm.makePersistent(product2);
-            Product product3 = new Product("Laptop", 200.0);
-            pm.makePersistent(product3);
-            for (int i = 0; i < 100; i++) {
-                String nam = "Product-" + i;
-                double price = rnd.nextDouble();
-                Product productx = new Product(nam, price);
-                pm.makePersistent(productx);
-            }
-            tx.commit();
-        } finally {
-            if (tx.isActive()) {
-                tx.rollback();
-            }
-            pm.close();
-        }
-    }
-
-    @SuppressWarnings("rawtypes")
-    public void UpdateProducts(){
-        PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
-        PersistenceManager pm = pmf.getPersistenceManager();
-        Transaction tx = pm.currentTransaction();
-        try {
-            tx.begin();
-            Query query = pm.newQuery(Product.class, "name == \"Phone\"");
-            Collection result = (Collection) query.execute();
-            Product product = (Product) result.iterator().next();
-            product.setName("Android Phone");
-            tx.commit();
-        } finally {
-            if (tx.isActive()) {
-                tx.rollback();
-            }   
-            pm.close();
-        }
-    }
-    
-    @SuppressWarnings("rawtypes")
-    public void DeleteProducts(){
-        PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
-        PersistenceManager pm = pmf.getPersistenceManager();
-        Transaction tx = pm.currentTransaction();
-        try {
-            tx.begin();
-            Query query = pm.newQuery(Product.class, "name == \"Android Phone\"");
-            Collection result = (Collection) query.execute();
-            Product product = (Product) result.iterator().next();
-            pm.deletePersistent(product);
-            tx.commit();
-        } finally {
-            if (tx.isActive()) {
-                tx.rollback();
-            }   
-            pm.close();
-        }
-    }
-    
-    @SuppressWarnings({ "rawtypes", "unchecked" })
-    public void ListProducts() {
-        PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
-        PersistenceManager pm = pmf.getPersistenceManager();
-        Transaction tx = pm.currentTransaction();
-        try {
-            tx.begin();
-
-            Query q = pm.newQuery("SELECT FROM " + Product.class.getName() + " WHERE price > 10");
-            List<Product> products = (List<Product>) q.execute();
-            Iterator<Product> iter = products.iterator();
-            while (iter.hasNext()) {
-                Product p = iter.next();
-                LOGGER.log(Level.WARNING, "Product name: {0} - Price: {1}", new Object[] { p.name, p.price });
-            }
-            LOGGER.log(Level.INFO, "--------------------------------------------------------------");
-            tx.commit();
-        } finally {
-            if (tx.isActive()) {
-                tx.rollback();
-            }
-
-            pm.close();
-        }
-    }
-}

core-java/src/main/java/com/baeldung/jmx/Game.java

@@ -1,23 +1,28 @@
 package com.baeldung.jmx;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 public class Game implements GameMBean {
 
+    private static final Logger LOG = LoggerFactory.getLogger(Game.class);
+
     private String playerName;
 
     @Override
     public void playFootball(String clubName) {
-        System.out.println(this.playerName + " playing football for " + clubName);
+        LOG.debug(this.playerName + " playing football for " + clubName);
     }
 
     @Override
     public String getPlayerName() {
-        System.out.println("Return playerName " + this.playerName);
+        LOG.debug("Return playerName " + this.playerName);
         return playerName;
     }
 
     @Override
     public void setPlayerName(String playerName) {
-        System.out.println("Set playerName to value " + playerName);
+        LOG.debug("Set playerName to value " + playerName);
         this.playerName = playerName;
     }
 

core-java/src/main/java/com/baeldung/jmx/JMXTutorialMainlauncher.java

@@ -1,19 +1,20 @@
 package com.baeldung.jmx;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.management.*;
 import java.lang.management.ManagementFactory;
-import javax.management.InstanceAlreadyExistsException;
-import javax.management.MBeanRegistrationException;
-import javax.management.MBeanServer;
-import javax.management.MalformedObjectNameException;
-import javax.management.NotCompliantMBeanException;
-import javax.management.ObjectName;
 
 public class JMXTutorialMainlauncher {
 
+    private static final Logger LOG = LoggerFactory.getLogger(JMXTutorialMainlauncher.class);
+
+
     public static void main(String[] args) {
         // TODO Auto-generated method stub
 
-        System.out.println("This is basic JMX tutorial");
+        LOG.debug("This is basic JMX tutorial");
         ObjectName objectName = null;
         try {
             objectName = new ObjectName("com.baeldung.tutorial:type=basic,name=game");
@@ -27,8 +28,8 @@ public class JMXTutorialMainlauncher {
         } catch (InstanceAlreadyExistsException | MBeanRegistrationException | NotCompliantMBeanException e) {
             e.printStackTrace();
         }
-        System.out.println("Registration for Game mbean with the platform server is successfull");
-        System.out.println("Please open jconsole to access Game mbean");
+        LOG.debug("Registration for Game mbean with the platform server is successfull");
+        LOG.debug("Please open jconsole to access Game mbean");
         while (true) {
             // to ensure application does not terminate
         }

core-java/src/main/java/com/baeldung/serialization/Address.java

@@ -0,0 +1,15 @@
+package com.baeuldung.serialization;
+
+public class Address {
+
+	private int houseNumber;
+
+	public int getHouseNumber() {
+		return houseNumber;
+	}
+
+	public void setHouseNumber(int houseNumber) {
+		this.houseNumber = houseNumber;
+	}
+
+}

core-java/src/main/java/com/baeldung/serialization/Employee.java

@@ -0,0 +1,44 @@
+package com.baeuldung.serialization;
+
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.Serializable;
+
+public class Employee implements Serializable {
+
+	private static final long serialVersionUID = 1L;
+
+	private transient Address address; // not an serializable object
+	private Person person;
+
+	public Address getAddress() {
+		return address;
+	}
+
+	public void setAddress(Address address) {
+		this.address = address;
+	}
+
+	public Person getPerson() {
+		return person;
+	}
+
+	public void setPerson(Person person) {
+		this.person = person;
+	}
+
+	private void writeObject(ObjectOutputStream oos) throws IOException {
+		oos.defaultWriteObject();
+		oos.writeObject(address.getHouseNumber());
+	}
+
+	private void readObject(ObjectInputStream ois) throws ClassNotFoundException, IOException {
+		ois.defaultReadObject();
+		Integer houseNumber = (Integer) ois.readObject();
+		Address a = new Address();
+		a.setHouseNumber(houseNumber);
+		this.setAddress(a);
+	}
+
+}

core-java/src/main/java/com/baeldung/serialization/Person.java

@@ -0,0 +1,30 @@
+package com.baeuldung.serialization;
+import java.io.Serializable;
+
+public class Person implements Serializable {
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 1L;
+
+	private int age;
+	private String name;
+
+	public int getAge() {
+		return age;
+	}
+
+	public void setAge(int age) {
+		this.age = age;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+}

core-java/src/main/java/com/baeldung/socket/EchoClient.java

@@ -1,9 +1,16 @@
 package com.baeldung.socket;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.io.*;
 import java.net.*;
 
 public class EchoClient {
+
+
+    private static final Logger LOG = LoggerFactory.getLogger(EchoClient.class);
+    
     private Socket clientSocket;
     private PrintWriter out;
     private BufferedReader in;
@@ -14,7 +21,7 @@ public class EchoClient {
             out = new PrintWriter(clientSocket.getOutputStream(), true);
             in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
         } catch (IOException e) {
-            System.out.print(e);
+            LOG.debug("Error when initializing connection", e);
         }
 
     }
@@ -34,7 +41,7 @@ public class EchoClient {
             out.close();
             clientSocket.close();
         } catch (IOException e) {
-            e.printStackTrace();
+            LOG.debug("error when closing", e);
         }
 
     }

core-java/src/main/java/com/baeldung/socket/EchoMultiServer.java

@@ -1,9 +1,15 @@
 package com.baeldung.socket;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.net.*;
 import java.io.*;
 
 public class EchoMultiServer {
+
+    private static final Logger LOG = LoggerFactory.getLogger(EchoMultiServer.class);
+
     private ServerSocket serverSocket;
 
     public void start(int port) {
@@ -57,7 +63,7 @@ public class EchoMultiServer {
                 clientSocket.close();
 
             } catch (IOException e) {
-                e.printStackTrace();
+                LOG.debug(e.getMessage());
             }
         }
     }

core-java/src/main/java/com/baeldung/socket/EchoServer.java

@@ -1,9 +1,15 @@
 package com.baeldung.socket;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.net.*;
 import java.io.*;
 
 public class EchoServer {
+
+    private static final Logger LOG = LoggerFactory.getLogger(EchoServer.class);
+
     private ServerSocket serverSocket;
     private Socket clientSocket;
     private PrintWriter out;
@@ -24,7 +30,7 @@ public class EchoServer {
                 out.println(inputLine);
             }
         } catch (IOException e) {
-            e.printStackTrace();
+            LOG.debug(e.getMessage());
         }
 
     }
@@ -36,7 +42,7 @@ public class EchoServer {
             clientSocket.close();
             serverSocket.close();
         } catch (IOException e) {
-            e.printStackTrace();
+            LOG.debug(e.getMessage());
         }
 
     }

core-java/src/main/java/com/baeldung/socket/GreetClient.java

@@ -1,5 +1,8 @@
 package com.baeldung.socket;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
@@ -7,6 +10,9 @@ import java.io.PrintWriter;
 import java.net.Socket;
 
 public class GreetClient {
+
+    private static final Logger LOG = LoggerFactory.getLogger(EchoMultiServer.class);
+
     private Socket clientSocket;
     private PrintWriter out;
     private BufferedReader in;
@@ -17,7 +23,7 @@ public class GreetClient {
             out = new PrintWriter(clientSocket.getOutputStream(), true);
             in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
         } catch (IOException e) {
-
+            LOG.debug(e.getMessage());
         }
 
     }
@@ -37,7 +43,7 @@ public class GreetClient {
             out.close();
             clientSocket.close();
         } catch (IOException e) {
-            e.printStackTrace();
+            LOG.debug(e.getMessage());
         }
     }
 

core-java/src/main/java/com/baeldung/socket/GreetServer.java

@@ -1,9 +1,15 @@
 package com.baeldung.socket;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.net.*;
 import java.io.*;
 
 public class GreetServer {
+
+    private static final Logger LOG = LoggerFactory.getLogger(GreetServer.class);
+
     private ServerSocket serverSocket;
     private Socket clientSocket;
     private PrintWriter out;
@@ -21,7 +27,7 @@ public class GreetServer {
             else
                 out.println("unrecognised greeting");
         } catch (IOException e) {
-            e.printStackTrace();
+            LOG.debug(e.getMessage());
         }
 
     }
@@ -33,7 +39,7 @@ public class GreetServer {
             clientSocket.close();
             serverSocket.close();
         } catch (IOException e) {
-            e.printStackTrace();
+            LOG.debug(e.getMessage());
         }
 
     }

core-java/src/main/java/com/baeldung/stackoverflowerror/AccountHolder.java

@@ -0,0 +1,8 @@
+package com.baeldung.stackoverflowerror;
+
+public class AccountHolder {
+    private String firstName;
+    private String lastName;
+
+    AccountHolder jointAccountHolder = new AccountHolder();
+}

core-java/src/main/java/com/baeldung/stackoverflowerror/ClassOne.java

@@ -0,0 +1,16 @@
+package com.baeldung.stackoverflowerror;
+
+public class ClassOne {
+    private int oneValue;
+    private ClassTwo clsTwoInstance = null;
+
+    public ClassOne() {
+        oneValue = 0;
+        clsTwoInstance = new ClassTwo();
+    }
+
+    public ClassOne(int oneValue, ClassTwo clsTwoInstance) {
+        this.oneValue = oneValue;
+        this.clsTwoInstance = clsTwoInstance;
+    }
+}

core-java/src/main/java/com/baeldung/stackoverflowerror/ClassTwo.java

@@ -0,0 +1,16 @@
+package com.baeldung.stackoverflowerror;
+
+public class ClassTwo {
+    private int twoValue;
+    private ClassOne clsOneInstance = null;
+
+    public ClassTwo() {
+        twoValue = 10;
+        clsOneInstance = new ClassOne();
+    }
+
+    public ClassTwo(int twoValue, ClassOne clsOneInstance) {
+        this.twoValue = twoValue;
+        this.clsOneInstance = clsOneInstance;
+    }
+}

core-java/src/main/java/com/baeldung/stackoverflowerror/InfiniteRecursionWithTerminationCondition.java

@@ -0,0 +1,7 @@
+package com.baeldung.stackoverflowerror;
+
+public class InfiniteRecursionWithTerminationCondition {
+    public int calculateFactorial(final int number) {
+        return number == 1 ? 1 : number * calculateFactorial(number - 1);
+    }
+}