Merge branch 'master' of https://github.com/eugenp/tutorials

README.md

@@ -39,6 +39,3 @@ This tutorials project is being built **[>> HERE](https://rest-security.ci.cloud
 
 - [Apache Maven Standard Directory Layout](http://www.baeldung.com/maven-directory-structure)
 - [Apache Maven Tutorial](http://www.baeldung.com/maven)
-- [Designing a User Friendly Java Library](http://www.baeldung.com/design-a-user-friendly-java-library)
-- [Java Service Provider Interface](http://www.baeldung.com/java-spi)
-- [Java Streams vs Vavr Streams](http://www.baeldung.com/vavr-java-streams)

algorithms/src/main/java/com/baeldung/algorithms/mcts/tictactoe/Board.java

@@ -148,7 +148,7 @@ public class Board {
             System.out.println("Game Draw");
             break;
         case IN_PROGRESS:
-            System.out.println("Game In rogress");
+            System.out.println("Game In Progress");
             break;
         }
     }

algorithms/src/test/java/com/baeldung/jgrapht/DirectedGraphUnitTest.java

@@ -24,7 +24,7 @@ import org.jgrapht.traverse.DepthFirstIterator;
 import org.junit.Before;
 import org.junit.Test;
 
-public class DirectedGraphUnitTests {
+public class DirectedGraphUnitTest {
     DirectedGraph<String, DefaultEdge> directedGraph;
 
     @Before

animal-sniffer-mvn-plugin/pom.xml

@@ -5,7 +5,7 @@
     <artifactId>animal-sniffer-mvn-plugin</artifactId>
     <packaging>jar</packaging>
     <version>1.0-SNAPSHOT</version>
-    <name>example-animal-sniffer-mvn-plugin</name>
+    <name>animal-sniffer-mvn-plugin</name>
     <url>http://maven.apache.org</url>
 
     <parent>

apache-cayenne/src/test/java/com/baeldung/apachecayenne/CayenneAdvancedOperationLiveTest.java

@@ -19,7 +19,7 @@ import java.util.List;
 import static junit.framework.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 
-public class CayenneAdvancedOperationIntegrationTest {
+public class CayenneAdvancedOperationLiveTest {
     private static ObjectContext context = null;
 
     @BeforeClass

apache-cayenne/src/test/java/com/baeldung/apachecayenne/CayenneOperationLiveTest.java

@@ -16,7 +16,7 @@ import static junit.framework.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 
 
-public class CayenneOperationIntegrationTest {
+public class CayenneOperationLiveTest {
     private static ObjectContext context = null;
 
     @BeforeClass

apache-opennlp/src/test/java/com/baeldung/apache/opennlp/TokenizerUnitTest.java

@@ -8,7 +8,7 @@ import opennlp.tools.tokenize.WhitespaceTokenizer;
 import static org.assertj.core.api.Assertions.assertThat;
 import org.junit.Test;
 
-public class TokenizerTest {
+public class TokenizerUnitTest {
 
     @Test
     public void givenEnglishModel_whenTokenize_thenTokensAreDetected() throws Exception {

azure/README.md

@@ -1,3 +1,4 @@
 ### Relevant Articles:
 
-- [Deploy Spring Boot App to Azure]()
+- [Deploy Spring Boot App to Azure](http://www.baeldung.com/spring-boot-azure)
+

azure/src/test/java/com/baeldung/springboot/azure/AzureApplicationIntegrationTest.java

@@ -7,7 +7,7 @@ import org.springframework.test.context.junit4.SpringRunner;
 
 @RunWith(SpringRunner.class)
 @SpringBootTest
-public class AzureApplicationTests {
+public class AzureApplicationIntegrationTest {
 
 	@Test
 	public void contextLoads() {

camel-api/pom.xml

@@ -5,7 +5,6 @@
     <groupId>com.example</groupId>
     <artifactId>spring-boot-camel</artifactId>
     <version>0.0.1-SNAPSHOT</version>
-    <name>Spring-Boot - Camel API</name>
 
     <parent>
         <groupId>com.baeldung</groupId>

cdi/pom.xml

@@ -8,9 +8,9 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-spring</artifactId>
+        <artifactId>parent-spring-4</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../parent-spring</relativePath>
+        <relativePath>../parent-spring-4</relativePath>
     </parent>
 
     <dependencies>
@@ -38,7 +38,6 @@
     </dependencies>
 
     <properties>
-        <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>
     </properties>

core-java-10/README.md

@@ -0,0 +1,5 @@
+
+### Relevant Articles: 
+
+- [Java 10 LocalVariable Type-Inference](http://www.baeldung.com/java-10-local-variable-type-inference)
+- [Guide to Java 10](http://www.baeldung.com/java-10-overview)

core-java-8/README.md

@@ -50,4 +50,6 @@
 - [Filtering Kotlin Collections](http://www.baeldung.com/kotlin-filter-collection)
 - [How to Find an Element in a List with Java](http://www.baeldung.com/find-list-element-java)
 - [Measure Elapsed Time in Java](http://www.baeldung.com/java-measure-elapsed-time)
+- [Java Optional – orElse() vs orElseGet()](http://www.baeldung.com/java-optional-or-else-vs-or-else-get)
+- [An Introduction to Java.util.Hashtable Class](http://www.baeldung.com/java-hash-table)
 

core-java-8/pom.xml

@@ -195,6 +195,16 @@
                     </execution>
                 </executions>
             </plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<version>3.1</version>
+				<configuration>
+					<source>1.8</source>
+					<target>1.8</target>
+					<compilerArgument>-parameters</compilerArgument>
+				</configuration>
+			</plugin>
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>

core-java-8/src/main/java/com/baeldung/reflect/Person.java

@@ -0,0 +1,18 @@
+package com.baeldung.reflect;
+
+public class Person {
+
+	private String fullName;
+
+	public Person(String fullName) {
+		this.fullName = fullName;
+	}
+
+	public void setFullName(String fullName) {
+		this.fullName = fullName;
+	}
+
+	public String getFullName() {
+		return fullName;
+	}
+}

core-java-8/src/test/java/com/baeldung/reflect/MethodParamNameUnitTest.java

@@ -0,0 +1,34 @@
+package com.baeldung.reflect;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.lang.reflect.Parameter;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+
+import org.junit.Test;
+
+public class MethodParamNameUnitTest {
+
+    @Test
+    public void whenGetConstructorParams_thenOk() 
+    		throws NoSuchMethodException, SecurityException {
+    	List<Parameter> parameters 
+    		= Arrays.asList(Person.class.getConstructor(String.class).getParameters());
+    	Optional<Parameter> parameter 
+    		= parameters.stream().filter(Parameter::isNamePresent).findFirst();
+    	assertThat(parameter.get().getName()).isEqualTo("fullName");  
+    }
+
+    @Test
+    public void whenGetMethodParams_thenOk() 
+    		throws NoSuchMethodException, SecurityException {
+    	List<Parameter> parameters 
+    		= Arrays.asList(
+    			Person.class.getMethod("setFullName", String.class).getParameters());
+    	Optional<Parameter> parameter 
+			= parameters.stream().filter(Parameter::isNamePresent).findFirst();
+    	assertThat(parameter.get().getName()).isEqualTo("fullName");
+    }
+}

core-java-8/src/test/java/com/baeldung/stream/StreamIndicesUnitTest.java

@@ -8,7 +8,7 @@ import java.util.List;
 
 import static org.junit.Assert.assertEquals;
 
-public class StreamIndicesTest {
+public class StreamIndicesUnitTest {
 
     @Test
     public void whenCalled_thenReturnListOfEvenIndexedStrings() {

core-java-9/README.md

@@ -24,3 +24,4 @@
 - [Method Handles in Java](http://www.baeldung.com/java-method-handles)
 - [Introduction to Chronicle Queue](http://www.baeldung.com/java-chronicle-queue)
 - [A Guide to Java 9 Modularity](http://www.baeldung.com/java-9-modularity)
+- [Optional orElse Optional](http://www.baeldung.com/java-optional-or-else-optional)

core-java-9/src/test/java/com/baeldung/java9/modules/ModuleAPIUnitTest.java

@@ -0,0 +1,199 @@
+package com.baeldung.java9.modules;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.nullValue;
+import static org.hamcrest.Matchers.contains;
+import static org.hamcrest.Matchers.containsInAnyOrder;
+import static org.hamcrest.collection.IsEmptyCollection.empty;
+import static org.junit.Assert.*;
+
+import java.lang.module.ModuleDescriptor;
+import java.lang.module.ModuleDescriptor.*;
+import java.sql.Date;
+import java.sql.Driver;
+import java.util.HashMap;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import org.junit.Before;
+import org.junit.Test;
+
+public class ModuleAPIUnitTest {
+
+    public static final String JAVA_BASE_MODULE_NAME = "java.base";
+
+    private Module javaBaseModule;
+    private Module javaSqlModule;
+    private Module module;
+
+    @Before
+    public void setUp() {
+        Class<HashMap> hashMapClass = HashMap.class;
+        javaBaseModule = hashMapClass.getModule();
+
+        Class<Date> dateClass = Date.class;
+        javaSqlModule = dateClass.getModule();
+
+        Class<Person> personClass = Person.class;
+        module = personClass.getModule();
+    }
+
+    @Test
+    public void whenCheckingIfNamed_thenModuleIsNamed() {
+        assertThat(javaBaseModule.isNamed(), is(true));
+        assertThat(javaBaseModule.getName(), is(JAVA_BASE_MODULE_NAME));
+    }
+
+    @Test
+    public void whenCheckingIfNamed_thenModuleIsUnnamed() {
+        assertThat(module.isNamed(), is(false));
+        assertThat(module.getName(), is(nullValue()));
+    }
+
+    @Test
+    public void whenExtractingPackagesContainedInAModule_thenModuleContainsOnlyFewOfThem() {
+        assertTrue(javaBaseModule.getPackages().contains("java.lang.annotation"));
+        assertFalse(javaBaseModule.getPackages().contains("java.sql"));
+    }
+
+    @Test
+    public void whenRetrievingClassLoader_thenClassLoaderIsReturned() {
+        assertThat(
+          module.getClassLoader().getClass().getName(),
+          is("jdk.internal.loader.ClassLoaders$AppClassLoader")
+        );
+    }
+
+    @Test
+    public void whenGettingAnnotationsPresentOnAModule_thenNoAnnotationsArePresent() {
+        assertThat(javaBaseModule.getAnnotations().length, is(0));
+    }
+
+    @Test
+    public void whenGettingLayerOfAModule_thenModuleLayerInformationAreAvailable() {
+        ModuleLayer javaBaseModuleLayer = javaBaseModule.getLayer();
+
+        assertTrue(javaBaseModuleLayer.configuration().findModule(JAVA_BASE_MODULE_NAME).isPresent());
+        assertThat(javaBaseModuleLayer.configuration().modules().size(), is(78));
+        assertTrue(javaBaseModuleLayer.parents().get(0).configuration().parents().isEmpty());
+    }
+
+    @Test
+    public void whenRetrievingModuleDescriptor_thenTypeOfModuleIsInferred() {
+        ModuleDescriptor javaBaseModuleDescriptor = javaBaseModule.getDescriptor();
+        ModuleDescriptor javaSqlModuleDescriptor = javaSqlModule.getDescriptor();
+
+        assertFalse(javaBaseModuleDescriptor.isAutomatic());
+        assertFalse(javaBaseModuleDescriptor.isOpen());
+        assertFalse(javaSqlModuleDescriptor.isAutomatic());
+        assertFalse(javaSqlModuleDescriptor.isOpen());
+    }
+
+    @Test
+    public void givenModuleName_whenBuildingModuleDescriptor_thenBuilt() {
+        Builder moduleBuilder = ModuleDescriptor.newModule("baeldung.base");
+
+        ModuleDescriptor moduleDescriptor = moduleBuilder.build();
+
+        assertThat(moduleDescriptor.name(), is("baeldung.base"));
+    }
+
+    @Test
+    public void givenModules_whenAccessingModuleDescriptorRequires_thenRequiresAreReturned() {
+        Set<Requires> javaBaseRequires = javaBaseModule.getDescriptor().requires();
+        Set<Requires> javaSqlRequires = javaSqlModule.getDescriptor().requires();
+
+        Set<String> javaSqlRequiresNames = javaSqlRequires.stream()
+          .map(Requires::name)
+          .collect(Collectors.toSet());
+
+        assertThat(javaBaseRequires, empty());
+        assertThat(javaSqlRequires.size(), is(3));
+        assertThat(javaSqlRequiresNames, containsInAnyOrder("java.base", "java.xml", "java.logging"));
+    }
+
+    @Test
+    public void givenModules_whenAccessingModuleDescriptorProvides_thenProvidesAreReturned() {
+        Set<Provides> javaBaseProvides = javaBaseModule.getDescriptor().provides();
+        Set<Provides> javaSqlProvides = javaSqlModule.getDescriptor().provides();
+
+        Set<String> javaBaseProvidesService = javaBaseProvides.stream()
+                .map(Provides::service)
+                .collect(Collectors.toSet());
+
+        assertThat(javaBaseProvidesService, contains("java.nio.file.spi.FileSystemProvider"));
+        assertThat(javaSqlProvides, empty());
+    }
+
+    @Test
+    public void givenModules_whenAccessingModuleDescriptorExports_thenExportsAreReturned() {
+        Set<Exports> javaBaseExports = javaBaseModule.getDescriptor().exports();
+        Set<Exports> javaSqlExports = javaSqlModule.getDescriptor().exports();
+
+        Set<String> javaSqlExportsSource = javaSqlExports.stream()
+          .map(Exports::source)
+          .collect(Collectors.toSet());
+
+        assertThat(javaBaseExports.size(), is(108));
+        assertThat(javaSqlExports.size(), is(3));
+        assertThat(javaSqlExportsSource, containsInAnyOrder("java.sql", "javax.transaction.xa", "javax.sql"));
+    }
+
+    @Test
+    public void givenModules_whenAccessingModuleDescriptorUses_thenUsesAreReturned() {
+        Set<String> javaBaseUses = javaBaseModule.getDescriptor().uses();
+        Set<String> javaSqlUses = javaSqlModule.getDescriptor().uses();
+
+        assertThat(javaBaseUses.size(), is(34));
+        assertThat(javaSqlUses, contains("java.sql.Driver"));
+    }
+
+    @Test
+    public void givenModules_whenAccessingModuleDescriptorOpen_thenOpenAreReturned() {
+        Set<Opens> javaBaseUses = javaBaseModule.getDescriptor().opens();
+        Set<Opens> javaSqlUses = javaSqlModule.getDescriptor().opens();
+
+        assertThat(javaBaseUses, empty());
+        assertThat(javaSqlUses, empty());
+    }
+
+    @Test
+    public void whenAddingReadsToAModule_thenModuleCanReadNewModule() {
+        Module updatedModule = module.addReads(javaSqlModule);
+
+        assertTrue(updatedModule.canRead(javaSqlModule));
+    }
+
+    @Test
+    public void whenExportingPackage_thenPackageIsExported() {
+        Module updatedModule = module.addExports("com.baeldung.java9.modules", javaSqlModule);
+
+        assertTrue(updatedModule.isExported("com.baeldung.java9.modules"));
+    }
+
+    @Test
+    public void whenOpeningAModulePackage_thenPackagedIsOpened() {
+        Module updatedModule = module.addOpens("com.baeldung.java9.modules", javaSqlModule);
+
+        assertTrue(updatedModule.isOpen("com.baeldung.java9.modules", javaSqlModule));
+    }
+
+    @Test
+    public void whenAddingUsesToModule_thenUsesIsAdded() {
+        Module updatedModule = module.addUses(Driver.class);
+
+        assertTrue(updatedModule.canUse(Driver.class));
+    }
+
+    private class Person {
+        private String name;
+
+        public Person(String name) {
+            this.name = name;
+        }
+
+        public String getName() {
+            return name;
+        }
+    }
+}

core-java-collections/README.md

@@ -29,3 +29,4 @@
 - [Java TreeMap vs HashMap](http://www.baeldung.com/java-treemap-vs-hashmap)
 - [How to TDD a List Implementation in Java](http://www.baeldung.com/java-test-driven-list)
 - [How to Store Duplicate Keys in a Map in Java?](http://www.baeldung.com/java-map-duplicate-keys)
+- [Getting the Size of an Iterable in Java](http://www.baeldung.com/java-iterable-size)

core-java-io/README.md

@@ -27,3 +27,4 @@
 - [A Guide to WatchService in Java NIO2](http://www.baeldung.com/java-nio2-watchservice)
 - [Guide to Java NIO2 Asynchronous Channel APIs](http://www.baeldung.com/java-nio-2-async-channels)
 - [A Guide to NIO2 Asynchronous Socket Channel](http://www.baeldung.com/java-nio2-async-socket-channel)
+- [Download a File From an URL in Java](http://www.baeldung.com/java-download-file)

core-java-io/src/test/java/com/baeldung/file/FilesManualTest.java

@@ -77,6 +77,6 @@ public class FilesManualTest {
         bw.newLine();
         bw.close();
 
-        assertThat(StreamUtils.getStringFromInputStream(new FileInputStream(fileName))).isEqualTo("UK\r\n" + "US\r\n" + "Germany\r\n" + "Spain\n");
+        assertThat(StreamUtils.getStringFromInputStream(new FileInputStream(fileName))).isEqualTo("UK\r\n" + "US\r\n" + "Germany\r\n" + "Spain\r\n");
     }
 }

core-java-io/src/test/java/org/baeldung/java/io/JavaReadFromFileUnitTest.java

@@ -1,6 +1,7 @@
 package org.baeldung.java.io;
 
 import org.junit.Test;
+import org.junit.Ignore;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -105,8 +106,9 @@ public class JavaReadFromFileUnitTest {
     }
 
     @Test
+    @Ignore // TODO
     public void whenReadUTFEncodedFile_thenCorrect() throws IOException {
-        final String expected_value = "é<EFBFBD>’空";
+        final String expected_value = "青空";
         final BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream("src/test/resources/test_read7.in"), "UTF-8"));
         final String currentLine = reader.readLine();
         reader.close();

core-java/README.md

@@ -141,3 +141,12 @@
 - [Java KeyStore API](http://www.baeldung.com/java-keystore)
 - [Double-Checked Locking with Singleton](http://www.baeldung.com/java-singleton-double-checked-locking)
 - [Guide to Java Clock Class](http://www.baeldung.com/java-clock)
+- [Infinite Loops in Java](http://www.baeldung.com/infinite-loops-java)
+- [Using Java Assertions](http://www.baeldung.com/java-assert)
+- [Pass-By-Value as a Parameter Passing Mechanism in Java](http://www.baeldung.com/java-pass-by-value-or-pass-by-reference)
+- [Check If a String Is Numeric in Java](http://www.baeldung.com/java-check-string-number)
+- [Variable and Method Hiding in Java](http://www.baeldung.com/java-variable-method-hiding)
+- [Access Modifiers in Java](http://www.baeldung.com/java-access-modifiers)
+- [NaN in Java](http://www.baeldung.com/java-not-a-number)
+- [Infinite Loops in Java](http://www.baeldung.com/infinite-loops-java)
+- [Why Use char[] Array Over a String for Storing Passwords in Java?](http://www.baeldung.com/java-storing-passwords)

core-java/pom.xml

@@ -198,6 +198,11 @@
             <artifactId>mail</artifactId>
             <version>${javax.mail.version}</version>
         </dependency>
+        <dependency>
+            <groupId>javax.mail</groupId>
+            <artifactId>mail</artifactId>
+            <version>1.5.0-b01</version>
+        </dependency>
     </dependencies>
 
     <build>

core-java/src/main/java/com/baeldung/array/JaggedArray.java

@@ -0,0 +1,49 @@
+package com.baeldung.array;
+
+import java.util.Arrays;
+import java.util.Scanner;
+
+public class JaggedArray {
+
+    int[][] shortHandFormInitialization() {
+        int[][] jaggedArr = { { 1, 2 }, { 3, 4, 5 }, { 6, 7, 8, 9 } };
+        return jaggedArr;
+    }
+
+    int[][] declarationAndThenInitialization() {
+        int[][] jaggedArr = new int[3][];
+        jaggedArr[0] = new int[] { 1, 2 };
+        jaggedArr[1] = new int[] { 3, 4, 5 };
+        jaggedArr[2] = new int[] { 6, 7, 8, 9 };
+        return jaggedArr;
+    }
+
+    int[][] declarationAndThenInitializationUsingUserInputs() {
+        int[][] jaggedArr = new int[3][];
+        jaggedArr[0] = new int[2];
+        jaggedArr[1] = new int[3];
+        jaggedArr[2] = new int[4];
+        initializeElements(jaggedArr);
+        return jaggedArr;
+    }
+
+    void initializeElements(int[][] jaggedArr) {
+        Scanner sc = new Scanner(System.in);
+        for (int outer = 0; outer < jaggedArr.length; outer++) {
+            for (int inner = 0; inner < jaggedArr[outer].length; inner++) {
+                jaggedArr[outer][inner] = sc.nextInt();
+            }
+        }
+    }
+
+    void printElements(int[][] jaggedArr) {
+        for (int index = 0; index < jaggedArr.length; index++) {
+            System.out.println(Arrays.toString(jaggedArr[index]));
+        }
+    }
+
+    int[] getElementAtGivenIndex(int[][] jaggedArr, int index) {
+        return jaggedArr[index];
+    }
+
+}

core-java/src/main/java/com/baeldung/keyword/KeywordDemo.java

@@ -1,7 +1,7 @@
 package com.baeldung.keyword;
 
 import com.baeldung.keyword.superkeyword.SuperSub;
-import com.baeldung.keyword.thiskeyword.KeywordTest;
+import com.baeldung.keyword.thiskeyword.KeywordUnitTest;
 
 /**
  * Created by Gebruiker on 5/14/2018.
@@ -9,7 +9,7 @@ import com.baeldung.keyword.thiskeyword.KeywordTest;
 public class KeywordDemo {
 
     public static void main(String[] args) {
-        KeywordTest keyword = new KeywordTest();
+        KeywordUnitTest keyword = new KeywordUnitTest();
 
         SuperSub child = new SuperSub("message from the child class");
     }

core-java/src/main/java/com/baeldung/keyword/thiskeyword/KeywordUnitTest.java

@@ -1,17 +1,17 @@
 package com.baeldung.keyword.thiskeyword;
 
-public class KeywordTest {
+public class KeywordUnitTest {
 
     private String name;
     private int age;
 
-    public KeywordTest() {
+    public KeywordUnitTest() {
         this("John", 27);
         this.printMessage();
         printInstance(this);
     }
 
-    public KeywordTest(String name, int age) {
+    public KeywordUnitTest(String name, int age) {
         this.name = name;
         this.age = age;
     }
@@ -20,11 +20,11 @@ public class KeywordTest {
         System.out.println("invoked by this");
     }
 
-    public void printInstance(KeywordTest thisKeyword) {
+    public void printInstance(KeywordUnitTest thisKeyword) {
         System.out.println(thisKeyword);
     }
 
-    public KeywordTest getCurrentInstance() {
+    public KeywordUnitTest getCurrentInstance() {
         return this;
     }
 
@@ -33,8 +33,8 @@ public class KeywordTest {
         boolean isInnerClass = true;
 
         public ThisInnerClass() {
-            KeywordTest thisKeyword = KeywordTest.this;
+            KeywordUnitTest thisKeyword = KeywordUnitTest.this;
-            String outerString = KeywordTest.this.name;
+            String outerString = KeywordUnitTest.this.name;
             System.out.println(this.isInnerClass);
         }
     }

core-java/src/main/java/com/baeldung/linkedlist/MiddleElementLookup.java

@@ -1,10 +1,20 @@
 package com.baeldung.linkedlist;
 
-import com.baeldung.linkedlist.LinkedList.Node;
+import java.util.LinkedList;
+
+import com.baeldung.linkedlist.Node;
 
 public class MiddleElementLookup {
 
-    public static String findMiddleElement(Node head) {
+    public static String findMiddleElementLinkedList(LinkedList<String> linkedList) {
+        if (linkedList == null || linkedList.isEmpty()) {
+            return null;
+        }
+
+        return linkedList.get((linkedList.size() - 1) / 2);
+    }
+
+    public static String findMiddleElementFromHead(Node head) {
         if (head == null) {
             return null;
         }
@@ -26,7 +36,7 @@ public class MiddleElementLookup {
         return current.data();
     }
 
-    public static String findMiddleElement1PassRecursively(Node head) {
+    public static String findMiddleElementFromHead1PassRecursively(Node head) {
         if (head == null) {
             return null;
         }
@@ -53,7 +63,7 @@ public class MiddleElementLookup {
         middleAux.length--;
     }
 
-    public static String findMiddleElement1PassIteratively(Node head) {
+    public static String findMiddleElementFromHead1PassIteratively(Node head) {
         if (head == null) {
             return null;
         }

core-java/src/main/java/com/baeldung/linkedlist/Node.java

@@ -0,0 +1,34 @@
+package com.baeldung.linkedlist;
+
+public class Node {
+    private Node next;
+    private String data;
+
+    public Node(String data) {
+        this.data = data;
+    }
+
+    public String data() {
+        return data;
+    }
+
+    public void setData(String data) {
+        this.data = data;
+    }
+
+    public boolean hasNext() {
+        return next != null;
+    }
+
+    public Node next() {
+        return next;
+    }
+
+    public void setNext(Node next) {
+        this.next = next;
+    }
+
+    public String toString() {
+        return this.data;
+    }
+}

core-java/src/test/java/com/baeldung/array/JaggedArrayUnitTest.java

@@ -0,0 +1,53 @@
+package com.baeldung.array;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+import java.io.PrintStream;
+
+import org.junit.Test;
+
+public class JaggedArrayUnitTest {
+
+    private JaggedArray obj = new JaggedArray();
+
+    @Test
+    public void whenInitializedUsingShortHandForm_thenCorrect() {
+        assertArrayEquals(new int[][] { { 1, 2 }, { 3, 4, 5 }, { 6, 7, 8, 9 } }, obj.shortHandFormInitialization());
+    }
+
+    @Test
+    public void whenInitializedWithDeclarationAndThenInitalization_thenCorrect() {
+        assertArrayEquals(new int[][] { { 1, 2 }, { 3, 4, 5 }, { 6, 7, 8, 9 } }, obj.declarationAndThenInitialization());
+    }
+
+    @Test
+    public void whenInitializedWithDeclarationAndThenInitalizationUsingUserInputs_thenCorrect() {
+        InputStream is = new ByteArrayInputStream("1 2 3 4 5 6 7 8 9".getBytes());
+        System.setIn(is);
+        assertArrayEquals(new int[][] { { 1, 2 }, { 3, 4, 5 }, { 6, 7, 8, 9 } }, obj.declarationAndThenInitializationUsingUserInputs());
+        System.setIn(System.in);
+    }
+
+    @Test
+    public void givenJaggedArrayAndAnIndex_thenReturnArrayAtGivenIndex() {
+        int[][] jaggedArr = { { 1, 2 }, { 3, 4, 5 }, { 6, 7, 8, 9 } };
+        assertArrayEquals(new int[] { 1, 2 }, obj.getElementAtGivenIndex(jaggedArr, 0));
+        assertArrayEquals(new int[] { 3, 4, 5 }, obj.getElementAtGivenIndex(jaggedArr, 1));
+        assertArrayEquals(new int[] { 6, 7, 8, 9 }, obj.getElementAtGivenIndex(jaggedArr, 2));
+    }
+
+    @Test
+    public void givenJaggedArray_whenUsingArraysAPI_thenVerifyPrintedElements() {
+        int[][] jaggedArr = { { 1, 2 }, { 3, 4, 5 }, { 6, 7, 8, 9 } };
+        ByteArrayOutputStream outContent = new ByteArrayOutputStream();
+        System.setOut(new PrintStream(outContent));
+        obj.printElements(jaggedArr);
+        assertEquals("[1, 2]\n[3, 4, 5]\n[6, 7, 8, 9]\n", outContent.toString());
+        System.setOut(System.out);
+    }
+
+}

core-java/src/test/java/com/baeldung/decimalformat/DecimalFormatExamplesUnitTest.java

@@ -11,7 +11,7 @@ import java.util.Locale;
 
 import org.junit.Test;
 
-public class DecimalFormatExamplesTest {
+public class DecimalFormatExamplesUnitTest {
 
 	double d = 1234567.89;
 

core-java/src/test/java/com/baeldung/dst/DaylightSavingTimeExamplesUnitTest.java

@@ -13,7 +13,7 @@ import java.util.TimeZone;
 import org.junit.Ignore;
 import org.junit.Test;
 
-public class DaylightSavingTimeExamplesTest {
+public class DaylightSavingTimeExamplesUnitTest {
 
     @Test
     public void givenItalianTimeZone_WhenDSTHappens_ThenCorrectlyShiftTimeZone() throws ParseException {        

core-java/src/test/java/com/baeldung/dst/DaylightSavingTimeJavaTimeExamplesUnitTest.java

@@ -11,7 +11,7 @@ import java.util.TimeZone;
 
 import org.junit.Test;
 
-public class DaylightSavingTimeJavaTimeExamplesTest {
+public class DaylightSavingTimeJavaTimeExamplesUnitTest {
 
     @Test
     public void givenItalianTimeZone_WhenDSTHappens_ThenCorrectlyShiftTimeZone() throws ParseException {

core-java/src/test/java/com/baeldung/extension/ExtensionUnitTest.java

@@ -3,7 +3,7 @@ package com.baeldung.extension;
 import org.junit.Assert;
 import org.junit.Test;
 
-public class ExtensionTest {
+public class ExtensionUnitTest {
     private Extension extension = new Extension();
 
     @Test

core-java/src/test/java/com/baeldung/hashcode/application/ApplicationUnitTest.java

@@ -8,7 +8,7 @@ import java.util.Map;
 
 import static org.junit.Assert.assertTrue;
 
-public class ApplicationTest {
+public class ApplicationUnitTest {
 
     @Test
     public void main_NoInputState_TextPrintedToConsole() throws Exception {

core-java/src/test/java/com/baeldung/hashcode/entities/UserUnitTest.java

@@ -5,7 +5,7 @@ import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
 
-public class UserTest {
+public class UserUnitTest {
 
     private User user;
     private User comparisonUser;

core-java/src/test/java/com/baeldung/inheritance/AppUnitTest.java

@@ -6,14 +6,14 @@ import junit.framework.Test;
 import junit.framework.TestCase;
 import junit.framework.TestSuite;
 
-public class AppTest extends TestCase {
+public class AppUnitTest extends TestCase {
     
-	public AppTest(String testName) {
+	public AppUnitTest(String testName) {
         super( testName );
     }
 
     public static Test suite() {
-        return new TestSuite(AppTest.class);
+        return new TestSuite(AppUnitTest.class);
     }
 
     @SuppressWarnings("static-access")

core-java/src/test/java/com/baeldung/initializationguide/UserUnitTest.java

@@ -6,7 +6,7 @@ import static org.assertj.core.api.Assertions.*;
 
 import java.lang.reflect.InvocationTargetException;
 
-public class UserTest {
+public class UserUnitTest {
 
     @Test
     public void givenUserInstance_whenIntializedWithNew_thenInstanceIsNotNull() {

core-java/src/test/java/com/baeldung/interfaces/InnerInterfaceUnitTest.java

@@ -7,7 +7,7 @@ import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
 
 @RunWith(JUnit4.class)
-public class InnerInterfaceTests {
+public class InnerInterfaceUnitTest {
     @Test
     public void whenCustomerListJoined_thenReturnsJoinedNames() {
         Customer.List customerList = new CommaSeparatedCustomers();

core-java/src/test/java/com/baeldung/java/currentmethod/CurrentlyExecutedMethodFinderUnitTest.java

@@ -7,7 +7,7 @@ import static org.junit.Assert.assertEquals;
 /**
  * The class presents various ways of finding the name of currently executed method.
  */
-public class CurrentlyExecutedMethodFinderTest {
+public class CurrentlyExecutedMethodFinderUnitTest {
 
     @Test
     public void givenCurrentThread_whenGetStackTrace_thenFindMethod() {

core-java/src/test/java/com/baeldung/javanetworking/uriurl/test/URIDemoLiveTest.java

@@ -23,8 +23,8 @@ import org.slf4j.LoggerFactory;
 import com.baeldung.javanetworking.uriurl.URLDemo;
 
 @FixMethodOrder
-public class URIDemoTest {
+public class URIDemoLiveTest {
-    private final Logger log = LoggerFactory.getLogger(URIDemoTest.class);
+    private final Logger log = LoggerFactory.getLogger(URIDemoLiveTest.class);
     String URISTRING = "https://wordpress.org:443/support/topic/page-jumps-within-wordpress/?replies=3#post-2278484";
     // parsed locator
     static String URISCHEME = "https";

core-java/src/test/java/com/baeldung/javanetworking/uriurl/test/URLDemoLiveTest.java

@@ -21,8 +21,8 @@ import org.slf4j.LoggerFactory;
 import com.baeldung.javanetworking.uriurl.URLDemo;
 
 @FixMethodOrder
-public class URLDemoTest {
+public class URLDemoLiveTest {
-    private final Logger log = LoggerFactory.getLogger(URLDemoTest.class);
+    private final Logger log = LoggerFactory.getLogger(URLDemoLiveTest.class);
     static String URLSTRING = "https://wordpress.org:443/support/topic/page-jumps-within-wordpress/?replies=3#post-2278484";
     // parsed locator
     static String URLPROTOCOL = "https";

core-java/src/test/java/com/baeldung/jdbc/BatchProcessingLiveTest.java

@@ -15,7 +15,7 @@ import java.sql.PreparedStatement;
 import java.sql.Statement;
 
 @RunWith(MockitoJUnitRunner.class)
-public class BatchProcessingTest {
+public class BatchProcessingLiveTest {
 
 
     @InjectMocks

core-java/src/test/java/com/baeldung/jdbcrowset/JdbcRowSetLiveTest.java

@@ -24,7 +24,7 @@ import com.sun.rowset.JdbcRowSetImpl;
 import com.sun.rowset.JoinRowSetImpl;
 import com.sun.rowset.WebRowSetImpl;
 
-public class JdbcRowSetTest {
+public class JdbcRowSetLiveTest {
     Statement stmt = null;
     String username = "sa";
     String password = "";

core-java/src/test/java/com/baeldung/junit4vstestng/SuiteUnitTest.java

@@ -5,6 +5,6 @@ import org.junit.runners.Suite;
 
 @RunWith(Suite.class)
 @Suite.SuiteClasses({ RegistrationUnitTest.class, SignInUnitTest.class })
-public class SuiteTest {
+public class SuiteUnitTest {
 
 }

core-java/src/test/java/com/baeldung/keystore/JavaKeyStoreUnitTest.java

@@ -33,7 +33,7 @@ import java.util.Date;
 /**
  * Created by adi on 4/14/18.
  */
-public class JavaKeyStoreTest {
+public class JavaKeyStoreUnitTest {
 
     private JavaKeyStore keyStore;
 

core-java/src/test/java/com/baeldung/linkedlist/MiddleElementLookupUnitTest.java

@@ -2,51 +2,46 @@ package com.baeldung.linkedlist;
 
 import static org.junit.Assert.assertEquals;
 
+import java.util.LinkedList;
+
 import org.junit.Test;
 
 public class MiddleElementLookupUnitTest {
 
     @Test
-    public void whenFindingMiddle_thenMiddleFound() {
+    public void whenFindingMiddleLinkedList_thenMiddleFound() {
-        String middle = MiddleElementLookup.findMiddleElement(createList(5).head());
+        assertEquals("3", MiddleElementLookup.findMiddleElementLinkedList(createLinkedList(5)));
-        assertEquals("3", middle);
+        assertEquals("2", MiddleElementLookup.findMiddleElementLinkedList(createLinkedList(4)));
-
-        middle = MiddleElementLookup.findMiddleElement(createList(4).head());
-        assertEquals("2", middle);
     }
 
     @Test
-    public void whenFindingMiddle1PassRecursively_thenMiddleFound() {
+    public void whenFindingMiddleFromHead_thenMiddleFound() {
-        String middle = MiddleElementLookup.findMiddleElement1PassRecursively(createList(5).head());
+        assertEquals("3", MiddleElementLookup.findMiddleElementFromHead(createNodesList(5)));
-        assertEquals("3", middle);
+        assertEquals("2", MiddleElementLookup.findMiddleElementFromHead(createNodesList(4)));
-
-        middle = MiddleElementLookup.findMiddleElement1PassRecursively(createList(4).head());
-        assertEquals("2", middle);
     }
 
     @Test
-    public void whenFindingMiddle1PassIteratively_thenMiddleFound() {
+    public void whenFindingMiddleFromHead1PassRecursively_thenMiddleFound() {
-        String middle = MiddleElementLookup.findMiddleElement1PassIteratively(createList(5).head());
+        assertEquals("3", MiddleElementLookup.findMiddleElementFromHead1PassRecursively(createNodesList(5)));
-        assertEquals("3", middle);
+        assertEquals("2", MiddleElementLookup.findMiddleElementFromHead1PassRecursively(createNodesList(4)));
+    }
 
-        middle = MiddleElementLookup.findMiddleElement1PassIteratively(createList(4).head());
+    @Test
-        assertEquals("2", middle);
+    public void whenFindingMiddleFromHead1PassIteratively_thenMiddleFound() {
+        assertEquals("3", MiddleElementLookup.findMiddleElementFromHead1PassIteratively(createNodesList(5)));
+        assertEquals("2", MiddleElementLookup.findMiddleElementFromHead1PassIteratively(createNodesList(4)));
     }
 
     @Test
     public void whenListEmptyOrNull_thenMiddleNull() {
-        String middle = MiddleElementLookup.findMiddleElement(null);
+        assertEquals(null, MiddleElementLookup.findMiddleElementLinkedList(null));
-        assertEquals(null, middle);
+        assertEquals(null, MiddleElementLookup.findMiddleElementFromHead(null));
-
+        assertEquals(null, MiddleElementLookup.findMiddleElementFromHead1PassIteratively(null));
-        middle = MiddleElementLookup.findMiddleElement1PassIteratively(null);
+        assertEquals(null, MiddleElementLookup.findMiddleElementFromHead1PassRecursively(null));
-        assertEquals(null, middle);
-
-        middle = MiddleElementLookup.findMiddleElement1PassRecursively(null);
-        assertEquals(null, middle);
     }
 
-    private static LinkedList createList(int n) {
+    private static LinkedList<String> createLinkedList(int n) {
-        LinkedList list = new LinkedList();
+        LinkedList<String> list = new LinkedList<>();
 
         for (int i = 1; i <= n; i++) {
             list.add(String.valueOf(i));
@@ -55,4 +50,17 @@ public class MiddleElementLookupUnitTest {
         return list;
     }
 
+    private static Node createNodesList(int n) {
+        Node head = new Node("1");
+        Node current = head;
+
+        for (int i = 2; i <= n; i++) {
+            Node newNode = new Node(String.valueOf(i));
+            current.setNext(newNode);
+            current = newNode;
+        }
+
+        return head;
+    }
+
 }

core-java/src/test/java/com/baeldung/maths/BigDecimalImplUnitTest.java

@@ -6,7 +6,7 @@ import org.junit.Test;
 import java.math.BigDecimal;
 import java.math.RoundingMode;
 
-public class BigDecimalImplTest {
+public class BigDecimalImplUnitTest {
 
     @Test
     public void givenBigDecimalNumbers_whenAddedTogether_thenGetExpectedResult() {

core-java/src/test/java/com/baeldung/maths/BigIntegerImplUnitTest.java

@@ -5,7 +5,7 @@ import org.junit.Test;
 
 import java.math.BigInteger;
 
-public class BigIntegerImplTest {
+public class BigIntegerImplUnitTest {
 
     @Test
     public void givenBigIntegerNumbers_whenAddedTogether_thenGetExpectedResult() {

core-java/src/test/java/com/baeldung/maths/FloatingPointArithmeticUnitTest.java

@@ -5,7 +5,7 @@ import java.math.BigDecimal;
 import org.junit.Assert;
 import org.junit.Test;
 
-public class FloatingPointArithmeticTest {
+public class FloatingPointArithmeticUnitTest {
 
     @Test
     public void givenDecimalNumbers_whenAddedTogether_thenGetExpectedResult() {

core-java/src/test/java/com/baeldung/maths/RoundUnitTest.java

@@ -8,7 +8,7 @@ import org.junit.Test;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotEquals;
 
-public class RoundTest {
+public class RoundUnitTest {
     private double value = 2.03456d;
     private int places = 2;
     private double delta = 0.0d;

core-java/src/test/java/com/baeldung/noclassdeffounderror/NoClassDefFoundErrorUnitTest.java

@@ -2,7 +2,7 @@ package com.baeldung.noclassdeffounderror;
 
 import org.junit.Test;
 
-public class NoClassDefFoundErrorTest {
+public class NoClassDefFoundErrorUnitTest {
 
     @Test(expected = NoClassDefFoundError.class)
     public void givenInitErrorInClass_whenloadClass_thenNoClassDefFoundError() {

core-java/src/test/java/com/baeldung/recursion/RecursionExampleUnitTest.java

@@ -3,7 +3,7 @@ package com.baeldung.recursion;
 import org.junit.Assert;
 import org.junit.Test;
 
-public class RecursionExampleTest {
+public class RecursionExampleUnitTest {
     
     RecursionExample recursion = new RecursionExample();
 

core-java/src/test/java/com/baeldung/reflection/BaeldungReflectionUtilsUnitTest.java

@@ -7,7 +7,7 @@ import java.util.List;
 
 import static org.junit.Assert.assertTrue;
 
-public class BaeldungReflectionUtilsTest {
+public class BaeldungReflectionUtilsUnitTest {
 
     @Test
     public void givenCustomer_whenAFieldIsNull_thenFieldNameInResult() throws Exception {

core-java/src/test/java/com/baeldung/regexp/EscapingCharsUnitTest.java

@@ -10,7 +10,7 @@ import static org.hamcrest.CoreMatchers.equalTo;
 import static org.hamcrest.CoreMatchers.not;
 import static org.junit.Assert.assertThat;
 
-public class EscapingCharsTest {
+public class EscapingCharsUnitTest {
     @Test
     public void givenRegexWithDot_whenMatchingStr_thenMatches() {
         String strInput = "foof";

core-java/src/test/java/com/baeldung/sneakythrows/SneakyRunnableUnitTest.java

@@ -4,7 +4,7 @@ import org.junit.Test;
 
 import static junit.framework.TestCase.assertEquals;
 
-public class SneakyRunnableTest {
+public class SneakyRunnableUnitTest {
 
     @Test
     public void whenCallSneakyRunnableMethod_thenThrowException() {

core-java/src/test/java/com/baeldung/sneakythrows/SneakyThrowsUnitTest.java

@@ -4,7 +4,7 @@ import org.junit.Test;
 
 import static junit.framework.TestCase.assertEquals;
 
-public class SneakyThrowsTest {
+public class SneakyThrowsUnitTest {
 
     @Test
     public void whenCallSneakyMethod_thenThrowSneakyException() {

core-java/src/test/java/com/baeldung/string/PalindromeUnitTest.java

@@ -3,7 +3,7 @@ package com.baeldung.string;
 import static org.junit.Assert.*;
 import org.junit.Test;
 
-public class PalindromeTest {
+public class PalindromeUnitTest {
 
     private String[] words = {
             "Anna",

core-java/src/test/java/com/baeldung/string/StringComparisonUnitTest.java

@@ -7,7 +7,7 @@ import java.util.Objects;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-public class StringComparisonTest {
+public class StringComparisonUnitTest {
 
     @Test
     public void whenUsingComparisonOperator_ThenComparingStrings(){

core-java/src/test/java/com/baeldung/string/StringUnitTest.java

@@ -12,7 +12,7 @@ import java.util.regex.PatternSyntaxException;
 
 import org.junit.Test;
 
-public class StringTest {
+public class StringUnitTest {
 
     @Test
     public void whenCallCodePointAt_thenDecimalUnicodeReturned() {

core-java/src/test/java/com/baeldung/string/formatter/StringFormatterExampleUnitTest.java

@@ -8,7 +8,7 @@ import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import org.junit.Test;
 
-public class StringFormatterExampleTests {
+public class StringFormatterExampleUnitTest {
 
     @Test
     public void givenString_whenFormatSpecifierForCalendar_thenGotExpected() {

core-java/src/test/java/com/baeldung/system/DateTimeServiceUnitTest.java

@@ -3,7 +3,7 @@ package com.baeldung.system;
 import org.junit.Assert;
 import org.junit.Test;
 
-public class DateTimeServiceTest {
+public class DateTimeServiceUnitTest {
 
     @Test
     public void givenClass_whenCalledMethods_thenNotNullInResult() {

core-java/src/test/java/com/baeldung/system/EnvironmentVariablesUnitTest.java

@@ -3,7 +3,7 @@ package com.baeldung.system;
 import org.junit.Assert;
 import org.junit.Test;
 
-public class EnvironmentVariablesTest {
+public class EnvironmentVariablesUnitTest {
 
     @Test
     public void givenEnvVars_whenReadPath_thenGetValueinResult() {

core-java/src/test/java/com/baeldung/system/SystemArrayCopyUnitTest.java

@@ -3,7 +3,7 @@ package com.baeldung.system;
 import org.junit.Assert;
 import org.junit.Test;
 
-public class SystemArrayCopyTest {
+public class SystemArrayCopyUnitTest {
 
     @Test
     public void givenTwoArraysAB_whenUseArrayCopy_thenArrayCopiedFromAToBInResult() {

core-java/src/test/java/com/baeldung/system/SystemNanoUnitTest.java

@@ -3,7 +3,7 @@ package com.baeldung.system;
 import org.junit.Assert;
 import org.junit.Test;
 
-public class SystemNanoTest {
+public class SystemNanoUnitTest {
 
     @Test
     public void givenSystem_whenCalledNanoTime_thenGivesTimeinResult() {

core-java/src/test/java/com/baeldung/system/SystemPropertiesUnitTest.java

@@ -6,7 +6,7 @@ import org.junit.Test;
 
 import java.util.Properties;
 
-public class SystemPropertiesTest {
+public class SystemPropertiesUnitTest {
 
     @Test
     public void givenSystem_whenCalledGetProperty_thenReturnPropertyinResult() {

core-java/src/test/java/com/baeldung/system/WhenDetectingOSUnitTest.java

@@ -5,7 +5,7 @@ import org.junit.Ignore;
 import org.junit.Test;
 
 @Ignore
-public class WhenDetectingOSTest {
+public class WhenDetectingOSUnitTest {
 
     private DetectOS os = new DetectOS();
 

core-java/src/test/java/com/baeldung/threadlocalrandom/ThreadLocalRandomIntegrationTest.java

@@ -5,7 +5,7 @@ import java.util.concurrent.ThreadLocalRandom;
 import static org.junit.Assert.assertTrue;
 import org.junit.Test;
 
-public class ThreadLocalRandomTest {
+public class ThreadLocalRandomIntegrationTest {
     
     @Test
     public void givenUsingThreadLocalRandom_whenGeneratingRandomIntBounded_thenCorrect() {

core-java/src/test/java/com/baeldung/util/PropertiesLoaderUnitTest.java

@@ -7,7 +7,7 @@ import java.util.Properties;
 
 import static org.junit.Assert.assertEquals;
 
-public class PropertiesLoaderTest {
+public class PropertiesLoaderUnitTest {
 
     @Test
     public void loadProperties_whenPropertyReaded_thenSuccess() throws IOException {

core-java/src/test/java/com/baeldung/varargs/FormatterUnitTest.java

@@ -5,7 +5,7 @@ import org.junit.Test;
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.MatcherAssert.assertThat;
 
-public class FormatterTest {
+public class FormatterUnitTest {
 
     private final static String FORMAT = "%s %s %s";
 

core-java/src/test/java/org/baeldung/java/rawtypes/RawTypesUnitTest.java

@@ -5,7 +5,7 @@ import java.util.List;
 
 import org.junit.Test;
 
-public class RawTypesTest {
+public class RawTypesUnitTest {
     @Test
     public void shouldCreateListUsingRawTypes() {
         @SuppressWarnings("rawtypes")

core-kotlin/README.md

@@ -27,3 +27,6 @@
 - [Guide to Kotlin @JvmField](http://www.baeldung.com/kotlin-jvm-field-annotation)
 - [Filtering Kotlin Collections](http://www.baeldung.com/kotlin-filter-collection)
 - [Writing to a File in Kotlin](http://www.baeldung.com/kotlin-write-file)
+- [Lambda Expressions in Kotlin](http://www.baeldung.com/kotlin-lambda-expressions)
+- [Writing Specifications with Kotlin and Spek](http://www.baeldung.com/kotlin-spek)
+- [Processing JSON with Kotlin and Klaxson](http://www.baeldung.com/kotlin-json-klaxson)

core-kotlin/src/main/kotlin/com/baeldung/enums/CardType.kt

@@ -0,0 +1,48 @@
+package com.baeldung.enums
+
+enum class CardType(val color: String) : ICardLimit {
+    SILVER("gray") {
+        override fun getCreditLimit(): Int {
+            return 100000
+        }
+
+        override fun calculateCashbackPercent(): Float {
+            return 0.25f
+        }
+    },
+    GOLD("yellow") {
+        override fun getCreditLimit(): Int {
+            return 200000
+        }
+
+        override fun calculateCashbackPercent(): Float {
+            return 0.5f
+        }
+    },
+    PLATINUM("black") {
+        override fun getCreditLimit(): Int {
+            return 300000
+        }
+
+        override fun calculateCashbackPercent(): Float {
+            return 0.75f
+        }
+    };
+
+    companion object {
+        fun getCardTypeByColor(color: String): CardType? {
+            for (cardType in CardType.values()) {
+                if (cardType.color.equals(color)) {
+                    return cardType;
+                }
+            }
+            return null
+        }
+
+        fun getCardTypeByName(name: String): CardType {
+            return CardType.valueOf(name.toUpperCase())
+        }
+    }
+
+    abstract fun calculateCashbackPercent(): Float
+}

core-kotlin/src/main/kotlin/com/baeldung/enums/ICardLimit.kt

@@ -0,0 +1,5 @@
+package com.baeldung.enums
+
+interface ICardLimit {
+    fun getCreditLimit(): Int
+}

core-kotlin/src/test/kotlin/com/baeldung/enums/CardTypeUnitTest.kt

@@ -0,0 +1,84 @@
+package com.baeldung.enums
+
+import org.junit.jupiter.api.Assertions
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
+
+internal class CardTypeUnitTest {
+
+    @Test
+    fun givenSilverCardType_whenCalculateCashbackPercent_thenReturnCashbackValue() {
+        assertEquals(0.25f, CardType.SILVER.calculateCashbackPercent())
+    }
+
+    @Test
+    fun givenGoldCardType_whenCalculateCashbackPercent_thenReturnCashbackValue() {
+        assertEquals(0.5f, CardType.GOLD.calculateCashbackPercent())
+    }
+
+    @Test
+    fun givenPlatinumCardType_whenCalculateCashbackPercent_thenReturnCashbackValue() {
+        assertEquals(0.75f, CardType.PLATINUM.calculateCashbackPercent())
+    }
+
+    @Test
+    fun givenSilverCardType_whenGetCreditLimit_thenReturnCreditLimit() {
+        assertEquals(100000, CardType.SILVER.getCreditLimit())
+    }
+
+    @Test
+    fun givenGoldCardType_whenGetCreditLimit_thenReturnCreditLimit() {
+        assertEquals(200000, CardType.GOLD.getCreditLimit())
+    }
+
+    @Test
+    fun givenPlatinumCardType_whenGetCreditLimit_thenReturnCreditLimit() {
+        assertEquals(300000, CardType.PLATINUM.getCreditLimit())
+    }
+
+    @Test
+    fun givenSilverCardType_whenCheckColor_thenReturnColor() {
+        assertEquals("gray", CardType.SILVER.color)
+    }
+
+    @Test
+    fun givenGoldCardType_whenCheckColor_thenReturnColor() {
+        assertEquals("yellow", CardType.GOLD.color)
+    }
+
+    @Test
+    fun givenPlatinumCardType_whenCheckColor_thenReturnColor() {
+        assertEquals("black", CardType.PLATINUM.color)
+    }
+
+    @Test
+    fun whenGetCardTypeByColor_thenSilverCardType() {
+        Assertions.assertEquals(CardType.SILVER, CardType.getCardTypeByColor("gray"))
+    }
+
+    @Test
+    fun whenGetCardTypeByColor_thenGoldCardType() {
+        Assertions.assertEquals(CardType.GOLD, CardType.getCardTypeByColor("yellow"))
+    }
+
+    @Test
+    fun whenGetCardTypeByColor_thenPlatinumCardType() {
+        Assertions.assertEquals(CardType.PLATINUM, CardType.getCardTypeByColor("black"))
+    }
+
+    @Test
+    fun whenGetCardTypeByName_thenSilverCardType() {
+        Assertions.assertEquals(CardType.SILVER, CardType.getCardTypeByName("silver"))
+    }
+
+    @Test
+    fun whenGetCardTypeByName_thenGoldCardType() {
+        Assertions.assertEquals(CardType.GOLD, CardType.getCardTypeByName("gold"))
+    }
+
+    @Test
+    fun whenGetCardTypeByName_thenPlatinumCardType() {
+        Assertions.assertEquals(CardType.PLATINUM, CardType.getCardTypeByName("platinum"))
+    }
+
+}

custom-pmd/src/main/java/org/baeldung/pmd/UnitTestNamingConventionRule.java

@@ -14,18 +14,17 @@ public class UnitTestNamingConventionRule extends AbstractJavaRule {
       "ManualTest",
       "JdbcTest",
       "LiveTest",
-      "UnitTest");
+      "UnitTest",
+      "jmhTest");
 
     public Object visit(ASTClassOrInterfaceDeclaration node, Object data) {
         String className = node.getImage();
         Objects.requireNonNull(className);
 
-        if (className.endsWith("Test") || className.endsWith("Tests")) {
+        if (className.endsWith("Tests")
-            if (allowedEndings.stream()
+                || (className.endsWith("Test") && allowedEndings.stream().noneMatch(className::endsWith))) {
-              .noneMatch(className::endsWith)) {
             addViolation(data, node);
         }
-        }
 
         return data;
     }

dagger/README.md

@@ -1 +1,3 @@
-### Relevant articles
+### Relevant articles:
+
+- [Introduction to Dagger 2](http://www.baeldung.com/dagger-2)

drools/pom.xml

@@ -6,9 +6,9 @@
 
     <parent>
 		<groupId>com.baeldung</groupId>
-		<artifactId>parent-spring</artifactId>
+		<artifactId>parent-spring-4</artifactId>
 		<version>0.0.1-SNAPSHOT</version>
-		<relativePath>../parent-spring</relativePath>
+		<relativePath>../parent-spring-4</relativePath>
 	</parent>
 
     <dependencies>
@@ -54,7 +54,6 @@
         <http-component-version>4.4.6</http-component-version>
         <drools-version>7.4.1.Final</drools-version>
         <apache-poi-version>3.13</apache-poi-version>
-        <spring.version>4.3.6.RELEASE</spring.version>
     </properties>
 
 </project>

drools/src/test/java/com/baeldung/drools/backward_chaining/BackwardChainingIntegrationTest.java

@@ -10,7 +10,7 @@ import com.baeldung.drools.model.Result;
 
 import static junit.framework.TestCase.assertEquals;
 
-public class BackwardChainingTest {
+public class BackwardChainingIntegrationTest {
     private Result result;
     private KieSession ksession;
  

ejb/ejb-client/pom.xml

@@ -3,7 +3,6 @@
          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>ejb-client</artifactId>
-    <name>EJB3 Client Maven</name>
     <description>EJB3 Client Maven</description>
 
     <parent>

ethereumj/pom.xml

@@ -10,10 +10,10 @@
     <name>ethereumj</name>
 
     <parent>
-        <artifactId>parent-boot-5</artifactId>
+        <artifactId>parent-boot-1</artifactId>
         <groupId>com.baeldung</groupId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../parent-boot-5</relativePath>
+        <relativePath>../parent-boot-1</relativePath>
     </parent>
 
     <repositories>

flips/pom.xml

@@ -8,10 +8,10 @@
     <name>flips</name>
 
     <parent>
-        <artifactId>parent-boot-5</artifactId>
+        <artifactId>parent-boot-1</artifactId>
         <groupId>com.baeldung</groupId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../parent-boot-5</relativePath>
+        <relativePath>../parent-boot-1</relativePath>
     </parent>
 
     <dependencies>

flips/src/test/java/com/baeldung/flips/controller/FlipControllerIntegrationTest.java

@@ -23,7 +23,7 @@ import org.springframework.test.web.servlet.result.MockMvcResultMatchers;
 }, webEnvironment = SpringBootTest.WebEnvironment.MOCK)
 @AutoConfigureMockMvc
 @ActiveProfiles("dev")
-public class FlipControllerTest {
+public class FlipControllerIntegrationTest {
 
     @Autowired private MockMvc mvc;
 

flyway/pom.xml

@@ -8,10 +8,10 @@
     <description>Flyway Callbacks Demo</description>
 
     <parent>
-        <artifactId>parent-boot-5</artifactId>
+        <artifactId>parent-boot-1</artifactId>
         <groupId>com.baeldung</groupId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../parent-boot-5</relativePath>
+        <relativePath>../parent-boot-1</relativePath>
     </parent>
 
     <dependencies>

grpc/pom.xml

@@ -5,8 +5,6 @@
     <artifactId>grpc-demo</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <packaging>jar</packaging>
-    <name>grpc-demo</name>
-    <url>http://maven.apache.org</url>
 
     <parent>
         <groupId>com.baeldung</groupId>

guava-modules/guava-18/src/test/java/com/baeldung/guava/GuavaMiscUtilsUnitTest.java

@@ -11,7 +11,7 @@ import java.util.concurrent.ConcurrentHashMap;
 
 import static org.hamcrest.CoreMatchers.equalTo;
 
-public class GuavaMiscUtilsTest {
+public class GuavaMiscUtilsUnitTest {
     @Test
     public void whenHashingData_shouldReturnCorrectHashCode() throws Exception {
         int receivedData = 123;

guava-modules/guava-19/src/test/java/com/baeldung/guava/GuavaMiscUtilsUnitTest.java

@@ -12,7 +12,7 @@ import static org.hamcrest.collection.IsIterableContainingInAnyOrder.containsInA
 import static org.hamcrest.core.AnyOf.anyOf;
 import static org.junit.Assert.*;
 
-public class GuavaMiscUtilsTest {
+public class GuavaMiscUtilsUnitTest {
 
     @Test
     public void whenGettingLazyStackTrace_ListShouldBeReturned() throws Exception {

guava-modules/guava-21/src/test/java/com/baeldung/guava/zip/ZipCollectionUnitTest.java

@@ -13,7 +13,7 @@ import java.util.stream.IntStream;
 
 import static org.junit.Assert.assertEquals;
 
-public class ZipCollectionTest {
+public class ZipCollectionUnitTest {
 
     private List<String> names;
     private List<Integer> ages;

guava/src/test/java/org/baeldung/guava/BloomFilterUnitTest.java

@@ -9,7 +9,7 @@ import java.util.stream.IntStream;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-public class BloomFilterTest {
+public class BloomFilterUnitTest {
 
     @Test
     public void givenBloomFilter_whenAddNStringsToIt_thenShouldNotReturnAnyFalsePositive() {

guava/src/test/java/org/baeldung/guava/GuavaCountingOutputStreamUnitTest.java

@@ -7,7 +7,7 @@ import org.junit.Test;
 
 import com.google.common.io.CountingOutputStream;
 
-public class GuavaCountingOutputStreamTest {
+public class GuavaCountingOutputStreamUnitTest {
     public static final int MAX = 5;
 
     @Test(expected = RuntimeException.class)

guest/spring-mvc/pom.xml

@@ -27,28 +27,6 @@
         </dependency>
     </dependencies>
 
-    <repositories>
-        <repository>
-            <id>spring-milestones</id>
-            <name>Spring Milestones</name>
-            <url>https://repo.spring.io/milestone</url>
-            <snapshots>
-                <enabled>false</enabled>
-            </snapshots>
-        </repository>
-    </repositories>
-
-    <pluginRepositories>
-        <pluginRepository>
-            <id>spring-milestones</id>
-            <name>Spring Milestones</name>
-            <url>https://repo.spring.io/milestone</url>
-            <snapshots>
-                <enabled>false</enabled>
-            </snapshots>
-        </pluginRepository>
-    </pluginRepositories>
-
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

guest/spring-security/pom.xml

@@ -45,28 +45,6 @@
         </dependency>
     </dependencies>
 
-    <repositories>
-        <repository>
-            <id>spring-milestones</id>
-            <name>Spring Milestones</name>
-            <url>https://repo.spring.io/milestone</url>
-            <snapshots>
-                <enabled>false</enabled>
-            </snapshots>
-        </repository>
-    </repositories>
-
-    <pluginRepositories>
-        <pluginRepository>
-            <id>spring-milestones</id>
-            <name>Spring Milestones</name>
-            <url>https://repo.spring.io/milestone</url>
-            <snapshots>
-                <enabled>false</enabled>
-            </snapshots>
-        </pluginRepository>
-    </pluginRepositories>
-
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

handling-spring-static-resources/pom.xml

@@ -10,9 +10,9 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-spring</artifactId>
+        <artifactId>parent-spring-4</artifactId>
     	<version>0.0.1-SNAPSHOT</version>
-    	<relativePath>../parent-spring</relativePath>
+    	<relativePath>../parent-spring-4</relativePath>
     </parent>
 
     <dependencies>
@@ -37,7 +37,7 @@
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-core</artifactId>
-            <version>${org.springframework.version}</version>
+            <version>${spring.version}</version>
             <exclusions>
                 <exclusion>
                     <artifactId>commons-logging</artifactId>
@@ -48,43 +48,43 @@
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-context</artifactId>
-            <version>${org.springframework.version}</version>
+            <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-jdbc</artifactId>
-            <version>${org.springframework.version}</version>
+            <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-beans</artifactId>
-            <version>${org.springframework.version}</version>
+            <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-aop</artifactId>
-            <version>${org.springframework.version}</version>
+            <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-tx</artifactId>
-            <version>${org.springframework.version}</version>
+            <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-expression</artifactId>
-            <version>${org.springframework.version}</version>
+            <version>${spring.version}</version>
         </dependency>
 
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-web</artifactId>
-            <version>${org.springframework.version}</version>
+            <version>${spring.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-webmvc</artifactId>
-            <version>${org.springframework.version}</version>
+            <version>${spring.version}</version>
         </dependency>
 
         <!-- AOP -->
@@ -190,8 +190,7 @@
         <java-version>1.8</java-version>
 
         <!-- Spring -->
-        <org.springframework.version>4.3.4.RELEASE</org.springframework.version>
+        <org.springframework.security.version>4.2.6.RELEASE</org.springframework.security.version>
-        <org.springframework.security.version>4.2.0.RELEASE</org.springframework.security.version>
 
         <org.aspectj-version>1.8.9</org.aspectj-version>
         <javax.servlet.jsp-api.version>2.3.2-b02</javax.servlet.jsp-api.version>

hibernate5/README.md

@@ -10,3 +10,5 @@
 - [JPA Attribute Converters](http://www.baeldung.com/jpa-attribute-converters)
 - [Mapping LOB Data in Hibernate](http://www.baeldung.com/hibernate-lob)
 - [@Immutable in Hibernate](http://www.baeldung.com/hibernate-immutable)
+- [Pessimistic Locking in JPA](http://www.baeldung.com/jpa-pessimistic-locking)
+

hystrix/pom.xml

@@ -6,10 +6,10 @@
     <name>hystrix</name>
 
     <parent>
-        <artifactId>parent-boot-5</artifactId>
+        <artifactId>parent-boot-1</artifactId>
         <groupId>com.baeldung</groupId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../parent-boot-5</relativePath>
+        <relativePath>../parent-boot-1</relativePath>
     </parent>
 
     <dependencies>

java-lite/src/test/java/app/models/ProductUnitTest.java

@@ -4,7 +4,7 @@ import org.javalite.activejdbc.Base;
 import org.junit.Assert;
 import org.junit.Test;
 
-public class ProductTest {
+public class ProductUnitTest {
 
     //@Test
     public void givenSavedProduct_WhenFindFirst_ThenSavedProductIsReturned() {

java-spi/README.md

@@ -0,0 +1,4 @@
+
+### Relevant Articles: 
+
+- [Java Service Provider Interface](http://www.baeldung.com/java-spi)

java-vavr-stream/README.md

@@ -0,0 +1,5 @@
+
+### Relevant Articles:
+
+- [Java Streams vs Vavr Streams](http://www.baeldung.com/vavr-java-streams)
+