Merge branch 'master' into core-java-move-1

algorithms-sorting/src/main/java/com/baeldung/algorithms/radixsort/RadixSort.java

@@ -29,7 +29,7 @@ public class RadixSort {
             frequency[digit]++;
         }
 
-        for (int i = 1; i < 10; i++) {
+        for (int i = 1; i < range; i++) {
             frequency[i] += frequency[i - 1];
         }
 

algorithms-sorting/src/test/java/com/baeldung/algorithms/radixsort/RadixSortUnitTest.java

@@ -7,7 +7,7 @@ import org.junit.Test;
 public class RadixSortUnitTest {
 
     @Test
-    public void givenUnsortedArrayWhenRadixSortThenArraySorted() {
+    public void givenUnsortedArray_whenRadixSort_thenArraySorted() {
         int[] numbers = { 387, 468, 134, 123, 68, 221, 769, 37, 7 };
         RadixSort.sort(numbers);
         int[] numbersSorted = { 7, 37, 68, 123, 134, 221, 387, 468, 769 };

apache-shiro/pom.xml

@@ -38,17 +38,6 @@
             <artifactId>jcl-over-slf4j</artifactId>
             <scope>runtime</scope>
         </dependency>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-log4j12</artifactId>
-            <scope>runtime</scope>
-        </dependency>
-        <dependency>
-            <groupId>log4j</groupId>
-            <artifactId>log4j</artifactId>
-            <version>${log4j-version}</version>
-            <scope>runtime</scope>
-        </dependency>
     </dependencies>
 
     <properties>

apache-shiro/src/main/java/com/baeldung/controllers/ShiroSpringController.java

@@ -18,22 +18,17 @@ import javax.servlet.http.HttpServletRequest;
 @Controller
 public class ShiroSpringController {
 
-
-
     @GetMapping("/")
     public String index() {
        return "index";
     }
 
-
     @RequestMapping( value = "/login", method = {RequestMethod.GET, RequestMethod.POST})
     public String login(HttpServletRequest req, UserCredentials cred, RedirectAttributes attr) {
 
       if(req.getMethod().equals(RequestMethod.GET.toString())) {
         return "login";
-      }
-      else {
-
+      } else {
         Subject subject = SecurityUtils.getSubject();
 
         if(!subject.isAuthenticated()) {

apache-shiro/src/main/java/com/baeldung/shiro/permissions/custom/Main.java

@@ -0,0 +1,68 @@
+package com.baeldung.shiro.permissions.custom;
+
+import com.baeldung.MyCustomRealm;
+import org.apache.shiro.SecurityUtils;
+import org.apache.shiro.authc.*;
+import org.apache.shiro.config.Ini;
+import org.apache.shiro.mgt.DefaultSecurityManager;
+import org.apache.shiro.mgt.SecurityManager;
+import org.apache.shiro.realm.Realm;
+import org.apache.shiro.realm.text.IniRealm;
+import org.apache.shiro.session.Session;
+import org.apache.shiro.subject.Subject;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class Main {
+
+    private static final transient Logger log = LoggerFactory.getLogger(Main.class);
+
+    public static void main(String[] args) {
+
+        IniRealm realm = new IniRealm();
+        Ini ini = Ini.fromResourcePath(Main.class.getResource("/com/baeldung/shiro/permissions/custom/shiro.ini").getPath());
+        realm.setIni(ini);
+        realm.setPermissionResolver(new PathPermissionResolver());
+        realm.init();
+        SecurityManager securityManager = new DefaultSecurityManager(realm);
+
+        SecurityUtils.setSecurityManager(securityManager);
+        Subject currentUser = SecurityUtils.getSubject();
+
+        if (!currentUser.isAuthenticated()) {
+          UsernamePasswordToken token = new UsernamePasswordToken("paul.reader", "password4");
+          token.setRememberMe(true);
+          try {
+              currentUser.login(token);
+          } catch (UnknownAccountException uae) {
+              log.error("Username Not Found!", uae);
+          } catch (IncorrectCredentialsException ice) {
+              log.error("Invalid Credentials!", ice);
+          } catch (LockedAccountException lae) {
+              log.error("Your Account is Locked!", lae);
+          } catch (AuthenticationException ae) {
+              log.error("Unexpected Error!", ae);
+          }
+        }
+
+        log.info("User [" + currentUser.getPrincipal() + "] logged in successfully.");
+
+        if (currentUser.hasRole("admin")) {
+            log.info("Welcome Admin");
+        } else if(currentUser.hasRole("editor")) {
+            log.info("Welcome, Editor!");
+        } else if(currentUser.hasRole("author")) {
+            log.info("Welcome, Author");
+        } else {
+            log.info("Welcome, Guest");
+        }
+
+        if(currentUser.isPermitted("/articles/drafts/new-article")) {
+            log.info("You can access articles");
+        } else {
+            log.info("You cannot access articles!");
+        }
+        currentUser.logout();
+    }
+
+}

apache-shiro/src/main/java/com/baeldung/shiro/permissions/custom/PathPermission.java

@@ -0,0 +1,22 @@
+package com.baeldung.shiro.permissions.custom;
+
+import org.apache.shiro.authz.Permission;
+
+import java.nio.file.Path;
+
+public class PathPermission implements Permission {
+
+    private final Path path;
+
+    public PathPermission(Path path) {
+        this.path = path;
+    }
+
+    @Override
+    public boolean implies(Permission p) {
+        if(p instanceof PathPermission) {
+            return ((PathPermission) p).path.startsWith(path);
+        }
+        return false;
+    }
+}

apache-shiro/src/main/java/com/baeldung/shiro/permissions/custom/PathPermissionResolver.java

@@ -0,0 +1,13 @@
+package com.baeldung.shiro.permissions.custom;
+
+import org.apache.shiro.authz.Permission;
+import org.apache.shiro.authz.permission.PermissionResolver;
+
+import java.nio.file.Paths;
+
+public class PathPermissionResolver implements PermissionResolver {
+    @Override
+    public Permission resolvePermission(String permissionString) {
+        return new PathPermission(Paths.get(permissionString));
+    }
+}

apache-shiro/src/main/resources/com/baeldung/shiro/permissions/custom/shiro.ini

@@ -0,0 +1,10 @@
+[users]
+jane.admin = password, admin
+john.editor = password2, editor
+zoe.author = password3, author
+paul.reader = password4
+
+[roles]
+admin = /
+editor = /articles
+author = /articles/drafts

core-java-modules/core-java-collections-list-2/src/test/java/com/baeldung/java/listInitialization/ListInitializationUnitTest.java

@@ -42,7 +42,7 @@ public class ListInitializationUnitTest {
     }
 
     @Test
-    public void givenArrayAsList_whenCreated_thenShareReference() {
+    public void givenArraysAsList_whenCreated_thenShareReference() {
         String[] array = { "foo", "bar" };
         List<String> list = Arrays.asList(array);
         array[0] = "baz";

core-java-modules/core-java-concurrency-2/.gitignore

@@ -0,0 +1,26 @@
+*.class
+
+0.*
+
+#folders#
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+.resourceCache
+
+# Packaged files #
+*.jar
+*.war
+*.ear
+
+# Files generated by integration tests
+*.txt
+backup-pom.xml
+/bin/
+/temp
+
+#IntelliJ specific
+.idea/
+*.iml

core-java-modules/core-java-concurrency-2/README.md

@@ -0,0 +1,7 @@
+=========
+
+## Core Java Concurrency 2 Examples
+
+### Relevant Articles: 
+- [Using a Mutex Object in Java](https://www.baeldung.com/java-mutex)
+

core-java-modules/core-java-concurrency-2/pom.xml

@@ -0,0 +1,27 @@
+<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-concurrency-2</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <name>core-java-concurrency-2</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-java</relativePath>
+    </parent>
+
+    <build>
+        <finalName>core-java-concurrency-2</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+    </build>
+
+</project>

core-java-modules/core-java-concurrency-2/src/main/resources/logback.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <logger name="org.springframework" level="WARN" />
+    <logger name="org.springframework.transaction" level="WARN" />
+
+    <!-- in order to debug some marshalling issues, this needs to be TRACE -->
+    <logger name="org.springframework.web.servlet.mvc" level="WARN" />
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

core-java-modules/core-java-concurrency-2/src/test/resources/.gitignore

@@ -0,0 +1,13 @@
+*.class
+
+#folders#
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+
+# Packaged files #
+*.jar
+*.war
+*.ear

core-java-modules/core-java-io/src/test/java/com/baeldung/readfile/FileOperationsManualTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.file;
+package com.baeldung.readfile;
 
 import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.IOUtils;

core-java-modules/core-java-jvm/src/main/java/com/baeldung/systemgc/DemoApplication.java

@@ -0,0 +1,33 @@
+package com.baeldung.systemgc;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Scanner;
+
+import static java.util.UUID.randomUUID;
+
+public class DemoApplication {
+
+    private static final Map<String, String> cache = new HashMap<String, String>();
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        while (scanner.hasNext()) {
+            final String next = scanner.next();
+            if ("fill".equals(next)) {
+                for (int i = 0; i < 1000000; i++) {
+                    cache.put(randomUUID().toString(), randomUUID().toString());
+                }
+            } else if ("invalidate".equals(next)) {
+                cache.clear();
+            } else if ("gc".equals(next)) {
+                System.gc();
+            } else if ("exit".equals(next)) {
+                System.exit(0);
+            } else {
+                System.out.println("unknown");
+            }
+        }
+    }
+}

core-java-modules/core-java-lang-oop-2/README.md

@@ -7,3 +7,9 @@
 - [Cannot Reference “X” Before Supertype Constructor Has Been Called](https://www.baeldung.com/java-cannot-reference-x-before-supertype-constructor-error)
 - [Anonymous Classes in Java](https://www.baeldung.com/java-anonymous-classes)
 - [Raw Types in Java](https://www.baeldung.com/raw-types-java)
+- [Java ‘private’ Access Modifier](https://www.baeldung.com/java-private-keyword)
+- [Marker Interfaces in Java](https://www.baeldung.com/java-marker-interfaces)
+- [Java equals() and hashCode() Contracts](https://www.baeldung.com/java-equals-hashcode-contracts)
+- [Immutable Objects in Java](http://www.baeldung.com/java-immutable-object)
+- [Inheritance and Composition (Is-a vs Has-a relationship) in Java](http://www.baeldung.com/java-inheritance-composition)
+- [A Guide to Constructors in Java](https://www.baeldung.com/java-constructors)

core-java-modules/core-java-lang-oop-2/pom.xml

@@ -15,16 +15,26 @@
     </parent>
 
 	<dependencies>
+        <!-- test scoped -->
         <dependency>
-			<groupId>com.h2database</groupId>
-			<artifactId>h2</artifactId>
-			<version>${h2.version}</version>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj-core.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>nl.jqno.equalsverifier</groupId>
+            <artifactId>equalsverifier</artifactId>
+            <version>${equalsverifier.version}</version>
             <scope>test</scope>
         </dependency>
 	</dependencies>
 
     <properties>
         <h2.version>1.4.199</h2.version>
+        <!-- testing -->
+        <assertj-core.version>3.10.0</assertj-core.version>
+        <equalsverifier.version>3.0.3</equalsverifier.version>
     </properties>
     
     <build>

core-java-modules/core-java-lang-oop-2/src/main/java/com/baeldung/basicmethods/PersonName.java

@@ -0,0 +1,37 @@
+package com.baeldung.basicmethods;
+
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+public class PersonName {
+
+    public String getName(String firstName, String lastName) throws RuntimeException {
+        return firstName + " " + lastName;
+    }
+
+    public String getName(String firstName, String middleName, String lastName) {
+        if (!middleName.equals("")) {
+            return firstName + " " + lastName;
+        }
+        return firstName + " " + middleName + " " + lastName;
+    }
+
+    public void printFullName(String firstName, String lastName) {
+        System.out.println(firstName + " " + lastName);
+    }
+
+    public void writeName(String name) throws IOException {
+        PrintWriter out = new PrintWriter(new FileWriter("OutFile.txt"));
+        out.println("Name: " + name);
+        out.close();
+    }
+
+    public static String getNameStatic(String firstName, String lastName) {
+        return firstName + " " + lastName;
+    }
+
+    public static void callToStaticMethod() {
+        System.out.println("Name is: " + PersonName.getNameStatic("Alan", "Turing"));
+    }
+}

core-java-modules/core-java-lang-oop-2/src/main/java/com/baeldung/inheritancecomposition/application/Application.java

@@ -1,12 +1,6 @@
 package com.baeldung.inheritancecomposition.application;
 
-import com.baeldung.inheritancecomposition.model.Actress;
-import com.baeldung.inheritancecomposition.model.Computer;
-import com.baeldung.inheritancecomposition.model.StandardMemory;
-import com.baeldung.inheritancecomposition.model.Person;
-import com.baeldung.inheritancecomposition.model.StandardProcessor;
-import com.baeldung.inheritancecomposition.model.StandardSoundCard;
-import com.baeldung.inheritancecomposition.model.Waitress;
+import com.baeldung.inheritancecomposition.model.*;
 
 public class Application {
     

core-java-modules/core-java-lang-oop-2/src/test/java/com/baeldung/constructors/ConstructorUnitTest.java

@@ -1,11 +1,9 @@
 package com.baeldung.constructors;
 
-import com.google.common.collect.Comparators;
 import org.junit.Test;
 
 import java.time.LocalDateTime;
 import java.time.Month;
-import java.util.ArrayList;
 import java.util.logging.Logger;
 
 import static org.assertj.core.api.Assertions.*;

core-java-modules/core-java-lang-oop-2/src/test/java/com/baeldung/equalshashcode/MoneyUnitTest.java

@@ -1,10 +1,10 @@
 package com.baeldung.equalshashcode;
 
-import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.assertFalse;
-
 import org.junit.Test;
 
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
 public class MoneyUnitTest {
 
     @Test

core-java-modules/core-java-lang-oop-2/src/test/java/com/baeldung/equalshashcode/TeamUnitTest.java

@@ -1,14 +1,13 @@
 package com.baeldung.equalshashcode;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
+import nl.jqno.equalsverifier.EqualsVerifier;
+import org.junit.Test;
 
 import java.util.HashMap;
 import java.util.Map;
 
-import org.junit.Test;
-
-import nl.jqno.equalsverifier.EqualsVerifier;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 
 public class TeamUnitTest {
 

core-java-modules/core-java-lang-oop-2/src/test/java/com/baeldung/equalshashcode/entities/ComplexClassUnitTest.java

@@ -1,13 +1,11 @@
 package com.baeldung.equalshashcode.entities;
 
-import java.util.ArrayList;
-import java.util.HashSet;
-import java.util.List;
-
 import org.junit.Assert;
 import org.junit.Test;
 
-import com.baeldung.equalshashcode.entities.ComplexClass;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
 
 public class ComplexClassUnitTest {
 

core-java-modules/core-java-lang-oop-2/src/test/java/com/baeldung/equalshashcode/entities/SquareClassUnitTest.java

@@ -1,11 +1,9 @@
 package com.baeldung.equalshashcode.entities;
 
-import java.awt.Color;
-
 import org.junit.Assert;
 import org.junit.Test;
 
-import com.baeldung.equalshashcode.entities.Square;
+import java.awt.*;
 
 public class SquareClassUnitTest {
 

core-java-modules/core-java-lang-oop-2/src/test/java/com/baeldung/immutableobjects/ImmutableObjectsUnitTest.java

@@ -1,11 +1,11 @@
 package com.baeldung.immutableobjects;
 
-import static org.junit.Assert.assertEquals;
+import org.junit.Test;
 
 import java.util.ArrayList;
 import java.util.List;
 
-import org.junit.Test;
+import static org.junit.Assert.assertEquals;
 
 public class ImmutableObjectsUnitTest {
 

core-java-modules/core-java-lang-oop-2/src/test/java/com/baeldung/inheritancecomposition/ActressUnitTest.java

@@ -1,8 +1,9 @@
-package com.baeldung.inheritancecomposition.test;
+package com.baeldung.inheritancecomposition;
 
 import com.baeldung.inheritancecomposition.model.Actress;
 import org.junit.BeforeClass;
 import org.junit.Test;
+
 import static org.assertj.core.api.Assertions.*;
 
 public class ActressUnitTest {

core-java-modules/core-java-lang-oop-2/src/test/java/com/baeldung/inheritancecomposition/CompositionUnitTest.java

@@ -1,15 +1,12 @@
-package com.baeldung.inheritancecomposition.test;
+package com.baeldung.inheritancecomposition;
 
-import com.baeldung.inheritancecomposition.model.Computer;
-import com.baeldung.inheritancecomposition.model.Memory;
-import com.baeldung.inheritancecomposition.model.Processor;
-import com.baeldung.inheritancecomposition.model.StandardMemory;
-import com.baeldung.inheritancecomposition.model.StandardProcessor;
-import com.baeldung.inheritancecomposition.model.StandardSoundCard;
-import java.util.Optional;
-import static org.assertj.core.api.Assertions.assertThat;
+import com.baeldung.inheritancecomposition.model.*;
 import org.junit.Test;
 
+import java.util.Optional;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
 public class CompositionUnitTest {
     
     

core-java-modules/core-java-lang-oop-2/src/test/java/com/baeldung/inheritancecomposition/InheritanceUnitTest.java

@@ -1,11 +1,12 @@
-package com.baeldung.inheritancecomposition.test;
+package com.baeldung.inheritancecomposition;
 
 import com.baeldung.inheritancecomposition.model.Actress;
 import com.baeldung.inheritancecomposition.model.Person;
 import com.baeldung.inheritancecomposition.model.Waitress;
-import static org.assertj.core.api.Assertions.assertThat;
 import org.junit.Test;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 public class InheritanceUnitTest {
     
     @Test

core-java-modules/core-java-lang-oop-2/src/test/java/com/baeldung/inheritancecomposition/PersonUnitTest.java

@@ -1,8 +1,9 @@
-package com.baeldung.inheritancecomposition.test;
+package com.baeldung.inheritancecomposition;
 
 import com.baeldung.inheritancecomposition.model.Person;
 import org.junit.BeforeClass;
 import org.junit.Test;
+
 import static org.assertj.core.api.Assertions.*;
 
 public class PersonUnitTest {

core-java-modules/core-java-lang-oop-2/src/test/java/com/baeldung/inheritancecomposition/WaitressUnitTest.java

@@ -1,8 +1,9 @@
-package com.baeldung.inheritancecomposition.test;
+package com.baeldung.inheritancecomposition;
 
 import com.baeldung.inheritancecomposition.model.Waitress;
 import org.junit.BeforeClass;
 import org.junit.Test;
+
 import static org.assertj.core.api.Assertions.*;
 
 public class WaitressUnitTest {

core-java-modules/core-java-lang-oop-2/src/test/java/com/baeldung/markerinterface/MarkerInterfaceUnitTest.java

@@ -1,9 +1,9 @@
 package com.baeldung.markerinterface;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
-
 import org.junit.jupiter.api.Test;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
 public class MarkerInterfaceUnitTest {
 
     @Test

core-java-modules/core-java-lang-oop-3/.gitignore

@@ -0,0 +1,26 @@
+*.class
+
+0.*
+
+#folders#
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+.resourceCache
+
+# Packaged files #
+*.jar
+*.war
+*.ear
+
+# Files generated by integration tests
+*.txt
+backup-pom.xml
+/bin/
+/temp
+
+#IntelliJ specific
+.idea/
+*.iml

core-java-modules/core-java-lang-oop-3/README.md

@@ -0,0 +1,11 @@
+=========
+
+## Core Java Lang OOP 3 Cookbooks and Examples
+
+### Relevant Articles: 
+- [Pass-By-Value as a Parameter Passing Mechanism in Java](http://www.baeldung.com/java-pass-by-value-or-pass-by-reference)
+- [Access Modifiers in Java](http://www.baeldung.com/java-access-modifiers)
+- [Guide to the super Java Keyword](http://www.baeldung.com/java-super)
+- [Guide to the this Java Keyword](http://www.baeldung.com/java-this)
+- [Java Public Access Modifier](https://www.baeldung.com/java-public-keyword)
+- [Composition, Aggregation and Association in Java](https://www.baeldung.com/java-composition-aggregation-association)

core-java-modules/core-java-lang-oop-3/pom.xml

@@ -0,0 +1,26 @@
+<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-lang-oop-3</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <name>core-java-lang-oop-3</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-java</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <version>${h2.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+</project>

core-java-modules/core-java-lang-oop-3/src/test/java/com/baeldung/accessmodifiers/PublicAccessModifierUnitTest.java

@@ -1,14 +1,11 @@
 package com.baeldung.accessmodifiers;
 
+import com.baeldung.accessmodifiers.publicmodifier.ListOfThree;
+import com.baeldung.accessmodifiers.publicmodifier.Student;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.TestInstance;
 import org.junit.jupiter.api.TestInstance.Lifecycle;
-import com.baeldung.accessmodifiers.publicmodifier.ListOfThree;
-import com.baeldung.accessmodifiers.publicmodifier.Student;
 
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertTrue;
-import static org.junit.jupiter.api.Assertions.assertEquals;
 import java.math.BigDecimal;
 import java.sql.Connection;
 import java.sql.DriverManager;
@@ -17,6 +14,10 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
 @TestInstance(Lifecycle.PER_CLASS)
 public class PublicAccessModifierUnitTest {
 

core-java-modules/core-java-lang-oop/README.md

@@ -12,13 +12,4 @@
 - [Object Type Casting in Java](http://www.baeldung.com/java-type-casting)
 - [The “final” Keyword in Java](http://www.baeldung.com/java-final)
 - [Type Erasure in Java Explained](http://www.baeldung.com/java-type-erasure)
-- [Pass-By-Value as a Parameter Passing Mechanism in Java](http://www.baeldung.com/java-pass-by-value-or-pass-by-reference)
 - [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)
-- [Guide to the super Java Keyword](http://www.baeldung.com/java-super)
-- [Guide to the this Java Keyword](http://www.baeldung.com/java-this)
-- [Immutable Objects in Java](http://www.baeldung.com/java-immutable-object)
-- [Inheritance and Composition (Is-a vs Has-a relationship) in Java](http://www.baeldung.com/java-inheritance-composition)
-- [A Guide to Constructors in Java](https://www.baeldung.com/java-constructors)
-- [Java equals() and hashCode() Contracts](https://www.baeldung.com/java-equals-hashcode-contracts)
-- [Marker Interfaces in Java](https://www.baeldung.com/java-marker-interfaces)

core-java-modules/core-java-lang-oop/pom.xml

@@ -56,12 +56,6 @@
             <version>${assertj-core.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>nl.jqno.equalsverifier</groupId>
-            <artifactId>equalsverifier</artifactId>
-            <version>${equalsverifier.version}</version>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>
@@ -78,7 +72,6 @@
         <gson.version>2.8.2</gson.version>
         <!-- testing -->
         <assertj-core.version>3.10.0</assertj-core.version>
-        <equalsverifier.version>3.0.3</equalsverifier.version>
     </properties>
 
 </project>

core-java-modules/core-java-networking-2/README.md

@@ -3,3 +3,5 @@
 - [Checking if a URL Exists in Java](https://www.baeldung.com/java-check-url-exists)
 - [Making a JSON POST Request With HttpURLConnection](https://www.baeldung.com/httpurlconnection-post)
 - [Using Curl in Java](https://www.baeldung.com/java-curl)
+- [Do a Simple HTTP Request in Java](http://www.baeldung.com/java-http-request)
+- [Sending Emails with Java](http://www.baeldung.com/java-email)