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

apache-shiro/pom.xml

@@ -10,9 +10,9 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-boot-1</artifactId>
+        <artifactId>parent-boot-2</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../parent-boot-1</relativePath>
+        <relativePath>../parent-boot-2</relativePath>
     </parent>
 
     <dependencies>

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

@@ -1,11 +1,14 @@
 package com.baeldung;
 
 import org.apache.shiro.SecurityUtils;
-import org.apache.shiro.authc.*;
+import org.apache.shiro.authc.AuthenticationException;
+import org.apache.shiro.authc.IncorrectCredentialsException;
+import org.apache.shiro.authc.LockedAccountException;
+import org.apache.shiro.authc.UnknownAccountException;
+import org.apache.shiro.authc.UsernamePasswordToken;
 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;

apache-shiro/src/main/java/com/baeldung/MyCustomRealm.java

@@ -1,16 +1,24 @@
 package com.baeldung;
 
-import org.apache.shiro.authc.*;
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.shiro.authc.AuthenticationException;
+import org.apache.shiro.authc.AuthenticationInfo;
+import org.apache.shiro.authc.AuthenticationToken;
+import org.apache.shiro.authc.SimpleAuthenticationInfo;
+import org.apache.shiro.authc.UnknownAccountException;
+import org.apache.shiro.authc.UsernamePasswordToken;
 import org.apache.shiro.authz.AuthorizationInfo;
 import org.apache.shiro.authz.SimpleAuthorizationInfo;
 import org.apache.shiro.realm.jdbc.JdbcRealm;
 import org.apache.shiro.subject.PrincipalCollection;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import java.sql.Connection;
-import java.sql.SQLException;
-import java.util.*;
 
 public class MyCustomRealm extends JdbcRealm {
 

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

@@ -1,14 +1,15 @@
 package com.baeldung.shiro.permissions.custom;
 
-import com.baeldung.MyCustomRealm;
 import org.apache.shiro.SecurityUtils;
-import org.apache.shiro.authc.*;
+import org.apache.shiro.authc.AuthenticationException;
+import org.apache.shiro.authc.IncorrectCredentialsException;
+import org.apache.shiro.authc.LockedAccountException;
+import org.apache.shiro.authc.UnknownAccountException;
+import org.apache.shiro.authc.UsernamePasswordToken;
 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;

atomikos/README.md

@@ -1,7 +1,6 @@
 ## Atomikos
-
 This module contains articles about Atomikos
 
 ### Relevant Articles: 
 
-- [Guide Transactions Using Atomikos]()
+- [A Guide to Atomikos](https://www.baeldung.com/java-atomikos)

bazel/bazelapp/README.md

@@ -1,3 +0,0 @@
-### Relevant Articles:
-
-- [Building Java Applications with Bazel](https://www.baeldung.com/bazel-build-tool)

core-groovy/README.md

@@ -12,4 +12,5 @@ This module contains articles about core Groovy concepts
 - [Closures in Groovy](https://www.baeldung.com/groovy-closures)
 - [Converting a String to a Date in Groovy](https://www.baeldung.com/groovy-string-to-date)
 - [Guide to I/O in Groovy](https://www.baeldung.com/groovy-io)
-- [[More -->]](/core-groovy-2)
+- [Convert String to Integer in Groovy](https://www.baeldung.com/groovy-convert-string-to-integer)
+- [[More -->]](/core-groovy-2)

core-java-modules/core-java-collections-maps-3/README.md

@@ -5,4 +5,5 @@ This module contains articles about Map data structures in Java.
 ### Relevant Articles: 
 - [Java TreeMap vs HashMap](https://www.baeldung.com/java-treemap-vs-hashmap)
 - [Comparing Two HashMaps in Java](https://www.baeldung.com/java-compare-hashmaps)
+- [The Map.computeIfAbsent() Method](https://www.baeldung.com/java-map-computeifabsent)
 - More articles: [[<-- prev]](/core-java-modules/core-java-collections-maps-2)

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

@@ -4,5 +4,5 @@
 
 ### Relevant Articles: 
 - [Using a Mutex Object in Java](https://www.baeldung.com/java-mutex)
-- [Testing Multi-Threaded Code in Java] (https://www.baeldung.com/java-testing-multithreaded)
+- [Testing Multi-Threaded Code in Java](https://www.baeldung.com/java-testing-multithreaded)
 

core-java-modules/core-java-concurrency-advanced-3/src/main/java/com/baeldung/lockfree/NonBlockingQueue.java

@@ -0,0 +1,81 @@
+package com.baeldung.lockfree;
+
+import java.util.NoSuchElementException;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicReference;
+
+public class NonBlockingQueue<T> {
+
+    private final AtomicReference<Node<T>> head, tail;
+    private final AtomicInteger size;
+
+    public NonBlockingQueue() {
+        head = new AtomicReference<>(null);
+        tail = new AtomicReference<>(null);
+        size = new AtomicInteger();
+        size.set(0);
+    }
+
+    public void add(T element) {
+        if (element == null) {
+            throw new NullPointerException();
+        }
+
+        Node<T> node = new Node<>(element);
+        Node<T> currentTail;
+        do {
+            currentTail = tail.get();
+            node.setPrevious(currentTail);
+        } while(!tail.compareAndSet(currentTail, node));
+
+        if(node.previous != null) {
+            node.previous.next = node;
+        }
+
+        head.compareAndSet(null, node); //if we are inserting the first element
+        size.incrementAndGet();
+    }
+
+    public T get() {
+        if(head.get() == null) {
+            throw new NoSuchElementException();
+        }
+
+        Node<T> currentHead;
+        Node<T> nextNode;
+        do {
+            currentHead = head.get();
+            nextNode = currentHead.getNext();
+        } while(!head.compareAndSet(currentHead, nextNode));
+
+        size.decrementAndGet();
+        return currentHead.getValue();
+    }
+
+    public int size() {
+        return this.size.get();
+    }
+
+    private class Node<T> {
+        private final T value;
+        private volatile Node<T> next;
+        private volatile Node<T> previous;
+
+        public Node(T value) {
+            this.value = value;
+            this.next = null;
+        }
+
+        public T getValue() {
+            return value;
+        }
+
+        public Node<T> getNext() {
+            return next;
+        }
+
+        public void setPrevious(Node<T> previous) {
+            this.previous = previous;
+        }
+    }
+}

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

@@ -11,4 +11,5 @@ This module contains articles about networking in Java
 - [Sending Emails with Java](https://www.baeldung.com/java-email)
 - [Authentication with HttpUrlConnection](https://www.baeldung.com/java-http-url-connection)
 - [Download a File from an URL in Java](https://www.baeldung.com/java-download-file)
+- [Handling java.net.ConnectException](https://www.baeldung.com/java-net-connectexception)
 - [[<-- Prev]](/core-java-modules/core-java-networking)

core-java-modules/core-java-regex/src/test/java/com/baeldung/regex/RegexUnitTest.java

@@ -26,7 +26,6 @@ public class RegexUnitTest {
         while (matcher.find())
             matches++;
         assertEquals(matches, 2);
-
     }
 
     @Test
@@ -452,7 +451,6 @@ public class RegexUnitTest {
         Matcher matcher = pattern.matcher("dogs are friendly");
         assertTrue(matcher.lookingAt());
         assertFalse(matcher.matches());
-
     }
 
     @Test
@@ -460,7 +458,6 @@ public class RegexUnitTest {
         Pattern pattern = Pattern.compile("dog");
         Matcher matcher = pattern.matcher("dog");
         assertTrue(matcher.matches());
-
     }
 
     @Test
@@ -469,7 +466,6 @@ public class RegexUnitTest {
         Matcher matcher = pattern.matcher("dogs are domestic animals, dogs are friendly");
         String newStr = matcher.replaceFirst("cat");
         assertEquals("cats are domestic animals, dogs are friendly", newStr);
-
     }
 
     @Test
@@ -478,7 +474,6 @@ public class RegexUnitTest {
         Matcher matcher = pattern.matcher("dogs are domestic animals, dogs are friendly");
         String newStr = matcher.replaceAll("cat");
         assertEquals("cats are domestic animals, cats are friendly", newStr);
-
     }
 
     public synchronized static int runTest(String regex, String text) {

core-java-modules/core-java-regex/src/test/java/com/baeldung/regex/phonenumbers/PhoneNumbersRegexUnitTest.java

@@ -0,0 +1,129 @@
+package com.baeldung.regex.phonenumbers;
+
+import static org.junit.Assert.*;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.junit.Test;
+
+public class PhoneNumbersRegexUnitTest {
+
+    @Test
+    public void whenMatchesTenDigitsNumber_thenCorrect() {
+        Pattern pattern = Pattern.compile("^\\d{10}$");
+        Matcher matcher = pattern.matcher("2055550125");
+        assertTrue(matcher.matches());
+    }
+    
+    @Test
+    public void whenMOreThanTenDigits_thenNotCorrect() {
+        Pattern pattern = Pattern.compile("^\\d{10}$");
+        Matcher matcher = pattern.matcher("20555501251");
+        assertFalse(matcher.matches());
+    }
+
+    @Test
+    public void whenMatchesTenDigitsNumberWhitespacesDotHyphen_thenCorrect() {
+        Pattern pattern = Pattern.compile("^(\\d{3}[- .]?){2}\\d{4}$");
+        Matcher matcher = pattern.matcher("202 555 0125");
+        assertTrue(matcher.matches());
+    }
+    
+    @Test
+    public void whenIncludesBracket_thenNotCorrect() {
+        Pattern pattern = Pattern.compile("^(\\d{3}[- .]?){2}\\d{4}$");
+        Matcher matcher = pattern.matcher("202]555 0125");
+        assertFalse(matcher.matches());
+    }
+    
+    @Test
+    public void whenNotStartsWithBatchesOfThreeDigits_thenNotCorrect() {
+        Pattern pattern = Pattern.compile("^(\\d{3}[- .]?){2}\\d{4}$");
+        Matcher matcher = pattern.matcher("2021 555 0125");
+        assertFalse(matcher.matches());
+    }
+    
+    @Test
+    public void whenLastPartWithNoFourDigits_thenNotCorrect() {
+        Pattern pattern = Pattern.compile("^(\\d{3}[- .]?){2}\\d{4}$");
+        Matcher matcher = pattern.matcher("202 555 012");
+        assertFalse(matcher.matches());
+    }
+
+    @Test
+    public void whenMatchesTenDigitsNumberParenthesis_thenCorrect() {
+        Pattern pattern = Pattern.compile("^((\\(\\d{3}\\))|\\d{3})[- .]?\\d{3}[- .]?\\d{4}$");
+        Matcher matcher = pattern.matcher("(202) 555-0125");
+        assertTrue(matcher.matches());
+    }
+
+    @Test
+    public void whenJustOpeningParenthesis_thenNotCorrect() {
+        Pattern pattern = Pattern.compile("^((\\(\\d{3}\\))|\\d{3})[- .]?\\d{3}[- .]?\\d{4}$");
+        Matcher matcher = pattern.matcher("(202 555-0125");
+        assertFalse(matcher.matches());
+    }
+
+    @Test
+    public void whenJustClosingParenthesis_thenNotCorrect() {
+        Pattern pattern = Pattern.compile("^((\\(\\d{3}\\))|\\d{3})[- .]?\\d{3}[- .]?\\d{4}$");
+        Matcher matcher = pattern.matcher("202) 555-0125");
+        assertFalse(matcher.matches());
+    }
+
+    @Test
+    public void whenMatchesTenDigitsNumberPrefix_thenCorrect() {
+        Pattern pattern = Pattern.compile("^(\\+\\d{1,3}( )?)?((\\(\\d{3}\\))|\\d{3})[- .]?\\d{3}[- .]?\\d{4}$");
+        Matcher matcher = pattern.matcher("+111 (202) 555-0125");
+        assertTrue(matcher.matches());
+    }
+
+    @Test
+    public void whenIncorrectPrefix_thenNotCorrect() {
+        Pattern pattern = Pattern.compile("^(\\+\\d{1,3}( )?)?((\\(\\d{3}\\))|\\d{3})[- .]?\\d{3}[- .]?\\d{4}$");
+        Matcher matcher = pattern.matcher("-111 (202) 555-0125");
+        assertFalse(matcher.matches());
+    }
+
+    @Test
+    public void whenTooLongPrefix_thenNotCorrect() {
+        Pattern pattern = Pattern.compile("^(\\+\\d{1,3}( )?)?((\\(\\d{3}\\))|\\d{3})[- .]?\\d{3}[- .]?\\d{4}$");
+        Matcher matcher = pattern.matcher("+1111 (202) 555-0125");
+        assertFalse(matcher.matches());
+    }
+
+    @Test
+    public void whenMatchesPhoneNumber_thenCorrect() {
+        String patterns 
+          = "^(\\+\\d{1,3}( )?)?((\\(\\d{3}\\))|\\d{3})[- .]?\\d{3}[- .]?\\d{4}$"
+          + "|^(\\+\\d{1,3}( )?)?(\\d{3}[ ]?){2}\\d{3}$" 
+          + "|^(\\+\\d{1,3}( )?)?(\\d{3}[ ]?)(\\d{2}[ ]?){2}\\d{2}$";
+
+        String[] validPhoneNumbers 
+          = {"2055550125","202 555 0125", "(202) 555-0125", "+111 (202) 555-0125", "636 856 789", "+111 636 856 789", "636 85 67 89", "+111 636 85 67 89"};
+
+        Pattern pattern = Pattern.compile(patterns);
+        for(String phoneNumber : validPhoneNumbers) {
+            Matcher matcher = pattern.matcher(phoneNumber);
+            assertTrue(matcher.matches());
+        }
+    }
+
+    @Test
+    public void whenNotMatchesPhoneNumber_thenNotCorrect() {
+        String patterns 
+          = "^(\\+\\d{1,3}( )?)?((\\(\\d{3}\\))|\\d{3})[- .]?\\d{3}[- .]?\\d{4}$"
+          + "|^(\\+\\d{1,3}( )?)?(\\d{3}[ ]?){2}\\d{3}$" 
+          + "|^(\\+\\d{1,3}( )?)?(\\d{3}[ ]?)(\\d{2}[ ]?){2}\\d{2}$";
+
+        String[] invalidPhoneNumbers 
+          = {"20555501251","202]555 0125", "2021 555 012", "(202 555-0125", "202) 555-0125", "-111 (202) 555-0125", "+1111 (202) 555-0125", "636 85 789", "636 85 67 893"};
+
+        Pattern pattern = Pattern.compile(patterns);
+        for(String phoneNumber : invalidPhoneNumbers) {
+            Matcher matcher = pattern.matcher(phoneNumber);
+            assertFalse(matcher.matches());
+        }
+    }
+}

core-java-modules/core-java-streams-3/README.md

@@ -10,4 +10,5 @@ This module contains articles about the Stream API in Java.
 - [Primitive Type Streams in Java 8](https://www.baeldung.com/java-8-primitive-streams)
 - [Debugging Java 8 Streams with IntelliJ](https://www.baeldung.com/intellij-debugging-java-streams)
 - [Add BigDecimals using the Stream API](https://www.baeldung.com/java-stream-add-bigdecimals)
+- [Should We Close a Java Stream?](https://www.baeldung.com/java-stream-close)
 - More articles: [[<-- prev>]](/../core-java-streams-2)

core-kotlin-modules/core-kotlin-lang-2/src/test/kotlin/com/baeldung/late/LateInitUnitTest.kt

@@ -0,0 +1,22 @@
+package com.baeldung.late
+
+import org.junit.Test
+import kotlin.test.assertFalse
+import kotlin.test.assertTrue
+
+class LateInitUnitTest {
+
+    private lateinit var answer: String
+
+    @Test(expected = UninitializedPropertyAccessException::class)
+    fun givenLateInit_WhenNotInitialized_ShouldThrowAnException() {
+        answer.length
+    }
+
+    @Test
+    fun givenLateInit_TheIsInitialized_ReturnsTheInitializationStatus() {
+        assertFalse { this::answer.isInitialized }
+        answer = "42"
+        assertTrue { this::answer.isInitialized }
+    }
+}

java-collections-maps-3/README.md

@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [Java Map With Case-Insensitive Keys](https://www.baeldung.com/java-map-with-case-insensitive-keys)

libraries-2/README.md

@@ -18,5 +18,5 @@ Remember, for advanced libraries like [Jackson](/jackson) and [JUnit](/testing-m
 - [Guide to MapDB](https://www.baeldung.com/mapdb)
 - [A Guide to Apache Mesos](https://www.baeldung.com/apache-mesos)
 - [JasperReports with Spring](https://www.baeldung.com/spring-jasper)
-- More articles [[<-- prev]](/libraries)
+- More articles [[<-- prev]](/libraries) [[next -->]](/libraries-3)
 

libraries-3/README.md

@@ -17,3 +17,4 @@ Remember, for advanced libraries like [Jackson](/jackson) and [JUnit](/testing-m
 - [Using NullAway to Avoid NullPointerExceptions](https://www.baeldung.com/java-nullaway)
 - [Introduction to Alibaba Arthas](https://www.baeldung.com/java-alibaba-arthas-intro)
 - [Quick Guide to Spring Cloud Circuit Breaker](https://www.baeldung.com/spring-cloud-circuit-breaker)
+- More articles [[<-- prev]](/libraries-2) [[next -->]](/libraries-4)

libraries-4/README.md

@@ -0,0 +1,21 @@
+## Libraries-4
+
+This module contains articles about various Java libraries. 
+These are small libraries that are relatively easy to use and do not require any separate module of their own.
+
+The code examples related to different libraries are each in their own module.
+
+Remember, for advanced libraries like [Jackson](/jackson) and [JUnit](/testing-modules) we already have separate modules. Please make sure to have a look at the existing modules in such cases.
+
+### Relevant articles
+- [Quick Guide to RSS with Rome](https://www.baeldung.com/rome-rss)
+- [Introduction to PCollections](https://www.baeldung.com/java-pcollections)
+- [Introduction to Eclipse Collections](https://www.baeldung.com/eclipse-collections)
+- [DistinctBy in the Java Stream API](https://www.baeldung.com/java-streams-distinct-by)
+- [Introduction to NoException](https://www.baeldung.com/no-exception)
+- [Spring Yarg Integration](https://www.baeldung.com/spring-yarg)
+- [Delete a Directory Recursively in Java](https://www.baeldung.com/java-delete-directory)
+- [Guide to JDeferred](https://www.baeldung.com/jdeferred)
+- [Introduction to MBassador](https://www.baeldung.com/mbassador)
+- [Using Pairs in Java](https://www.baeldung.com/java-pairs)
+- More articles [[<-- prev]](/libraries-3) [[next -->]](/libraries-5)

libraries-4/pom.xml

@@ -0,0 +1,116 @@
+<?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">
+    <parent>
+        <artifactId>parent-modules</artifactId>
+        <groupId>com.baeldung</groupId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>libraries-4</artifactId>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.jdeferred</groupId>
+            <artifactId>jdeferred-core</artifactId>
+            <version>${jdeferred.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.eclipse.collections</groupId>
+            <artifactId>eclipse-collections</artifactId>
+            <version>${eclipse-collections.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.haulmont.yarg</groupId>
+            <artifactId>yarg</artifactId>
+            <version>${yarg.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>net.engio</groupId>
+            <artifactId>mbassador</artifactId>
+            <version>${mbassador.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.machinezoo.noexception</groupId>
+            <artifactId>noexception</artifactId>
+            <version>${noexception.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>rome</groupId>
+            <artifactId>rome</artifactId>
+            <version>${rome.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-web</artifactId>
+            <version>${spring.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.datanucleus</groupId>
+            <artifactId>javax.jdo</artifactId>
+            <version>${javax.jdo.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>servlet-api</artifactId>
+            <version>${javax.servlet.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.vavr</groupId>
+            <artifactId>vavr</artifactId>
+            <version>${vavr.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.pcollections</groupId>
+            <artifactId>pcollections</artifactId>
+            <version>${pcollections.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.awaitility</groupId>
+            <artifactId>awaitility</artifactId>
+            <version>${awaitility.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>one.util</groupId>
+            <artifactId>streamex</artifactId>
+            <version>${streamex.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>javax.el</groupId>
+            <artifactId>javax.el-api</artifactId>
+            <version>${javax.el.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.glassfish.web</groupId>
+            <artifactId>javax.el</artifactId>
+            <version>2.2.4</version>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <jdeferred.version>1.2.6</jdeferred.version>
+        <eclipse-collections.version>8.2.0</eclipse-collections.version>
+        <noexception.version>1.1.0</noexception.version>
+        <yarg.version>2.0.12</yarg.version>
+        <mbassador.version>1.3.1</mbassador.version>
+        <rome.version>1.0</rome.version>
+        <spring.version>4.3.8.RELEASE</spring.version>
+        <javax.servlet.version>2.5</javax.servlet.version>
+        <javax.jdo.version>3.2.0-m7</javax.jdo.version>
+        <vavr.version>0.9.0</vavr.version>
+        <assertj.version>3.6.2</assertj.version>
+        <pcollections.version>2.1.2</pcollections.version>
+        <awaitility.version>3.0.0</awaitility.version>
+        <streamex.version>0.6.5</streamex.version>
+        <javax.el.version>3.0.0</javax.el.version>
+    </properties>
+
+</project>

libraries-4/src/test/java/com/baeldung/eclipsecollections/ForEachPatternUnitTest.java

@@ -5,6 +5,7 @@ import static org.junit.Assert.assertEquals;
 import org.eclipse.collections.api.tuple.Pair;
 import org.eclipse.collections.impl.map.mutable.UnifiedMap;
 import org.eclipse.collections.impl.tuple.Tuples;
+import org.junit.Assert;
 import org.junit.Test;
 
 public class ForEachPatternUnitTest {
@@ -23,7 +24,7 @@ public class ForEachPatternUnitTest {
         }
 
         for (int i = 0; i < map.size(); i++) {
-            assertEquals("New Value", map.get(i + 1));
+            Assert.assertEquals("New Value", map.get(i + 1));
         }
     }
 }

libraries-4/src/test/java/com/baeldung/io/JavaDirectoryDeleteUnitTest.java

@@ -1,138 +1,138 @@
-package com.baeldung.java.io;
+package com.baeldung.io;
-
+
-import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.assertTrue;
-
+
-import java.io.File;
+import java.io.File;
-import java.io.IOException;
+import java.io.IOException;
-import java.nio.file.FileVisitResult;
+import java.nio.file.FileVisitResult;
-import java.nio.file.Files;
+import java.nio.file.Files;
-import java.nio.file.Path;
+import java.nio.file.Path;
-import java.nio.file.SimpleFileVisitor;
+import java.nio.file.SimpleFileVisitor;
-import java.nio.file.attribute.BasicFileAttributes;
+import java.nio.file.attribute.BasicFileAttributes;
-import java.util.Arrays;
+import java.util.Arrays;
-import java.util.Comparator;
+import java.util.Comparator;
-import java.util.List;
+import java.util.List;
-
+
-import org.apache.commons.io.FileUtils;
+import org.apache.commons.io.FileUtils;
-import org.junit.After;
+import org.junit.After;
-import org.junit.AfterClass;
+import org.junit.AfterClass;
-import org.junit.Before;
+import org.junit.Before;
-import org.junit.BeforeClass;
+import org.junit.BeforeClass;
-import org.junit.Test;
+import org.junit.Test;
-import org.springframework.util.FileSystemUtils;
+import org.springframework.util.FileSystemUtils;
-
+
-public class JavaDirectoryDeleteUnitTest {
+public class JavaDirectoryDeleteUnitTest {
-    private static Path TEMP_DIRECTORY;
+    private static Path TEMP_DIRECTORY;
-    private static final String DIRECTORY_NAME = "toBeDeleted";
+    private static final String DIRECTORY_NAME = "toBeDeleted";
-
+
-    private static final List<String> ALL_LINES = Arrays.asList("This is line 1", "This is line 2", "This is line 3", "This is line 4", "This is line 5", "This is line 6");
+    private static final List<String> ALL_LINES = Arrays.asList("This is line 1", "This is line 2", "This is line 3", "This is line 4", "This is line 5", "This is line 6");
-
+
-    @BeforeClass
+    @BeforeClass
-    public static void initializeTempDirectory() throws IOException {
+    public static void initializeTempDirectory() throws IOException {
-        TEMP_DIRECTORY = Files.createTempDirectory("tmpForJUnit");
+        TEMP_DIRECTORY = Files.createTempDirectory("tmpForJUnit");
-    }
+    }
-
+
-    @AfterClass
+    @AfterClass
-    public static void cleanTempDirectory() throws IOException {
+    public static void cleanTempDirectory() throws IOException {
-        FileUtils.deleteDirectory(TEMP_DIRECTORY.toFile());
+        FileUtils.deleteDirectory(TEMP_DIRECTORY.toFile());
-    }
+    }
-
+
-    @Before
+    @Before
-    public void setupDirectory() throws IOException {
+    public void setupDirectory() throws IOException {
-        Path tempPathForEachTest = Files.createDirectory(TEMP_DIRECTORY.resolve(DIRECTORY_NAME));
+        Path tempPathForEachTest = Files.createDirectory(TEMP_DIRECTORY.resolve(DIRECTORY_NAME));
-
+
-        // Create a directory structure
+        // Create a directory structure
-        Files.write(tempPathForEachTest.resolve("file1.txt"), ALL_LINES.subList(0, 2));
+        Files.write(tempPathForEachTest.resolve("file1.txt"), ALL_LINES.subList(0, 2));
-        Files.write(tempPathForEachTest.resolve("file2.txt"), ALL_LINES.subList(2, 4));
+        Files.write(tempPathForEachTest.resolve("file2.txt"), ALL_LINES.subList(2, 4));
-
+
-        Files.createDirectories(tempPathForEachTest.resolve("Empty"));
+        Files.createDirectories(tempPathForEachTest.resolve("Empty"));
-
+
-        Path aSubDir = Files.createDirectories(tempPathForEachTest.resolve("notEmpty"));
+        Path aSubDir = Files.createDirectories(tempPathForEachTest.resolve("notEmpty"));
-        Files.write(aSubDir.resolve("file3.txt"), ALL_LINES.subList(3, 5));
+        Files.write(aSubDir.resolve("file3.txt"), ALL_LINES.subList(3, 5));
-        Files.write(aSubDir.resolve("file4.txt"), ALL_LINES.subList(0, 3));
+        Files.write(aSubDir.resolve("file4.txt"), ALL_LINES.subList(0, 3));
-
+
-        aSubDir = Files.createDirectories(aSubDir.resolve("anotherSubDirectory"));
+        aSubDir = Files.createDirectories(aSubDir.resolve("anotherSubDirectory"));
-        Files.write(aSubDir.resolve("file5.txt"), ALL_LINES.subList(4, 5));
+        Files.write(aSubDir.resolve("file5.txt"), ALL_LINES.subList(4, 5));
-        Files.write(aSubDir.resolve("file6.txt"), ALL_LINES.subList(0, 2));
+        Files.write(aSubDir.resolve("file6.txt"), ALL_LINES.subList(0, 2));
-    }
+    }
-
+
-    @After
+    @After
-    public void checkAndCleanupIfRequired() throws IOException {
+    public void checkAndCleanupIfRequired() throws IOException {
-        Path pathToBeDeleted = TEMP_DIRECTORY.resolve(DIRECTORY_NAME);
+        Path pathToBeDeleted = TEMP_DIRECTORY.resolve(DIRECTORY_NAME);
-        if (Files.exists(pathToBeDeleted)) {
+        if (Files.exists(pathToBeDeleted)) {
-            FileUtils.deleteDirectory(pathToBeDeleted.toFile());
+            FileUtils.deleteDirectory(pathToBeDeleted.toFile());
-        }
+        }
-    }
+    }
-
+
-    private boolean deleteDirectory(File directoryToBeDeleted) {
+    private boolean deleteDirectory(File directoryToBeDeleted) {
-        File[] allContents = directoryToBeDeleted.listFiles();
+        File[] allContents = directoryToBeDeleted.listFiles();
-
+
-        if (allContents != null) {
+        if (allContents != null) {
-            for (File file : allContents) {
+            for (File file : allContents) {
-                deleteDirectory(file);
+                deleteDirectory(file);
-            }
+            }
-        }
+        }
-
+
-        return directoryToBeDeleted.delete();
+        return directoryToBeDeleted.delete();
-    }
+    }
-
+
-    @Test
+    @Test
-    public void givenDirectory_whenDeletedWithRecursion_thenIsGone() throws IOException {
+    public void givenDirectory_whenDeletedWithRecursion_thenIsGone() throws IOException {
-        Path pathToBeDeleted = TEMP_DIRECTORY.resolve(DIRECTORY_NAME);
+        Path pathToBeDeleted = TEMP_DIRECTORY.resolve(DIRECTORY_NAME);
-
+
-        boolean result = deleteDirectory(pathToBeDeleted.toFile());
+        boolean result = deleteDirectory(pathToBeDeleted.toFile());
-
+
-        assertTrue("Could not delete directory", result);
+        assertTrue("Could not delete directory", result);
-        assertFalse("Directory still exists", Files.exists(pathToBeDeleted));
+        assertFalse("Directory still exists", Files.exists(pathToBeDeleted));
-    }
+    }
-
+
-    @Test
+    @Test
-    public void givenDirectory_whenDeletedWithCommonsIOFileUtils_thenIsGone() throws IOException {
+    public void givenDirectory_whenDeletedWithCommonsIOFileUtils_thenIsGone() throws IOException {
-        Path pathToBeDeleted = TEMP_DIRECTORY.resolve(DIRECTORY_NAME);
+        Path pathToBeDeleted = TEMP_DIRECTORY.resolve(DIRECTORY_NAME);
-
+
-        FileUtils.deleteDirectory(pathToBeDeleted.toFile());
+        FileUtils.deleteDirectory(pathToBeDeleted.toFile());
-
+
-        assertFalse("Directory still exists", Files.exists(pathToBeDeleted));
+        assertFalse("Directory still exists", Files.exists(pathToBeDeleted));
-    }
+    }
-
+
-    @Test
+    @Test
-    public void givenDirectory_whenDeletedWithSpringFileSystemUtils_thenIsGone() throws IOException {
+    public void givenDirectory_whenDeletedWithSpringFileSystemUtils_thenIsGone() throws IOException {
-        Path pathToBeDeleted = TEMP_DIRECTORY.resolve(DIRECTORY_NAME);
+        Path pathToBeDeleted = TEMP_DIRECTORY.resolve(DIRECTORY_NAME);
-
+
-        boolean result = FileSystemUtils.deleteRecursively(pathToBeDeleted.toFile());
+        boolean result = FileSystemUtils.deleteRecursively(pathToBeDeleted.toFile());
-
+
-        assertTrue("Could not delete directory", result);
+        assertTrue("Could not delete directory", result);
-        assertFalse("Directory still exists", Files.exists(pathToBeDeleted));
+        assertFalse("Directory still exists", Files.exists(pathToBeDeleted));
-    }
+    }
-
+
-    @Test
+    @Test
-    public void givenDirectory_whenDeletedWithFilesWalk_thenIsGone() throws IOException {
+    public void givenDirectory_whenDeletedWithFilesWalk_thenIsGone() throws IOException {
-        Path pathToBeDeleted = TEMP_DIRECTORY.resolve(DIRECTORY_NAME);
+        Path pathToBeDeleted = TEMP_DIRECTORY.resolve(DIRECTORY_NAME);
-
+
-        Files.walk(pathToBeDeleted).sorted(Comparator.reverseOrder()).map(Path::toFile).forEach(File::delete);
+        Files.walk(pathToBeDeleted).sorted(Comparator.reverseOrder()).map(Path::toFile).forEach(File::delete);
-
+
-        assertFalse("Directory still exists", Files.exists(pathToBeDeleted));
+        assertFalse("Directory still exists", Files.exists(pathToBeDeleted));
-    }
+    }
-
+
-    @Test
+    @Test
-    public void givenDirectory_whenDeletedWithNIO2WalkFileTree_thenIsGone() throws IOException {
+    public void givenDirectory_whenDeletedWithNIO2WalkFileTree_thenIsGone() throws IOException {
-        Path pathToBeDeleted = TEMP_DIRECTORY.resolve(DIRECTORY_NAME);
+        Path pathToBeDeleted = TEMP_DIRECTORY.resolve(DIRECTORY_NAME);
-
+
-        Files.walkFileTree(pathToBeDeleted, new SimpleFileVisitor<Path>() {
+        Files.walkFileTree(pathToBeDeleted, new SimpleFileVisitor<Path>() {
-            @Override
+            @Override
-            public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
+            public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
-                Files.delete(dir);
+                Files.delete(dir);
-                return FileVisitResult.CONTINUE;
+                return FileVisitResult.CONTINUE;
-            }
+            }
-
+
-            @Override
+            @Override
-            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
-                Files.delete(file);
+                Files.delete(file);
-                return FileVisitResult.CONTINUE;
+                return FileVisitResult.CONTINUE;
-            }
+            }
-        });
+        });
-
+
-        assertFalse("Directory still exists", Files.exists(pathToBeDeleted));
+        assertFalse("Directory still exists", Files.exists(pathToBeDeleted));
-    }
+    }
-}
+}

libraries-5/README.md

@@ -0,0 +1,21 @@
+## Libraries-5
+
+This module contains articles about various Java libraries. 
+These are small libraries that are relatively easy to use and do not require any separate module of their own.
+
+The code examples related to different libraries are each in their own module.
+
+Remember, for advanced libraries like [Jackson](/jackson) and [JUnit](/testing-modules) we already have separate modules. Please make sure to have a look at the existing modules in such cases.
+
+### Relevant articles
+- [Introduction to Caffeine](https://www.baeldung.com/java-caching-caffeine)
+- [Introduction to StreamEx](https://www.baeldung.com/streamex)
+- [A Docker Guide for Java](https://www.baeldung.com/docker-java-api)
+- [Introduction to Akka Actors in Java](https://www.baeldung.com/akka-actors-java)
+- [A Guide to Byte Buddy](https://www.baeldung.com/byte-buddy)
+- [Introduction to jOOL](https://www.baeldung.com/jool)
+- [Consumer Driven Contracts with Pact](https://www.baeldung.com/pact-junit-consumer-driven-contracts)
+- [Introduction to Atlassian Fugue](https://www.baeldung.com/java-fugue)
+- [Publish and Receive Messages with Nats Java Client](https://www.baeldung.com/nats-java-client)
+- [Java Concurrency Utility with JCTools](https://www.baeldung.com/java-concurrency-jc-tools)
+- More articles [[<-- prev]](/libraries-4) [[next -->]](/libraries-6)

libraries-5/pom.xml

@@ -0,0 +1,146 @@
+<?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">
+    <parent>
+        <artifactId>parent-modules</artifactId>
+        <groupId>com.baeldung</groupId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>libraries-5</artifactId>
+    <modelVersion>4.0.0</modelVersion>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-web</artifactId>
+            <version>${spring.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.jooq</groupId>
+            <artifactId>jool</artifactId>
+            <version>${jool.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>au.com.dius</groupId>
+            <artifactId>pact-jvm-consumer-junit_2.11</artifactId>
+            <version>${pact.version}</version>
+            <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.codehaus.groovy</groupId>
+                    <artifactId>groovy-all</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+
+        <!-- https://mvnrepository.com/artifact/com.typesafe.akka/akka-actor -->
+        <dependency>
+            <groupId>com.typesafe.akka</groupId>
+            <artifactId>akka-actor_${scala.version}</artifactId>
+            <version>${typesafe-akka.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.typesafe.akka</groupId>
+            <artifactId>akka-testkit_${scala.version}</artifactId>
+            <version>${typesafe-akka.version}</version>
+            <scope>test</scope>
+
+        </dependency>
+                <dependency>
+                    <groupId>one.util</groupId>
+                    <artifactId>streamex</artifactId>
+                    <version>${streamex.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>net.bytebuddy</groupId>
+            <artifactId>byte-buddy</artifactId>
+            <version>${bytebuddy.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>net.bytebuddy</groupId>
+            <artifactId>byte-buddy-agent</artifactId>
+            <version>${bytebuddy.version}</version>
+        </dependency>
+
+        <!--Java Docker API Client -->
+        <dependency>
+            <groupId>com.github.docker-java</groupId>
+            <artifactId>docker-java</artifactId>
+            <version>${docker.version}</version>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.slf4j</groupId>
+                    <artifactId>slf4j-log4j12</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>org.slf4j</groupId>
+                    <artifactId>jcl-over-slf4j</artifactId>
+                </exclusion>
+                <exclusion>
+                    <groupId>ch.qos.logback</groupId>
+                    <artifactId>logback-classic</artifactId>
+                </exclusion>
+            </exclusions>
+        </dependency>
+        <!--Java Docker API Client -->
+
+        <dependency>
+            <groupId>com.github.ben-manes.caffeine</groupId>
+            <artifactId>caffeine</artifactId>
+            <version>${caffeine.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>${findbugs.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <!-- Atlassian Fugue -->
+        <dependency>
+            <groupId>io.atlassian.fugue</groupId>
+            <artifactId>fugue</artifactId>
+            <version>${fugue.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.nats</groupId>
+            <artifactId>jnats</artifactId>
+            <version>${jnats.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.jctools</groupId>
+            <artifactId>jctools-core</artifactId>
+            <version>${jctools.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-core</artifactId>
+            <version>${jmh.version}</version>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <pact.version>3.5.0</pact.version>
+        <jool.version>0.9.12</jool.version>
+        <spring.version>4.3.8.RELEASE</spring.version>
+        <assertj.version>3.6.2</assertj.version>
+        <scala.version>2.11</scala.version>
+        <typesafe-akka.version>2.5.11</typesafe-akka.version>
+        <streamex.version>0.6.5</streamex.version>
+        <bytebuddy.version>1.7.1</bytebuddy.version>
+        <docker.version>3.0.14</docker.version>
+        <caffeine.version>2.5.5</caffeine.version>
+        <findbugs.version>3.0.2</findbugs.version>
+        <fugue.version>4.5.1</fugue.version>
+        <jnats.version>1.0</jnats.version>
+        <jctools.version>2.1.2</jctools.version>
+        <jmh.version>1.19</jmh.version>
+    </properties>
+
+</project>

libraries-5/src/test/java/com/baeldung/caffeine/CaffeineUnitTest.java

@@ -8,6 +8,7 @@ import java.util.concurrent.TimeUnit;
 
 import javax.annotation.Nonnull;
 
+import org.junit.Assert;
 import org.junit.Test;
 
 import com.github.benmanes.caffeine.cache.*;
@@ -65,43 +66,43 @@ public class CaffeineUnitTest {
             assertEquals("Data for " + key, dataObject.getData());
         });
 
-        cache.getAll(Arrays.asList("A", "B", "C")).thenAccept(dataObjectMap -> assertEquals(3, dataObjectMap.size()));
+        cache.getAll(Arrays.asList("A", "B", "C")).thenAccept(dataObjectMap -> Assert.assertEquals(3, dataObjectMap.size()));
     }
 
     @Test
     public void givenLoadingCacheWithSmallSize_whenPut_thenSizeIsConstant() {
         LoadingCache<String, DataObject> cache = Caffeine.newBuilder().maximumSize(1).refreshAfterWrite(10, TimeUnit.MINUTES).build(k -> DataObject.get("Data for " + k));
 
-        assertEquals(0, cache.estimatedSize());
+        Assert.assertEquals(0, cache.estimatedSize());
 
         cache.get("A");
 
-        assertEquals(1, cache.estimatedSize());
+        Assert.assertEquals(1, cache.estimatedSize());
 
         cache.get("B");
         cache.cleanUp();
 
-        assertEquals(1, cache.estimatedSize());
+        Assert.assertEquals(1, cache.estimatedSize());
     }
 
     @Test
     public void givenLoadingCacheWithWeigher_whenPut_thenSizeIsConstant() {
         LoadingCache<String, DataObject> cache = Caffeine.newBuilder().maximumWeight(10).weigher((k, v) -> 5).build(k -> DataObject.get("Data for " + k));
 
-        assertEquals(0, cache.estimatedSize());
+        Assert.assertEquals(0, cache.estimatedSize());
 
         cache.get("A");
 
-        assertEquals(1, cache.estimatedSize());
+        Assert.assertEquals(1, cache.estimatedSize());
 
         cache.get("B");
 
-        assertEquals(2, cache.estimatedSize());
+        Assert.assertEquals(2, cache.estimatedSize());
 
         cache.get("C");
         cache.cleanUp();
 
-        assertEquals(2, cache.estimatedSize());
+        Assert.assertEquals(2, cache.estimatedSize());
     }
 
     @Test
@@ -138,7 +139,7 @@ public class CaffeineUnitTest {
         cache.get("A");
         cache.get("A");
 
-        assertEquals(1, cache.stats().hitCount());
+        Assert.assertEquals(1, cache.stats().hitCount());
-        assertEquals(1, cache.stats().missCount());
+        Assert.assertEquals(1, cache.stats().missCount());
     }
 }

libraries-5/src/test/java/com/baeldung/dockerapi/ContainerLiveTest.java

@@ -6,6 +6,8 @@ import com.github.dockerjava.api.command.InspectContainerResponse;
 import com.github.dockerjava.api.model.Container;
 import com.github.dockerjava.api.model.PortBinding;
 import com.github.dockerjava.core.DockerClientBuilder;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.core.Is;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
@@ -51,7 +53,7 @@ public class ContainerLiveTest {
         CreateContainerResponse container = dockerClient.createContainerCmd("mongo:3.6").withCmd("--bind_ip_all").withName("mongo").withHostName("baeldung").withEnv("MONGO_LATEST_VERSION=3.6").withPortBindings(PortBinding.parse("9999:27017")).exec();
 
         // then
-        assertThat(container.getId(), is(not(null)));
+        MatcherAssert.assertThat(container.getId(), is(not(null)));
     }
 
     @Test
@@ -104,7 +106,7 @@ public class ContainerLiveTest {
         // then
         InspectContainerResponse containerResponse = dockerClient.inspectContainerCmd(container.getId()).exec();
 
-        assertThat(containerResponse.getId(), is(container.getId()));
+        MatcherAssert.assertThat(containerResponse.getId(), Is.is(container.getId()));
     }
 
     @Test

libraries-5/src/test/java/com/baeldung/dockerapi/ImageLiveTest.java

@@ -8,6 +8,8 @@ import com.github.dockerjava.core.DockerClientBuilder;
 import com.github.dockerjava.core.command.BuildImageResultCallback;
 import com.github.dockerjava.core.command.PullImageResultCallback;
 import com.github.dockerjava.core.command.PushImageResultCallback;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.core.Is;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
@@ -81,7 +83,7 @@ public class ImageLiveTest {
         InspectImageResponse imageResponse = dockerClient.inspectImageCmd(image.getId()).exec();
 
         // then
-        assertThat(imageResponse.getId(), is(image.getId()));
+        MatcherAssert.assertThat(imageResponse.getId(), Is.is(image.getId()));
     }
 
     @Test

libraries-5/src/test/java/com/baeldung/dockerapi/NetworkLiveTest.java

@@ -5,6 +5,7 @@ import com.github.dockerjava.api.command.CreateNetworkResponse;
 import com.github.dockerjava.api.model.Network;
 import com.github.dockerjava.api.model.Network.Ipam;
 import com.github.dockerjava.core.DockerClientBuilder;
+import org.hamcrest.MatcherAssert;
 import org.junit.BeforeClass;
 import org.junit.Ignore;
 import org.junit.Test;
@@ -64,7 +65,7 @@ public class NetworkLiveTest {
         Network network = dockerClient.inspectNetworkCmd().withNetworkId(networkName).exec();
 
         // then
-        assertThat(network.getName(), is(networkName));
+        MatcherAssert.assertThat(network.getName(), is(networkName));
     }
 
     @Test

libraries-5/src/test/java/com/baeldung/dockerapi/VolumeLiveTest.java

@@ -5,6 +5,7 @@ import com.github.dockerjava.api.command.CreateVolumeResponse;
 import com.github.dockerjava.api.command.InspectVolumeResponse;
 import com.github.dockerjava.api.command.ListVolumesResponse;
 import com.github.dockerjava.core.DockerClientBuilder;
+import org.hamcrest.MatcherAssert;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
@@ -57,7 +58,7 @@ public class VolumeLiveTest {
         CreateVolumeResponse unnamedVolume = dockerClient.createVolumeCmd().exec();
 
         // then
-        assertThat(unnamedVolume.getName(), is(not(null)));
+        MatcherAssert.assertThat(unnamedVolume.getName(), is(not(null)));
     }
 
     @Test
@@ -67,7 +68,7 @@ public class VolumeLiveTest {
         CreateVolumeResponse namedVolume = dockerClient.createVolumeCmd().withName("myNamedVolume").exec();
 
         // then
-        assertThat(namedVolume.getName(), is(not(null)));
+        MatcherAssert.assertThat(namedVolume.getName(), is(not(null)));
     }
 
     @Test

libraries-5/src/test/java/com/baeldung/fugue/FugueUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.atlassian.fugue;
+package com.baeldung.fugue;
 
 import io.atlassian.fugue.*;
 import org.junit.Assert;

libraries-5/src/test/java/com/baeldung/jctools/JCToolsUnitTest.java

@@ -1,5 +1,6 @@
 package com.baeldung.jctools;
 
+import org.assertj.core.api.Assertions;
 import org.jctools.queues.SpscArrayQueue;
 import org.jctools.queues.SpscChunkedArrayQueue;
 import org.junit.Test;
@@ -44,16 +45,16 @@ public class JCToolsUnitTest {
     @Test
     public void whenQueueIsFull_thenNoMoreElementsCanBeAdded() throws InterruptedException {
         SpscChunkedArrayQueue<Integer> queue = new SpscChunkedArrayQueue<>(8, 16);
-        assertThat(queue.capacity()).isEqualTo(16);
+        Assertions.assertThat(queue.capacity()).isEqualTo(16);
 
         CountDownLatch startConsuming = new CountDownLatch(1);
         CountDownLatch awakeProducer = new CountDownLatch(1);
         AtomicReference<Throwable> error = new AtomicReference<>();
         Thread producer = new Thread(() -> {
             IntStream.range(0, queue.capacity()).forEach(i -> {
-                assertThat(queue.offer(i)).isTrue();
+                Assertions.assertThat(queue.offer(i)).isTrue();
             });
-            assertThat(queue.offer(queue.capacity())).isFalse();
+            Assertions.assertThat(queue.offer(queue.capacity())).isFalse();
             startConsuming.countDown();
             try {
                 awakeProducer.await();
@@ -61,7 +62,7 @@ public class JCToolsUnitTest {
                 throw new RuntimeException(e);
             }
 
-            assertThat(queue.offer(queue.capacity())).isTrue();
+            Assertions.assertThat(queue.offer(queue.capacity())).isTrue();
         });
         producer.setUncaughtExceptionHandler((t, e) -> {
             error.set(e);