Split or move core-java-collections module (#7842)

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

@@ -0,0 +1,15 @@
+=========
+
+## Core Java Collections Cookbooks and Examples
+
+### Relevant Articles: 
+- [Removing Elements from Java Collections](https://www.baeldung.com/java-collection-remove-elements)
+- [How to Filter a Collection in Java](https://www.baeldung.com/java-collection-filtering)
+- [Join and Split Arrays and Collections in Java](https://www.baeldung.com/java-join-and-split)
+- [Java – Combine Multiple Collections](https://www.baeldung.com/java-combine-multiple-collections)
+- [Combining Different Types of Collections in Java](https://www.baeldung.com/java-combine-collections)
+- [Shuffling Collections In Java](https://www.baeldung.com/java-shuffle-collection)
+- [Sorting in Java](https://www.baeldung.com/java-sorting)
+- [Getting the Size of an Iterable in Java](https://www.baeldung.com/java-iterable-size)
+- [Java Null-Safe Streams from Collections](https://www.baeldung.com/java-null-safe-streams-from-collections)
+

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

@@ -0,0 +1,58 @@
+<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>
+    <artifactId>core-java-collections-2</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>core-java-collections-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>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.eclipse.collections</groupId>
+            <artifactId>eclipse-collections</artifactId>
+            <version>${eclipse.collections.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-collections4</artifactId>
+            <version>${commons-collections4.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-exec</artifactId>
+            <version>${commons-exec.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons-lang3.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.platform</groupId>
+            <artifactId>junit-platform-runner</artifactId>
+            <version>${junit.platform.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <eclipse.collections.version>7.1.0</eclipse.collections.version>
+        <commons-collections4.version>4.1</commons-collections4.version>
+        <assertj.version>3.11.1</assertj.version>
+        <junit.platform.version>1.2.0</junit.platform.version>
+        <commons-exec.version>1.3</commons-exec.version>
+    </properties>
+</project>

core-java-modules/core-java-collections-2/src/main/java/com/baeldung/collections/combiningcollections/CombiningArrays.java

@@ -1,4 +1,4 @@
-package com.baeldung.combiningcollections;
+package com.baeldung.collections.combiningcollections;
 
 import java.util.Arrays;
 import java.util.stream.Stream;

core-java-modules/core-java-collections-2/src/main/java/com/baeldung/collections/combiningcollections/CombiningLists.java

@@ -1,4 +1,4 @@
-package com.baeldung.combiningcollections;
+package com.baeldung.collections.combiningcollections;
 
 import java.util.ArrayList;
 import java.util.Collection;

core-java-modules/core-java-collections-2/src/main/java/com/baeldung/collections/combiningcollections/CombiningMaps.java

@@ -1,4 +1,4 @@
-package com.baeldung.combiningcollections;
+package com.baeldung.collections.combiningcollections;
 
 import java.util.Collection;
 import java.util.HashMap;

core-java-modules/core-java-collections-2/src/main/java/com/baeldung/collections/combiningcollections/CombiningSets.java

@@ -1,4 +1,4 @@
-package com.baeldung.combiningcollections;
+package com.baeldung.collections.combiningcollections;
 
 import java.util.Collection;
 import java.util.HashSet;

core-java-modules/core-java-collections-2/src/main/java/com/baeldung/collections/filtering/CollectionUtilsCollectionFilter.java

@@ -1,4 +1,4 @@
-package com.baeldung.java.filtering;
+package com.baeldung.collections.filtering;
 
 import java.util.Collection;
 

core-java-modules/core-java-collections-2/src/main/java/com/baeldung/collections/filtering/EclipseCollectionsCollectionFilter.java

@@ -1,4 +1,4 @@
-package com.baeldung.java.filtering;
+package com.baeldung.collections.filtering;
 
 import java.util.Collection;
 

core-java-modules/core-java-collections-2/src/main/java/com/baeldung/collections/filtering/GuavaCollectionFilter.java

@@ -1,4 +1,4 @@
-package com.baeldung.java.filtering;
+package com.baeldung.collections.filtering;
 
 import java.util.Collection;
 

core-java-modules/core-java-collections-2/src/main/java/com/baeldung/collections/filtering/StreamsCollectionFilter.java

@@ -1,4 +1,4 @@
-package com.baeldung.java.filtering;
+package com.baeldung.collections.filtering;
 
 import java.util.Collection;
 import java.util.function.Predicate;

core-java-modules/core-java-collections-2/src/main/java/com/baeldung/collections/iterablesize/IterableSize.java

@@ -1,4 +1,4 @@
-package com.baeldung.java.iterable;
+package com.baeldung.collections.iterablesize;
 
 import java.util.Collection;
 import java.util.stream.StreamSupport;

core-java-modules/core-java-collections-2/src/main/java/com/baeldung/collections/nullsafecollectionstreams/NullSafeCollectionStreamsUsingCommonsEmptyIfNull.java

@@ -1,4 +1,4 @@
-package com.baeldung.nullsafecollectionstreams;
+package com.baeldung.collections.nullsafecollectionstreams;
 
 import java.util.Collection;
 import java.util.stream.Stream;

core-java-modules/core-java-collections-2/src/main/java/com/baeldung/collections/nullsafecollectionstreams/NullSafeCollectionStreamsUsingJava8OptionalContainer.java

@@ -1,4 +1,4 @@
-package com.baeldung.nullsafecollectionstreams;
+package com.baeldung.collections.nullsafecollectionstreams;
 
 import java.util.Collection;
 import java.util.Optional;

core-java-modules/core-java-collections-2/src/main/java/com/baeldung/collections/nullsafecollectionstreams/NullSafeCollectionStreamsUsingNullDereferenceCheck.java

@@ -1,4 +1,4 @@
-package com.baeldung.nullsafecollectionstreams;
+package com.baeldung.collections.nullsafecollectionstreams;
 
 import java.util.Collection;
 import java.util.stream.Stream;

core-java-modules/core-java-collections-2/src/main/java/com/baeldung/collections/removal/CollectionRemoveIf.java

@@ -1,4 +1,4 @@
-package com.baeldung.removal;
+package com.baeldung.collections.removal;
 
 import java.util.ArrayList;
 import java.util.Collection;

core-java-modules/core-java-collections-2/src/main/java/com/baeldung/collections/removal/Iterators.java

@@ -1,4 +1,4 @@
-package com.baeldung.removal;
+package com.baeldung.collections.removal;
 
 import java.util.ArrayList;
 import java.util.Collection;

core-java-modules/core-java-collections-2/src/main/java/com/baeldung/collections/removal/StreamFilterAndCollector.java

@@ -1,4 +1,4 @@
-package com.baeldung.removal;
+package com.baeldung.collections.removal;
 
 import java.util.ArrayList;
 import java.util.Collection;

core-java-modules/core-java-collections-2/src/main/java/com/baeldung/collections/removal/StreamPartitioningBy.java

@@ -1,4 +1,4 @@
-package com.baeldung.removal;
+package com.baeldung.collections.removal;
 
 import java.util.ArrayList;
 import java.util.Collection;

core-java-modules/core-java-collections-2/src/test/java/com/baeldung/collections/combiningcollections/CombiningArraysUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.combiningcollections;
+package com.baeldung.collections.combiningcollections;
 
 import static org.junit.Assert.*;
 import org.junit.Test;

core-java-modules/core-java-collections-2/src/test/java/com/baeldung/collections/combiningcollections/CombiningListsUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.combiningcollections;
+package com.baeldung.collections.combiningcollections;
 
 import static org.hamcrest.CoreMatchers.is;
 import static org.junit.Assert.assertThat;

core-java-modules/core-java-collections-2/src/test/java/com/baeldung/collections/combiningcollections/CombiningMapsUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.combiningcollections;
+package com.baeldung.collections.combiningcollections;
 
 import static org.hamcrest.CoreMatchers.is;
 import static org.junit.Assert.assertThat;

core-java-modules/core-java-collections-2/src/test/java/com/baeldung/collections/combiningcollections/CombiningSetsUnitTest.java

@@ -1,5 +1,5 @@
 
-package com.baeldung.combiningcollections;
+package com.baeldung.collections.combiningcollections;
 
 import static org.hamcrest.CoreMatchers.is;
 import static org.junit.Assert.assertThat;

core-java-modules/core-java-collections-2/src/test/java/com/baeldung/collections/filtering/CollectionFiltersUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.java.filtering;
+package com.baeldung.collections.filtering;
 
 import static org.assertj.core.api.Assertions.assertThat;
 

core-java-modules/core-java-collections-2/src/test/java/com/baeldung/collections/iterablesize/IterableSizeUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.java.iterable;
+package com.baeldung.collections.iterablesize;
 
 import static org.junit.Assert.assertEquals;
 

core-java-modules/core-java-collections-2/src/test/java/com/baeldung/collections/joinsplit/CollectionsJoinAndSplitJUnitTest.java

@@ -1,4 +1,4 @@
-package org.baeldung.java.collections;
+package com.baeldung.collections.joinsplit;
 
 import java.util.ArrayList;
 import java.util.Collections;

core-java-modules/core-java-collections-2/src/test/java/com/baeldung/collections/joinsplit/JoinSplitCollectionsUnitTest.java

@@ -1,4 +1,4 @@
-package org.baeldung.java.collections;
+package com.baeldung.collections.joinsplit;
 
 import org.junit.Test;
 

core-java-modules/core-java-collections-2/src/test/java/com/baeldung/collections/multiplecollections/CombineMultipleCollectionsUnitTest.java

@@ -1,4 +1,4 @@
-package org.baeldung.java.collections;
+package com.baeldung.collections.multiplecollections;
 
 import com.google.common.collect.Iterables;
 import com.google.common.collect.Lists;
@@ -14,7 +14,7 @@ import java.util.stream.Stream;
 
 import static java.util.Arrays.asList;
 
-public class CollectionsConcatenateUnitTest {
+public class CombineMultipleCollectionsUnitTest {
 
     @Test
     public void givenUsingJava8_whenConcatenatingUsingConcat_thenCorrect() {

core-java-modules/core-java-collections-2/src/test/java/com/baeldung/collections/nullsafecollectionstreams/NullSafeCollectionStreamsUsingCommonsEmptyIfNullUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.nullsafecollectionstreams;
+package com.baeldung.collections.nullsafecollectionstreams;
 
 import java.util.Arrays;
 import java.util.Collection;

core-java-modules/core-java-collections-2/src/test/java/com/baeldung/collections/nullsafecollectionstreams/NullSafeCollectionStreamsUsingJava8OptionalContainerUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.nullsafecollectionstreams;
+package com.baeldung.collections.nullsafecollectionstreams;
 
 import java.util.Arrays;
 import java.util.Collection;

core-java-modules/core-java-collections-2/src/test/java/com/baeldung/collections/nullsafecollectionstreams/NullSafeCollectionStreamsUsingNullDereferenceCheckUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.nullsafecollectionstreams;
+package com.baeldung.collections.nullsafecollectionstreams;
 
 import java.util.Arrays;
 import java.util.Collection;

core-java-modules/core-java-collections-2/src/test/java/com/baeldung/collections/removal/RemovalUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.removal;
+package com.baeldung.collections.removal;
 
 import org.junit.Before;
 import org.junit.Test;

core-java-modules/core-java-collections-2/src/test/java/com/baeldung/collections/shufflingcollections/ShufflingCollectionsUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.shufflingcollections;
+package com.baeldung.collections.shufflingcollections;
 
 import org.junit.Test;
 

core-java-modules/core-java-collections-2/src/test/java/com/baeldung/collections/sorting/Employee.java

@@ -1,4 +1,4 @@
-package org.baeldung.java.sorting;
+package com.baeldung.collections.sorting;
 
 public class Employee implements Comparable {
 

core-java-modules/core-java-collections-2/src/test/java/com/baeldung/collections/sorting/JavaSortingUnitTest.java

@@ -1,4 +1,4 @@
-package org.baeldung.java.sorting;
+package com.baeldung.collections.sorting;
 
 import com.google.common.primitives.Ints;
 import org.apache.commons.lang3.ArrayUtils;

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

@@ -0,0 +1,11 @@
+=========
+
+## Core Java Collections Cookbooks and Examples
+
+### Relevant Articles: 
+- [Time Comparison of Arrays.sort(Object[]) and Arrays.sort(int[])](https://www.baeldung.com/arrays-sortobject-vs-sortint)
+- [Java ArrayList vs Vector](https://www.baeldung.com/java-arraylist-vs-vector)
+- [Differences Between HashMap and Hashtable](https://www.baeldung.com/hashmap-hashtable-differences)
+- [Differences Between Collection.clear() and Collection.removeAll()](https://www.baeldung.com/java-collection-clear-vs-removeall)
+- [Performance of contains() in a HashSet vs ArrayList](https://www.baeldung.com/java-hashset-arraylist-contains-performance)
+- [Fail-Safe Iterator vs Fail-Fast Iterator](https://www.baeldung.com/java-fail-safe-vs-fail-fast-iterator)

core-java-modules/core-java-collections-3/pom.xml

@@ -0,0 +1,34 @@
+<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>
+    <artifactId>core-java-collections-3</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <name>core-java-collections-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>org.openjdk.jmh</groupId>
+            <artifactId>jmh-core</artifactId>
+            <version>${openjdk.jmh.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <openjdk.jmh.version>1.19</openjdk.jmh.version>
+        <assertj.version>3.11.1</assertj.version>
+    </properties>
+</project>

core-java-modules/core-java-collections-3/src/main/java/com/baeldung/collections/arraylistvsvector/ArrayListBenchmark.java

@@ -1,4 +1,4 @@
-package com.baeldung.performance;
+package com.baeldung.collections.arraylistvsvector;
 
 import org.openjdk.jmh.annotations.*;
 import org.openjdk.jmh.runner.Runner;

core-java-modules/core-java-collections-3/src/main/java/com/baeldung/collections/arraylistvsvector/Employee.java

@@ -0,0 +1,55 @@
+package com.baeldung.collections.arraylistvsvector;
+
+public class Employee {
+
+    private Long id;
+    private String name;
+
+    public Employee(Long id, String name) {
+        this.name = name;
+        this.id = id;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Employee employee = (Employee) o;
+
+        if (!id.equals(employee.id)) return false;
+        return name.equals(employee.name);
+
+    }
+
+    @Override
+    public int hashCode() {
+        int result = id.hashCode();
+        result = 31 * result + name.hashCode();
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return "Employee{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                '}';
+    }
+}

core-java-modules/core-java-collections-3/src/main/java/com/baeldung/collections/arraylistvsvector/VectorExample.java

@@ -1,4 +1,4 @@
-package com.baeldung.java.list;
+package com.baeldung.collections.arraylistvsvector;
 
 import java.util.Enumeration;
 import java.util.Iterator;

core-java-modules/core-java-collections-3/src/main/java/com/baeldung/collections/containsperformance/CollectionsBenchmark.java

@@ -1,4 +1,4 @@
-package com.baeldung.performance;
+package com.baeldung.collections.containsperformance;
 
 import org.openjdk.jmh.annotations.*;
 import org.openjdk.jmh.runner.Runner;

core-java-modules/core-java-collections-3/src/main/java/com/baeldung/collections/containsperformance/Employee.java

@@ -0,0 +1,55 @@
+package com.baeldung.collections.containsperformance;
+
+public class Employee {
+
+    private Long id;
+    private String name;
+
+    public Employee(Long id, String name) {
+        this.name = name;
+        this.id = id;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Employee employee = (Employee) o;
+
+        if (!id.equals(employee.id)) return false;
+        return name.equals(employee.name);
+
+    }
+
+    @Override
+    public int hashCode() {
+        int result = id.hashCode();
+        result = 31 * result + name.hashCode();
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return "Employee{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                '}';
+    }
+}

core-java-modules/core-java-collections-3/src/main/java/com/baeldung/collections/iterators/Iterators.java

@@ -1,4 +1,4 @@
-package com.baeldung.iterators;
+package com.baeldung.collections.iterators;
 
 import java.util.ArrayList;
 import java.util.Iterator;

core-java-modules/core-java-collections-3/src/main/java/com/baeldung/collections/sortingcomparison/ArraySortBenchmark.java

@@ -1,4 +1,4 @@
-package com.baeldung.performance;
+package com.baeldung.collections.sortingcomparison;
 
 import java.util.Arrays;
 import java.util.concurrent.TimeUnit;

core-java-modules/core-java-collections-3/src/main/java/com/baeldung/collections/sortingcomparison/CollectionsSortCompare.java

@@ -1,4 +1,4 @@
-package com.baeldung.java.sort;
+package com.baeldung.collections.sortingcomparison;
 
 import java.util.ArrayList;
 import java.util.Arrays;

core-java-modules/core-java-collections-3/src/test/java/com/baeldung/collections/clearvsremoveall/ClearVsRemoveAllUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.collection;
+package com.baeldung.collections.clearvsremoveall;
 
 import org.junit.jupiter.api.Test;
 

core-java-modules/core-java-collections-3/src/test/java/com/baeldung/collections/hashmapvshashtable/HashmapVsHashtableDifferenceUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.hashmapvshashtable;
+package com.baeldung.collections.hashmapvshashtable;
 
 import static org.junit.Assert.assertEquals;
 

core-java-modules/core-java-collections-3/src/test/java/com/baeldung/collections/iterators/IteratorsUnitTest.java

@@ -1,8 +1,8 @@
-package com.baeldung.iterators;
+package com.baeldung.collections.iterators;
 
-import static com.baeldung.iterators.Iterators.failFast1;
-import static com.baeldung.iterators.Iterators.failFast2;
-import static com.baeldung.iterators.Iterators.failSafe1;
+import static com.baeldung.collections.iterators.Iterators.failFast1;
+import static com.baeldung.collections.iterators.Iterators.failFast2;
+import static com.baeldung.collections.iterators.Iterators.failSafe1;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 

core-java-modules/core-java-collections-list/README.md

@@ -12,3 +12,4 @@
 - [How to Find an Element in a List with Java](http://www.baeldung.com/find-list-element-java)
 - [Finding Max/Min of a List or Collection](http://www.baeldung.com/java-collection-min-max)
 - [Remove All Occurrences of a Specific Value from a List](https://www.baeldung.com/java-remove-value-from-list)
+- [Removing the First Element of an Array](https://www.baeldung.com/java-array-remove-first-element)

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

@@ -3,29 +3,13 @@
 ## Core Java Collections Cookbooks and Examples
 
 ### Relevant Articles: 
-- [Java – Combine Multiple Collections](http://www.baeldung.com/java-combine-multiple-collections)
-- [Collect a Java Stream to an Immutable Collection](http://www.baeldung.com/java-stream-immutable-collection)
-- [Introduction to the Java ArrayDeque](http://www.baeldung.com/java-array-deque)
-- [Getting the Size of an Iterable in Java](http://www.baeldung.com/java-iterable-size)
-- [How to Filter a Collection in Java](http://www.baeldung.com/java-collection-filtering)
-- [Removing the First Element of an Array](https://www.baeldung.com/java-array-remove-first-element)
-- [Fail-Safe Iterator vs Fail-Fast Iterator](http://www.baeldung.com/java-fail-safe-vs-fail-fast-iterator)
-- [Shuffling Collections In Java](http://www.baeldung.com/java-shuffle-collection)
-- [An Introduction to Java.util.Hashtable Class](http://www.baeldung.com/java-hash-table)
-- [Java Null-Safe Streams from Collections](https://www.baeldung.com/java-null-safe-streams-from-collections)
+- [Collect a Java Stream to an Immutable Collection](https://www.baeldung.com/java-stream-immutable-collection)
+- [Introduction to the Java ArrayDeque](https://www.baeldung.com/java-array-deque)
+- [An Introduction to Java.util.Hashtable Class](https://www.baeldung.com/java-hash-table)
 - [Thread Safe LIFO Data Structure Implementations](https://www.baeldung.com/java-lifo-thread-safe)
-- [Differences Between Collection.clear() and Collection.removeAll()](https://www.baeldung.com/java-collection-clear-vs-removeall)
-- [Performance of contains() in a HashSet vs ArrayList](https://www.baeldung.com/java-hashset-arraylist-contains-performance)
 - [Time Complexity of Java Collections](https://www.baeldung.com/java-collections-complexity)
-- [Operating on and Removing an Item from Stream](https://www.baeldung.com/java-use-remove-item-stream)
-- [An Introduction to Synchronized Java Collections](https://www.baeldung.com/java-synchronized-collections)
-- [Removing Elements from Java Collections](https://www.baeldung.com/java-collection-remove-elements)
-- [Combining Different Types of Collections in Java](https://www.baeldung.com/java-combine-collections)
-- [Sorting in Java](http://www.baeldung.com/java-sorting)
-- [Join and Split Arrays and Collections in Java](http://www.baeldung.com/java-join-and-split)
 - [A Guide to EnumMap](https://www.baeldung.com/java-enum-map)
-- [A Guide to Iterator in Java](http://www.baeldung.com/java-iterator)
-- [Differences Between HashMap and Hashtable](https://www.baeldung.com/hashmap-hashtable-differences)
-- [Java ArrayList vs Vector](https://www.baeldung.com/java-arraylist-vs-vector)
+- [A Guide to Iterator in Java](https://www.baeldung.com/java-iterator)
 - [Defining a Char Stack in Java](https://www.baeldung.com/java-char-stack)
-- [Time Comparison of Arrays.sort(Object[]) and Arrays.sort(int[])](https://www.baeldung.com/arrays-sortobject-vs-sortint)
+- [Guide to the Java Queue Interface](https://www.baeldung.com/java-queue)
+- [An Introduction to Synchronized Java Collections](https://www.baeldung.com/java-synchronized-collections)

core-java-modules/core-java-collections/pom.xml

@@ -14,33 +14,12 @@
     </parent>
 
     <dependencies>
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-collections4</artifactId>
-            <version>${commons-collections4.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-lang3</artifactId>
-            <version>${commons-lang3.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.eclipse.collections</groupId>
-            <artifactId>eclipse-collections</artifactId>
-            <version>${eclipse.collections.version}</version>
-        </dependency>
         <dependency>
             <groupId>org.assertj</groupId>
             <artifactId>assertj-core</artifactId>
             <version>${assertj.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.junit.platform</groupId>
-            <artifactId>junit-platform-runner</artifactId>
-            <version>${junit.platform.version}</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.openjdk.jmh</groupId>
             <artifactId>jmh-core</artifactId>
@@ -51,11 +30,6 @@
             <artifactId>jmh-generator-annprocess</artifactId>
             <version>${openjdk.jmh.version}</version>
         </dependency>
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-exec</artifactId>
-            <version>${commons-exec.version}</version>
-        </dependency>
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
@@ -66,13 +40,6 @@
 
     <properties>
         <openjdk.jmh.version>1.19</openjdk.jmh.version>
-        <junit.platform.version>1.2.0</junit.platform.version>
-        <commons-lang3.version>3.8.1</commons-lang3.version>
-        <commons-collections4.version>4.1</commons-collections4.version>
-        <collections-generic.version>4.01</collections-generic.version>
-        <avaitility.version>1.7.0</avaitility.version>
         <assertj.version>3.11.1</assertj.version>
-        <eclipse.collections.version>7.1.0</eclipse.collections.version>
-		<commons-exec.version>1.3</commons-exec.version>
     </properties>
 </project>

core-java-modules/core-java-collections/src/main/java/com/baeldung/synchronizedcollections/Application.java

@@ -1,4 +1,4 @@
-package com.baeldung.synchronizedcollections.application;
+package com.baeldung.synchronizedcollections;
 
 import java.util.Arrays;
 import java.util.Collections;

core-java-modules/core-java-collections/src/test/java/com/baeldung/java/collections/ConcurrentModificationExceptionUnitTest.java

@@ -1,83 +0,0 @@
-package com.baeldung.java.collections;
-
-import org.junit.Test;
-
-import java.util.*;
-import java.util.concurrent.CopyOnWriteArrayList;
-
-import static java.util.Arrays.asList;
-import static org.junit.Assert.assertEquals;
-
-public class ConcurrentModificationExceptionUnitTest {
-
-    @Test
-    public void changingContentWithSetDoesNotThrowConcurrentModificationException() throws Exception {
-        ArrayList<Object> array = new ArrayList<>(asList(0, "one", 2, "three"));
-
-        for (Object item : array) {
-            array.set(3, 3);
-        }
-    }
-
-    @Test
-    public void removingElementUsingIteratorAPI() throws Exception {
-        List<String> originalList = new ArrayList<>(asList("zero", "one", "two", "three"));
-
-        Iterator<String> iterator = originalList.iterator();
-
-        while (iterator.hasNext()) {
-            String next = iterator.next();
-            if (Objects.equals(next, "one")) iterator.remove();
-        }
-
-        assertEquals(originalList, asList("zero", "two", "three"));
-    }
-
-    @Test
-    public void modifyingContentAndIteratingUsingListIteratorAPI() throws Exception {
-        List<String> originalList = new ArrayList<>(asList("zero", "one", "two", "three"));
-
-        ListIterator<String> iterator = originalList.listIterator();
-
-        while (iterator.hasNext()) {
-            String next = iterator.next();
-            if (Objects.equals(next, "one")) {
-                iterator.set("another");
-            }
-
-            if (Objects.equals(next, "two")) {
-                iterator.remove();
-            }
-
-            if (Objects.equals(next, "three")) {
-                iterator.add("four");
-            }
-        }
-
-        assertEquals(originalList, asList("zero", "another", "three", "four"));
-    }
-
-    @Test
-    public void removingElementUsingCopyAndListAPI() throws Exception {
-        List<String> originalList = new ArrayList<>(asList("zero", "one", "two", "three"));
-
-        List<String> listCopy = new ArrayList<>(originalList);
-
-        for (String next : listCopy) {
-            if (Objects.equals(next, "one")) originalList.remove(originalList.indexOf(next) - 1);
-        }
-
-        assertEquals(originalList, asList("one", "two", "three"));
-    }
-
-    @Test
-    public void copyOnWriteList() throws Exception {
-        List<String> originalList = new CopyOnWriteArrayList<>(asList("zero", "one", "two", "three"));
-
-        for (String next : originalList) {
-            if (Objects.equals(next, "one")) originalList.remove(originalList.indexOf(next) - 1);
-        }
-
-        assertEquals(originalList, asList("one", "two", "three"));
-    }
-}

core-java-modules/core-java-collections/src/test/java/com/baeldung/synchronizedcollections/SynchronizedCollectionUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.synchronizedcollections.test;
+package com.baeldung.synchronizedcollections;
 
 import java.util.ArrayList;
 import java.util.Arrays;

core-java-modules/core-java-collections/src/test/java/com/baeldung/synchronizedcollections/SynchronizedListUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.synchronizedcollections.test;
+package com.baeldung.synchronizedcollections;
 
 import java.util.ArrayList;
 import java.util.Arrays;

core-java-modules/core-java-collections/src/test/java/com/baeldung/synchronizedcollections/SynchronizedMapUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.synchronizedcollections.test;
+package com.baeldung.synchronizedcollections;
 
 import java.util.Collections;
 import java.util.HashMap;

core-java-modules/core-java-collections/src/test/java/com/baeldung/synchronizedcollections/SynchronizedSetUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.synchronizedcollections.test;
+package com.baeldung.synchronizedcollections;
 
 import java.util.Arrays;
 import java.util.Collections;

core-java-modules/core-java-collections/src/test/java/com/baeldung/synchronizedcollections/SynchronizedSortedMapUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.synchronizedcollections.test;
+package com.baeldung.synchronizedcollections;
 
 import java.util.Collections;
 import java.util.Map;

core-java-modules/core-java-collections/src/test/java/com/baeldung/synchronizedcollections/SynchronizedSortedSetUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.synchronizedcollections.test;
+package com.baeldung.synchronizedcollections;
 
 import java.util.Arrays;
 import java.util.Collections;

core-java-modules/core-java-collections/src/test/java/org/baeldung/java/collections/README.md

@@ -1,3 +0,0 @@
-### Relevant Articles:
-- [Join and Split Arrays and Collections in Java](http://www.baeldung.com/java-join-and-split)
-- [Introduction to Java Servlets](http://www.baeldung.com/intro-to-servlets)

pom.xml

@@ -401,6 +401,8 @@
                 <module>core-java-modules/core-java-arrays</module>
                 <module>core-java-modules/core-java-arrays-2</module>
                 <module>core-java-modules/core-java-collections</module>
+				<module>core-java-modules/core-java-collections-2</module>
+				<module>core-java-modules/core-java-collections-3</module>
                 <module>core-java-modules/core-java-collections-list</module>
                 <module>core-java-modules/core-java-collections-list-2</module>
                 <module>core-java-modules/core-java-collections-list-3</module>
@@ -1141,6 +1143,8 @@
 				<module>core-java-modules/core-java-arrays</module>
 				<module>core-java-modules/core-java-arrays-2</module>
 				<module>core-java-modules/core-java-collections</module>
+				<module>core-java-modules/core-java-collections-2</module>
+				<module>core-java-modules/core-java-collections-3</module>
 				<module>core-java-modules/core-java-collections-list</module>
 				<module>core-java-modules/core-java-collections-list-2</module>
 				<module>core-java-modules/core-java-collections-list-3</module>