Split or move java-collections-maps module (#7802)

java-collections-maps-2/README.md

@@ -1,3 +1,11 @@
 ## Relevant Articles:
 - [Map of Primitives in Java](https://www.baeldung.com/java-map-primitives)
 - [Copying a HashMap in Java](https://www.baeldung.com/java-copy-hashmap)
+- [Guide to WeakHashMap in Java](https://www.baeldung.com/java-weakhashmap)
+- [Map to String Conversion in Java](https://www.baeldung.com/java-map-to-string-conversion)
+- [Iterate over a Map in Java](https://www.baeldung.com/java-iterate-map)
+- [Merging Two Maps with Java 8](https://www.baeldung.com/java-merge-maps)
+- [Sort a HashMap in Java](https://www.baeldung.com/java-hashmap-sort)
+- [Finding the Highest Value in a Java Map](https://www.baeldung.com/java-find-map-max)
+- [Initialize a HashMap in Java](https://www.baeldung.com/java-initialize-hashmap)
+- [Java TreeMap vs HashMap](https://www.baeldung.com/java-treemap-vs-hashmap)

java-collections-maps-2/pom.xml

@@ -41,6 +41,22 @@
             <artifactId>commons-lang3</artifactId>
             <version>${commons-lang3.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-collections4</artifactId>
+            <version>${commons-collections4.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>one.util</groupId>
+            <artifactId>streamex</artifactId>
+            <version>${streamex.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.jayway.awaitility</groupId>
+            <artifactId>awaitility</artifactId>
+            <version>${avaitility.version}</version>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>org.assertj</groupId>
             <artifactId>assertj-core</artifactId>
@@ -50,6 +66,9 @@
     </dependencies>
 
     <properties>
+        <streamex.version>0.6.5</streamex.version>
+        <commons-collections4.version>4.1</commons-collections4.version>
+        <avaitility.version>1.7.0</avaitility.version>
         <eclipse-collections.version>8.2.0</eclipse-collections.version>
         <trove4j.version>3.0.2</trove4j.version>
         <fastutil.version>8.1.0</fastutil.version>

java-collections-maps-2/src/main/java/com/baeldung/map/convert/MapToString.java

@@ -1,4 +1,4 @@
-package com.baeldung.convert;
+package com.baeldung.map.convert;
 
 import com.google.common.base.Joiner;
 import org.apache.commons.lang3.StringUtils;

java-collections-maps-2/src/main/java/com/baeldung/map/convert/StringToMap.java

@@ -1,4 +1,4 @@
-package com.baeldung.convert;
+package com.baeldung.map.convert;
 
 import com.google.common.base.Splitter;
 

java-collections-maps-2/src/main/java/com/baeldung/map/copyhashmap/CopyHashMap.java

@@ -1,4 +1,6 @@
-package com.baeldung.map;
+package com.baeldung.map.copyhashmap;
+
+import org.apache.commons.lang3.SerializationUtils;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -6,8 +8,6 @@ import java.util.Map.Entry;
 import java.util.Set;
 import java.util.stream.Collectors;
 
-import org.apache.commons.lang3.SerializationUtils;
-
 public class CopyHashMap {
     
     public static <String, Employee> HashMap<String, Employee> copyUsingConstructor(HashMap<String, Employee> originalMap) {

java-collections-maps-2/src/main/java/com/baeldung/map/initialize/MapInitializer.java

@@ -1,4 +1,4 @@
-package com.baeldung.java.map.initialize;
+package com.baeldung.map.initialize;
 
 import java.util.AbstractMap;
 import java.util.Collections;

java-collections-maps-2/src/main/java/com/baeldung/map/mapmax/MapMax.java

@@ -1,11 +1,7 @@
-package com.baeldung.map.util;
+package com.baeldung.map.mapmax;
 
-import java.util.Collections;
+import java.util.*;
-import java.util.Comparator;
-import java.util.HashMap;
-import java.util.Map;
 import java.util.Map.Entry;
-import java.util.Optional;
 
 public class MapMax {
 

java-collections-maps-2/src/main/java/com/baeldung/map/mergemaps/Employee.java

@@ -1,4 +1,4 @@
-package com.baeldung.sort;
+package com.baeldung.map.mergemaps;
 
 public class Employee implements Comparable<Employee> {
 

java-collections-maps-2/src/main/java/com/baeldung/map/mergemaps/MergeMaps.java

@@ -1,7 +1,7 @@
-package com.baeldung.map.java_8;
+package com.baeldung.map.mergemaps;
 
-import com.baeldung.sort.Employee;
 import one.util.streamex.EntryStream;
+
 import java.util.HashMap;
 import java.util.Map;
 import java.util.stream.Collectors;

java-collections-maps-2/src/main/java/com/baeldung/map/primitives/PrimitiveMaps.java

@@ -1,4 +1,4 @@
-package com.baeldung.map;
+package com.baeldung.map.primitives;
 
 import cern.colt.map.AbstractIntDoubleMap;
 import cern.colt.map.OpenIntDoubleHashMap;

java-collections-maps-2/src/main/java/com/baeldung/map/sort/SortHashMap.java

@@ -1,8 +1,8 @@
-package com.baeldung.sort;
+package com.baeldung.map.sort;
 
+import com.baeldung.map.mergemaps.Employee;
 import com.google.common.base.Functions;
 import com.google.common.collect.ImmutableSortedMap;
-import com.google.common.collect.Lists;
 import com.google.common.collect.Ordering;
 
 import java.util.*;

java-collections-maps-2/src/test/java/com/baeldung/map/convert/MapToStringUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.convert;
+package com.baeldung.map.convert;
 
 import org.apache.commons.collections4.MapUtils;
 import org.junit.Assert;

java-collections-maps-2/src/test/java/com/baeldung/map/convert/StringToMapUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.convert;
+package com.baeldung.map.convert;
 
 import org.junit.Assert;
 import org.junit.jupiter.api.Test;

java-collections-maps-2/src/test/java/com/baeldung/map/copyhashmap/CopyHashMapUnitTest.java

@@ -1,13 +1,12 @@
-package com.baeldung.map;
+package com.baeldung.map.copyhashmap;
 
-import static org.assertj.core.api.Assertions.assertThat;
+import com.google.common.collect.ImmutableMap;
+import org.junit.Test;
 
 import java.util.HashMap;
 import java.util.Map;
 
-import org.junit.Test;
+import static org.assertj.core.api.Assertions.assertThat;
-
-import com.google.common.collect.ImmutableMap;
 
 public class CopyHashMapUnitTest {
     

java-collections-maps-2/src/test/java/com/baeldung/map/copyhashmap/Employee.java

@@ -1,4 +1,4 @@
-package com.baeldung.map;
+package com.baeldung.map.copyhashmap;
 
 import java.io.Serializable;
 

java-collections-maps-2/src/test/java/com/baeldung/map/initialize/MapInitializerUnitTest.java

@@ -1,10 +1,10 @@
-package com.baeldung.java.map.initialize;
+package com.baeldung.map.initialize;
 
-import static org.junit.Assert.assertEquals;
+import org.junit.Test;
 
 import java.util.Map;
 
-import org.junit.Test;
+import static org.junit.Assert.assertEquals;
 
 public class MapInitializerUnitTest {
     

java-collections-maps-2/src/test/java/com/baeldung/map/mapmax/MapMaxUnitTest.java

@@ -1,14 +1,13 @@
-package com.baeldung.map.util;
+package com.baeldung.map.mapmax;
 
 
-
+import org.junit.Before;
-import static org.junit.Assert.assertEquals;
+import org.junit.Test;
 
 import java.util.HashMap;
 import java.util.Map;
 
-import org.junit.Before;
+import static org.junit.Assert.assertEquals;
-import org.junit.Test;
 
 public class MapMaxUnitTest {
     

java-collections-maps-2/src/test/java/com/baeldung/map/treemaphashmap/TreeMapVsHashMapUnitTest.java

@@ -1,16 +1,14 @@
-package com.baeldung.collection;
+package com.baeldung.map.treemaphashmap;
-
-import java.util.ConcurrentModificationException;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.Map;
-import java.util.TreeMap;
 
 import org.hamcrest.Matchers;
 import org.junit.Assert;
 import org.junit.Test;
 
-public class WhenComparingTreeMapVsHashMap {
+import java.util.HashMap;
+import java.util.Map;
+import java.util.TreeMap;
+
+public class TreeMapVsHashMapUnitTest {
 
     @Test
     public void whenInsertObjectsTreeMap_thenNaturalOrder() {

java-collections-maps-2/src/test/java/com/baeldung/map/weakhashmap/WeakHashMapUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.weakhashmap;
+package com.baeldung.map.weakhashmap;
 
 
 import org.junit.Test;

java-collections-maps/README.md

@@ -3,21 +3,13 @@
 ## Java Collections Cookbooks and Examples
 
 ### Relevant Articles: 
-- [Guide to WeakHashMap in Java](http://www.baeldung.com/java-weakhashmap)
+- [Guide to the Guava BiMap](https://www.baeldung.com/guava-bimap)
-- [Guide to the Guava BiMap](http://www.baeldung.com/guava-bimap)
+- [The Java HashMap Under the Hood](https://www.baeldung.com/java-hashmap)
-- [The Java HashMap Under the Hood](http://www.baeldung.com/java-hashmap)
+- [A Guide to LinkedHashMap in Java](https://www.baeldung.com/java-linked-hashmap)
-- [A Guide to LinkedHashMap in Java](http://www.baeldung.com/java-linked-hashmap)
+- [A Guide to TreeMap in Java](https://www.baeldung.com/java-treemap)
-- [A Guide to TreeMap in Java](http://www.baeldung.com/java-treemap)
+- [How to Store Duplicate Keys in a Map in Java?](https://www.baeldung.com/java-map-duplicate-keys)
-- [Iterate over a Map in Java](http://www.baeldung.com/java-iterate-map)
-- [Java TreeMap vs HashMap](http://www.baeldung.com/java-treemap-vs-hashmap)
-- [How to Store Duplicate Keys in a Map in Java?](http://www.baeldung.com/java-map-duplicate-keys)
-- [Initialize a HashMap in Java](https://www.baeldung.com/java-initialize-hashmap)
 - [Get the Key for a Value from a Java Map](https://www.baeldung.com/java-map-key-from-value)
-- [Sort a HashMap in Java](https://www.baeldung.com/java-hashmap-sort)
-- [Finding the Highest Value in a Java Map](https://www.baeldung.com/java-find-map-max)
-- [Merging Two Maps with Java 8](https://www.baeldung.com/java-merge-maps)
 - [How to Check If a Key Exists in a Map](https://www.baeldung.com/java-map-key-exists)
 - [Comparing Two HashMaps in Java](https://www.baeldung.com/java-compare-hashmaps)
 - [Immutable Map Implementations in Java](https://www.baeldung.com/java-immutable-maps) 
-- [Map to String Conversion in Java](https://www.baeldung.com/java-map-to-string-conversion)
 - [Guide to Apache Commons MultiValuedMap](https://www.baeldung.com/apache-commons-multi-valued-map)

java-collections-maps/pom.xml

@@ -36,11 +36,6 @@
             <version>${assertj.version}</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>one.util</groupId>
-            <artifactId>streamex</artifactId>
-            <version>${streamex.version}</version>
-        </dependency>
     </dependencies>
 
     <properties>
@@ -49,6 +44,5 @@
         <avaitility.version>1.7.0</avaitility.version>
         <assertj.version>3.6.1</assertj.version>
         <eclipse.collections.version>7.1.0</eclipse.collections.version>
-		<streamex.version>0.6.5</streamex.version>
     </properties>
 </project>

java-collections-maps/src/main/java/com/baeldung/map/MapUtil.java

@@ -1,12 +1,12 @@
 /**
  * 
  */
-package com.baeldung.java.map;
+package com.baeldung.map;
 
 import java.util.HashSet;
 import java.util.Map;
-import java.util.Set;
 import java.util.Map.Entry;
+import java.util.Set;
 import java.util.stream.Stream;
 
 /**

java-collections-maps/src/main/java/com/baeldung/map/MyKey.java

@@ -1,4 +1,4 @@
-package com.baeldung.java.map;
+package com.baeldung.map;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

java-collections-maps/src/main/java/com/baeldung/map/MyLinkedHashMap.java

@@ -1,4 +1,4 @@
-package com.baeldung.java.map;
+package com.baeldung.map;
 
 import java.util.LinkedHashMap;
 import java.util.Map;

java-collections-maps/src/test/java/com/baeldung/map/ImmutableMapUnitTest.java

@@ -1,16 +1,13 @@
-package com.baeldung.java.map;
+package com.baeldung.map;
 
-import static org.junit.jupiter.api.Assertions.assertFalse;
+import com.google.common.collect.ImmutableMap;
-import static org.junit.jupiter.api.Assertions.assertThrows;
+import org.junit.jupiter.api.Test;
-import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 
-import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.*;
-
-import com.google.common.collect.ImmutableMap;
 
 
 public class ImmutableMapUnitTest {

java-collections-maps/src/test/java/com/baeldung/map/KeyCheckUnitTest.java

@@ -1,13 +1,11 @@
-package com.baeldung.java.map;
+package com.baeldung.map;
 
-import static org.junit.Assert.assertFalse;
+import org.junit.Test;
-import static org.junit.Assert.assertNull;
-import static org.junit.Assert.assertTrue;
 
 import java.util.Collections;
 import java.util.Map;
 
-import org.junit.Test;
+import static org.junit.Assert.*;
 
 public class KeyCheckUnitTest {
 

java-collections-maps/src/test/java/com/baeldung/map/MapMultipleValuesUnitTest.java

@@ -1,13 +1,9 @@
-package com.baeldung.java.map;
+package com.baeldung.map;
-
-import static org.assertj.core.api.Assertions.assertThat;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
 
+import com.google.common.collect.ArrayListMultimap;
+import com.google.common.collect.LinkedHashMultimap;
+import com.google.common.collect.Multimap;
+import com.google.common.collect.TreeMultimap;
 import org.apache.commons.collections4.MultiMap;
 import org.apache.commons.collections4.MultiMapUtils;
 import org.apache.commons.collections4.MultiValuedMap;
@@ -18,10 +14,9 @@ import org.junit.Test;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import com.google.common.collect.ArrayListMultimap;
+import java.util.*;
-import com.google.common.collect.LinkedHashMultimap;
+
-import com.google.common.collect.Multimap;
+import static org.assertj.core.api.Assertions.assertThat;
-import com.google.common.collect.TreeMultimap;
 
 public class MapMultipleValuesUnitTest {
     private static final Logger LOG = LoggerFactory.getLogger(MapMultipleValuesUnitTest.class);

java-collections-maps/src/test/java/com/baeldung/map/MapUnitTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.java.map;
+package com.baeldung.map;
 
 import org.junit.Test;
 import org.slf4j.Logger;

java-collections-maps/src/test/java/com/baeldung/map/MapUtilUnitTest.java

@@ -1,9 +1,12 @@
 /**
  * 
  */
-package com.baeldung.java.map;
+package com.baeldung.map;
 
-import static org.junit.Assert.assertEquals;
+import com.google.common.collect.HashBiMap;
+import org.apache.commons.collections4.BidiMap;
+import org.apache.commons.collections4.bidimap.DualHashBidiMap;
+import org.junit.Test;
 
 import java.util.Arrays;
 import java.util.HashMap;
@@ -11,11 +14,7 @@ import java.util.HashSet;
 import java.util.Map;
 import java.util.stream.Collectors;
 
-import org.apache.commons.collections4.BidiMap;
+import static org.junit.Assert.assertEquals;
-import org.apache.commons.collections4.bidimap.DualHashBidiMap;
-import org.junit.Test;
-
-import com.google.common.collect.HashBiMap;
 
 /**
  * @author swpraman

java-collections-maps/src/test/java/com/baeldung/map/MultiValuedMapUnitTest.java

@@ -1,15 +1,4 @@
-package com.baeldung.java.map;
+package com.baeldung.map;
-
-import static org.assertj.core.api.Assertions.assertThat;
-import static org.junit.Assert.assertTrue;
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertFalse;
-
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Set;
 
 import org.apache.commons.collections4.MultiMapUtils;
 import org.apache.commons.collections4.MultiSet;
@@ -18,6 +7,17 @@ import org.apache.commons.collections4.multimap.ArrayListValuedHashMap;
 import org.apache.commons.collections4.multimap.HashSetValuedHashMap;
 import org.junit.Test;
 
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+
 public class MultiValuedMapUnitTest {
 
     @Test

java-collections-maps/src/test/java/com/baeldung/map/compare/HashMapComparisonUnitTest.java

@@ -1,24 +1,21 @@
-package com.baeldung.java.map.compare;
+package com.baeldung.map.compare;
 
-import static org.hamcrest.MatcherAssert.assertThat;
+import com.google.common.base.Equivalence;
-import static org.hamcrest.collection.IsMapContaining.hasEntry;
+import com.google.common.collect.MapDifference;
-import static org.hamcrest.collection.IsMapContaining.hasKey;
+import com.google.common.collect.MapDifference.ValueDifference;
-import static org.junit.Assert.assertEquals;
+import com.google.common.collect.Maps;
-import static org.junit.Assert.assertFalse;
+import org.junit.Before;
-import static org.junit.Assert.assertTrue;
+import org.junit.Test;
 
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.stream.Collectors;
 
-import org.junit.Before;
+import static org.hamcrest.MatcherAssert.assertThat;
-import org.junit.Test;
+import static org.hamcrest.collection.IsMapContaining.hasEntry;
-
+import static org.hamcrest.collection.IsMapContaining.hasKey;
-import com.google.common.base.Equivalence;
+import static org.junit.Assert.*;
-import com.google.common.collect.MapDifference;
-import com.google.common.collect.MapDifference.ValueDifference;
-import com.google.common.collect.Maps;
 
 public class HashMapComparisonUnitTest {