[JAVA-48024] Simplify "Working with Java Streams" ebook (#18913)

Author: panos-kakos

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

@@ -1,7 +1,7 @@
 <?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">
+         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-lambdas-2</artifactId>
     <packaging>jar</packaging>
@@ -13,4 +13,12 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons-lang3.version}</version>
+        </dependency>
+    </dependencies>
+
 </project>

core-java-modules/core-java-streams-simple/src/main/java/com/baeldung/streams/minmaxbygroup/OrderItem.java renamed to core-java-modules/core-java-lambdas-2/src/main/java/com/baeldung/minmaxbygroup/OrderItem.java

@@ -1,4 +1,4 @@
-package com.baeldung.streams.minmaxbygroup;
+package com.baeldung.minmaxbygroup;
 
 public class OrderItem {
   private Long id;

core-java-modules/core-java-streams-simple/src/main/java/com/baeldung/streams/minmaxbygroup/OrderItemCategory.java renamed to core-java-modules/core-java-lambdas-2/src/main/java/com/baeldung/minmaxbygroup/OrderItemCategory.java

@@ -1,4 +1,4 @@
-package com.baeldung.streams.minmaxbygroup;
+package com.baeldung.minmaxbygroup;
 
 public enum OrderItemCategory {
   BOOKS,

core-java-modules/core-java-streams-simple/src/main/java/com/baeldung/streams/minmaxbygroup/OrderProcessor.java renamed to core-java-modules/core-java-lambdas-2/src/main/java/com/baeldung/minmaxbygroup/OrderProcessor.java

@@ -1,9 +1,10 @@
-package com.baeldung.streams.minmaxbygroup;
+package com.baeldung.minmaxbygroup;
 
 import java.util.DoubleSummaryStatistics;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
+
 import org.apache.commons.lang3.tuple.Pair;
 
 public class OrderProcessor {

core-java-modules/core-java-streams-simple/src/test/java/com/baeldung/streams/minmaxbygroup/OrderProcessorUnitTest.java renamed to core-java-modules/core-java-lambdas-2/src/test/java/com/baeldung/minmaxbygroup/OrderProcessorUnitTest.java

@@ -1,10 +1,11 @@
-package com.baeldung.streams.minmaxbygroup;
+package com.baeldung.minmaxbygroup;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
+
 import org.apache.commons.lang3.tuple.Pair;
 import org.junit.jupiter.api.Test;
 

core-java-modules/core-java-streams-7/pom.xml

@@ -13,6 +13,14 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons-lang3.version}</version>
+        </dependency>
+    </dependencies>
+
     <build>
         <finalName>core-java-streams-7</finalName>
         <resources>