From a0282482bc45d6a47e5c10cf078f7260bd1c867c Mon Sep 17 00:00:00 2001
From: codehunter34 <codehunter34@github.com>
Date: Fri, 31 May 2019 23:23:12 -0400
Subject: [PATCH 1/5] BAEL-2969: Copying Sets in Java

---
 .../core-java-collections-set/pom.xml         | 71 ++++++++++--------
 .../main/java/com/baeldung/set/CopySets.java  | 74 +++++++++++++++++++
 2 files changed, 116 insertions(+), 29 deletions(-)
 create mode 100644 core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java

diff --git a/core-java-modules/core-java-collections-set/pom.xml b/core-java-modules/core-java-collections-set/pom.xml
index 2a930efde8..4c1b880f31 100644
--- a/core-java-modules/core-java-collections-set/pom.xml
+++ b/core-java-modules/core-java-collections-set/pom.xml
@@ -1,33 +1,46 @@
-<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-set</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
-    <name>core-java-collections-set</name>
-    <packaging>jar</packaging>
+<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-set</artifactId>
+	<version>0.1.0-SNAPSHOT</version>
+	<name>core-java-collections-set</name>
+	<packaging>jar</packaging>
 
-    <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-java</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-java</relativePath>
-    </parent>
+	<parent>
+		<groupId>com.baeldung</groupId>
+		<artifactId>parent-java</artifactId>
+		<version>0.0.1-SNAPSHOT</version>
+		<relativePath>../../parent-java</relativePath>
+	</parent>
 
-    <dependencies>
-    <dependency>
-        <groupId>com.google.guava</groupId>
-        <artifactId>guava</artifactId>
-        <version>${guava.version}</version>
-    </dependency>
-    <dependency>
-        <groupId>org.apache.commons</groupId>
-        <artifactId>commons-collections4</artifactId>
-        <version>${commons-collections4.version}</version>
-    </dependency>
-    </dependencies>
+	<dependencies>
+		<dependency>
+			<groupId>com.google.guava</groupId>
+			<artifactId>guava</artifactId>
+			<version>${guava.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-collections4</artifactId>
+			<version>${commons-collections4.version}</version>
+		</dependency>
 
-    <properties>
-        <commons-collections4.version>4.3</commons-collections4.version>
-        <guava.version>27.1-jre</guava.version>
-    </properties>
+		<dependency>
+			<groupId>com.google.code.gson</groupId>
+			<artifactId>gson</artifactId>
+			<version>2.8.5</version>
+		</dependency>
+
+		<dependency>
+			<groupId>commons-lang</groupId>
+			<artifactId>commons-lang</artifactId>
+			<version>2.6</version>
+		</dependency>
+	</dependencies>
+
+	<properties>
+		<commons-collections4.version>4.3</commons-collections4.version>
+		<guava.version>27.1-jre</guava.version>
+	</properties>
 </project>
diff --git a/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java b/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java
new file mode 100644
index 0000000000..011ccb9b56
--- /dev/null
+++ b/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java
@@ -0,0 +1,74 @@
+package com.baeldung.set;
+
+import java.io.Serializable;
+import java.util.HashSet;
+import java.util.Objects;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import org.apache.commons.lang.SerializationUtils;
+
+import com.google.gson.Gson;
+
+public class CopySets {
+
+    public static <T> Set<T> copyByConstructor(Set<T> original) {
+        Set<T> copy = new HashSet<>(original);
+        return copy;
+    }
+
+    public static <T> Set<T> copyBySetAddAll(Set<T> original) {
+        Set<T> copy = new HashSet<>();
+        copy.addAll(original);
+        return copy;
+    }
+
+    public static <T> Set<T> copyBySetClone(HashSet<T> original) {
+        Set<T> copy = (Set<T>) original.clone();
+        return copy;
+    }
+
+    public static <T> Set<T> copyByJson(Set<T> original) {
+        Gson gson = new Gson();
+        String jsonStr = gson.toJson(original);
+        Set<T> copy = gson.fromJson(jsonStr, Set.class);
+
+        return copy;
+    }
+
+    public static <T extends Serializable> Set<T> copyByApacheCommonsLang(Set<T> original) {
+        Set<T> copy = new HashSet<>();
+        for (T item : original) {
+            copy.add((T) SerializationUtils.clone(item));
+        }
+        return copy;
+    }
+
+    public static <T> void copyByStreamsAPI(Set<T> original) {
+        Set<T> copy1 = original.stream()
+            .collect(Collectors.toSet());
+
+        // Skip the first element
+        Set<T> copy2 = original.stream()
+            .skip(1)
+            .collect(Collectors.toSet());
+
+        // Filter by comparing the types and attributes
+        Set<T> copy3 = original.stream()
+            .filter(f -> f.getClass()
+                .equals(Integer.class))
+            .collect(Collectors.toSet());
+
+        // Null check in case of expecting null values
+        Set<T> copy4 = original.stream()
+            .filter(Objects::nonNull)
+            .collect(Collectors.toSet());
+
+    }
+
+    public static <T> Set<T> copyByJava8(Set<T> original) {
+        Set<T> copy = Set.copyOf(original);
+        return copy;
+    }
+
+}

From 858927c98524a5a0cd1c6862d88bdd1c107e2e82 Mon Sep 17 00:00:00 2001
From: codehunter34 <codehunter34@github.com>
Date: Fri, 7 Jun 2019 14:55:13 -0400
Subject: [PATCH 2/5] BAEL-2969: Copying Sets in Java

---
 .../main/java/com/baeldung/set/CopySets.java  | 92 +++++++++----------
 1 file changed, 41 insertions(+), 51 deletions(-)

diff --git a/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java b/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java
index 011ccb9b56..0a173cb772 100644
--- a/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java
+++ b/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java
@@ -2,7 +2,6 @@ package com.baeldung.set;
 
 import java.io.Serializable;
 import java.util.HashSet;
-import java.util.Objects;
 import java.util.Set;
 import java.util.stream.Collectors;
 
@@ -12,63 +11,54 @@ import com.google.gson.Gson;
 
 public class CopySets {
 
-    public static <T> Set<T> copyByConstructor(Set<T> original) {
-        Set<T> copy = new HashSet<>(original);
-        return copy;
-    }
+	// Copy Constructor
+	public static <T> Set<T> copyByConstructor(Set<T> original) {
+		Set<T> copy = new HashSet<>(original);
+		return copy;
+	}
 
-    public static <T> Set<T> copyBySetAddAll(Set<T> original) {
-        Set<T> copy = new HashSet<>();
-        copy.addAll(original);
-        return copy;
-    }
+	// Set.addAll
+	public static <T> Set<T> copyBySetAddAll(Set<T> original) {
+		Set<T> copy = new HashSet<>();
+		copy.addAll(original);
+		return copy;
+	}
 
-    public static <T> Set<T> copyBySetClone(HashSet<T> original) {
-        Set<T> copy = (Set<T>) original.clone();
-        return copy;
-    }
+	// Set.clone
+	public static <T> Set<T> copyBySetClone(HashSet<T> original) {
+		Set<T> copy = (Set<T>) original.clone();
+		return copy;
+	}
 
-    public static <T> Set<T> copyByJson(Set<T> original) {
-        Gson gson = new Gson();
-        String jsonStr = gson.toJson(original);
-        Set<T> copy = gson.fromJson(jsonStr, Set.class);
+	// JSON
+	public static <T> Set<T> copyByJson(Set<T> original) {
+		Gson gson = new Gson();
+		String jsonStr = gson.toJson(original);
+		Set<T> copy = gson.fromJson(jsonStr, Set.class);
 
-        return copy;
-    }
+		return copy;
+	}
 
-    public static <T extends Serializable> Set<T> copyByApacheCommonsLang(Set<T> original) {
-        Set<T> copy = new HashSet<>();
-        for (T item : original) {
-            copy.add((T) SerializationUtils.clone(item));
-        }
-        return copy;
-    }
+	// Apache Commons Lang
+	public static <T extends Serializable> Set<T> copyByApacheCommonsLang(Set<T> original) {
+		Set<T> copy = new HashSet<>();
+		for (T item : original) {
+			copy.add((T) SerializationUtils.clone(item));
+		}
+		return copy;
+	}
 
-    public static <T> void copyByStreamsAPI(Set<T> original) {
-        Set<T> copy1 = original.stream()
-            .collect(Collectors.toSet());
+	// Collectors.toSet
+	public static <T extends Serializable> Set<T> copyByCollectorsToSet(Set<T> original) {
+		Set<T> copy = original.stream().collect(Collectors.toSet());
 
-        // Skip the first element
-        Set<T> copy2 = original.stream()
-            .skip(1)
-            .collect(Collectors.toSet());
+		return copy;
+	}
 
-        // Filter by comparing the types and attributes
-        Set<T> copy3 = original.stream()
-            .filter(f -> f.getClass()
-                .equals(Integer.class))
-            .collect(Collectors.toSet());
-
-        // Null check in case of expecting null values
-        Set<T> copy4 = original.stream()
-            .filter(Objects::nonNull)
-            .collect(Collectors.toSet());
-
-    }
-
-    public static <T> Set<T> copyByJava8(Set<T> original) {
-        Set<T> copy = Set.copyOf(original);
-        return copy;
-    }
+	// Using Java 10
+	public static <T> Set<T> copyBySetCopyOf(Set<T> original) {
+		Set<T> copy = Set.copyOf(original);
+		return copy;
+	}
 
 }

From d69a81e25c05f842fac436c18977bfc440d11795 Mon Sep 17 00:00:00 2001
From: codehunter34 <codehunter34@github.com>
Date: Fri, 7 Jun 2019 15:01:42 -0400
Subject: [PATCH 3/5] BAEL-2969: Copying Sets in Java

---
 .../core-java-collections-set/pom.xml         |  3 +-
 .../main/java/com/baeldung/set/CopySets.java  | 83 ++++++++++---------
 2 files changed, 43 insertions(+), 43 deletions(-)

diff --git a/core-java-modules/core-java-collections-set/pom.xml b/core-java-modules/core-java-collections-set/pom.xml
index 4c1b880f31..21b1b87ebe 100644
--- a/core-java-modules/core-java-collections-set/pom.xml
+++ b/core-java-modules/core-java-collections-set/pom.xml
@@ -1,5 +1,4 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<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-set</artifactId>
diff --git a/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java b/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java
index 0a173cb772..950ae41357 100644
--- a/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java
+++ b/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java
@@ -11,54 +11,55 @@ import com.google.gson.Gson;
 
 public class CopySets {
 
-	// Copy Constructor
-	public static <T> Set<T> copyByConstructor(Set<T> original) {
-		Set<T> copy = new HashSet<>(original);
-		return copy;
-	}
+    // Copy Constructor
+    public static <T> Set<T> copyByConstructor(Set<T> original) {
+        Set<T> copy = new HashSet<>(original);
+        return copy;
+    }
 
-	// Set.addAll
-	public static <T> Set<T> copyBySetAddAll(Set<T> original) {
-		Set<T> copy = new HashSet<>();
-		copy.addAll(original);
-		return copy;
-	}
+    // Set.addAll
+    public static <T> Set<T> copyBySetAddAll(Set<T> original) {
+        Set<T> copy = new HashSet<>();
+        copy.addAll(original);
+        return copy;
+    }
 
-	// Set.clone
-	public static <T> Set<T> copyBySetClone(HashSet<T> original) {
-		Set<T> copy = (Set<T>) original.clone();
-		return copy;
-	}
+    // Set.clone
+    public static <T> Set<T> copyBySetClone(HashSet<T> original) {
+        Set<T> copy = (Set<T>) original.clone();
+        return copy;
+    }
 
-	// JSON
-	public static <T> Set<T> copyByJson(Set<T> original) {
-		Gson gson = new Gson();
-		String jsonStr = gson.toJson(original);
-		Set<T> copy = gson.fromJson(jsonStr, Set.class);
+    // JSON
+    public static <T> Set<T> copyByJson(Set<T> original) {
+        Gson gson = new Gson();
+        String jsonStr = gson.toJson(original);
+        Set<T> copy = gson.fromJson(jsonStr, Set.class);
 
-		return copy;
-	}
+        return copy;
+    }
 
-	// Apache Commons Lang
-	public static <T extends Serializable> Set<T> copyByApacheCommonsLang(Set<T> original) {
-		Set<T> copy = new HashSet<>();
-		for (T item : original) {
-			copy.add((T) SerializationUtils.clone(item));
-		}
-		return copy;
-	}
+    // Apache Commons Lang
+    public static <T extends Serializable> Set<T> copyByApacheCommonsLang(Set<T> original) {
+        Set<T> copy = new HashSet<>();
+        for (T item : original) {
+            copy.add((T) SerializationUtils.clone(item));
+        }
+        return copy;
+    }
 
-	// Collectors.toSet
-	public static <T extends Serializable> Set<T> copyByCollectorsToSet(Set<T> original) {
-		Set<T> copy = original.stream().collect(Collectors.toSet());
+    // Collectors.toSet
+    public static <T extends Serializable> Set<T> copyByCollectorsToSet(Set<T> original) {
+        Set<T> copy = original.stream()
+            .collect(Collectors.toSet());
 
-		return copy;
-	}
+        return copy;
+    }
 
-	// Using Java 10
-	public static <T> Set<T> copyBySetCopyOf(Set<T> original) {
-		Set<T> copy = Set.copyOf(original);
-		return copy;
-	}
+    // Using Java 10
+    public static <T> Set<T> copyBySetCopyOf(Set<T> original) {
+        Set<T> copy = Set.copyOf(original);
+        return copy;
+    }
 
 }

From 8899b80818cff9a9e4a254fe1f5a10496c87b0df Mon Sep 17 00:00:00 2001
From: codehunter34 <codehunter34@egithub.com>
Date: Mon, 10 Jun 2019 01:48:14 -0400
Subject: [PATCH 4/5] BAEL-2969: Copying sets in Java

---
 .../src/main/java/com/baeldung/set/CopySets.java            | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java b/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java
index 950ae41357..53933e4439 100644
--- a/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java
+++ b/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java
@@ -56,10 +56,4 @@ public class CopySets {
         return copy;
     }
 
-    // Using Java 10
-    public static <T> Set<T> copyBySetCopyOf(Set<T> original) {
-        Set<T> copy = Set.copyOf(original);
-        return copy;
-    }
-
 }

From a342b198b33d26c90c4135c9b231d7688fbba49e Mon Sep 17 00:00:00 2001
From: codehunter34 <codehunter34@egithub.com>
Date: Mon, 10 Jun 2019 01:48:14 -0400
Subject: [PATCH 5/5] BAEL-2969: Copying sets in Java

---
 .../src/main/java/com/baeldung/set/CopySets.java    | 13 +++++++++++++
 .../src/main/java/com/baeldung/set/CopySets.java    |  6 ------
 2 files changed, 13 insertions(+), 6 deletions(-)
 create mode 100644 core-java-modules/core-java-10/src/main/java/com/baeldung/set/CopySets.java

diff --git a/core-java-modules/core-java-10/src/main/java/com/baeldung/set/CopySets.java b/core-java-modules/core-java-10/src/main/java/com/baeldung/set/CopySets.java
new file mode 100644
index 0000000000..d49724f81d
--- /dev/null
+++ b/core-java-modules/core-java-10/src/main/java/com/baeldung/set/CopySets.java
@@ -0,0 +1,13 @@
+package com.baeldung.set;
+
+import java.util.Set;
+
+public class CopySets {
+
+    // Using Java 10
+    public static <T> Set<T> copyBySetCopyOf(Set<T> original) {
+        Set<T> copy = Set.copyOf(original);
+        return copy;
+    }
+
+}
diff --git a/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java b/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java
index 950ae41357..53933e4439 100644
--- a/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java
+++ b/core-java-modules/core-java-collections-set/src/main/java/com/baeldung/set/CopySets.java
@@ -56,10 +56,4 @@ public class CopySets {
         return copy;
     }
 
-    // Using Java 10
-    public static <T> Set<T> copyBySetCopyOf(Set<T> original) {
-        Set<T> copy = Set.copyOf(original);
-        return copy;
-    }
-
 }