- Java.util Package Classes
- Java.util - Home
- Java.util - ArrayDeque
- Java.util - ArrayList
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- Java.util - BitSet
- Java.util - Calendar
- Java.util - Collections
- Java.util - Currency
- Java.util - Date
- Java.util - Dictionary
- Java.util - EnumMap
- Java.util - EnumSet
- Java.util - Formatter
- Java.util - GregorianCalendar
- Java.util - HashMap
- Java.util - HashSet
- Java.util - Hashtable
- Java.util - IdentityHashMap
- Java.util - LinkedHashMap
- Java.util - LinkedHashSet
- Java.util - LinkedList
- Java.util - ListResourceBundle
- Java.util - Locale
- Java.util - Observable
- Java.util - PriorityQueue
- Java.util - Properties
- Java.util - PropertyPermission
- Java.util - PropertyResourceBundle
- Java.util - Random
- Java.util - ResourceBundle
- Java.util - ResourceBundle.Control
- Java.util - Scanner
- Java.util - ServiceLoader
- Java.util - SimpleTimeZone
- Java.util - Stack
- Java.util - StringTokenizer
- Java.util - Timer
- Java.util - TimerTask
- Java.util - TimeZone
- Java.util - TreeMap
- Java.util - TreeSet
- Java.util - UUID
- Java.util - Vector
- Java.util - WeakHashMap
- Java.util Package Extras
- Java.util - Interfaces
- Java.util - Exceptions
- Java.util - Enumerations
- Java.util Useful Resources
- Java.util - Useful Resources
- Java.util - Discussion
Java TreeSet clone() Method
Description
The Java TreeSet clone() method is used to return a shallow copy of this TreeSet instance.
Declaration
Following is the declaration for java.util.TreeSet.clone() method.
public Object clone()
Parameters
NA
Return Value
The method call returns a shallow copy of this set.
Exception
NA
Cloning a TreeSet of Integer Example
The following example shows the usage of Java TreeSet clone() method to get a clone of the treeset. We've created two TreeSet objects of Integer. Then few entries are added using add() method to first treeset and treeset object is cloned using clone() method and then we've printed the cloned tree to check its contents.
package com.tutorialspoint; import java.util.TreeSet; public class TreeSetDemo { public static void main(String[] args) { // creating TreeSet TreeSet <Integer>treeset = new TreeSet<>(); TreeSet <Integer>clonetree = new TreeSet<>(); // adding in the tree treeset.add(12); treeset.add(13); treeset.add(14); // cloning tree into clinetree clonetree = (TreeSet)treeset.clone(); // displaying the Tree set data System.out.print("Tree set : " + clonetree); } }
Output
Let us compile and run the above program, this will produce the following result.
Tree set : [12, 13, 14]
Cloning a TreeSet of String Example
The following example shows the usage of Java TreeSet clone() method to get a clone of the treeset. We've created two TreeSet objects of String. Then few entries are added using add() method to first treeset and treeset object is cloned using clone() method and then we've printed the cloned tree to check its contents.
package com.tutorialspoint; import java.util.TreeSet; public class TreeSetDemo { public static void main(String[] args) { // creating TreeSet TreeSet <String>treeset = new TreeSet<>(); TreeSet <String>clonetree = new TreeSet<>(); // adding in the tree treeset.add("12"); treeset.add("13"); treeset.add("14"); // cloning tree into clinetree clonetree = (TreeSet)treeset.clone(); // displaying the Tree set data System.out.print("Tree set : " + clonetree); } }
Output
Let us compile and run the above program, this will produce the following result.
Tree set : [12, 13, 14]
Cloning a TreeSet of Object Example
The following example shows the usage of Java TreeSet clone() method to get a clone of the treeset. We've created two TreeSet objects of Student. Then few entries are added using add() method to first treeset and treeset object is cloned using clone() method and then we've printed the cloned tree to check its contents.
package com.tutorialspoint; import java.util.TreeSet; public class TreeSetDemo { public static void main(String[] args) { // creating TreeSet TreeSet <Student>treeset = new TreeSet<>(); TreeSet <Student>clonetree = new TreeSet<>(); // adding in the tree set treeset.add(new Student(1, "Robert")); treeset.add(new Student(2, "Julie")); treeset.add(new Student(3, "Adam")); treeset.add(new Student(4, "Julia")); // cloning tree into clinetree clonetree = (TreeSet)treeset.clone(); // displaying the Tree set data System.out.print("Tree set : " + clonetree); } } class Student implements Comparable<Student> { int rollNo; String name; Student(int rollNo, String name){ this.rollNo = rollNo; this.name = name; } @Override public String toString() { return "[ " + this.rollNo + ", " + this.name + " ]"; } @Override public boolean equals(Object obj) { Student s = (Student)obj; return this.rollNo == s.rollNo && this.name.equalsIgnoreCase(s.name); } @Override public int compareTo(Student student) { return this.rollNo - student.rollNo; } }
Output
Let us compile and run the above program, this will produce the following result.
Tree set : [[ 1, Robert ], [ 2, Julie ], [ 3, Adam ], [ 4, Julia ]]