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Java program to create the clone of the TreeSet collection

Given a TreeSet collection, we have to create its clone.
Submitted by Nidhi, on June 05, 2022

Problem statement

In this program, we will create a TreeSet collection with integer elements. Then we will use the clone() method to create a new TreeSet with the same elements.

Example of TreeSet.clone() Method in Java

The source code to create the clone of the TreeSet collection is given below. The given program is compiled and executed successfully.

// Java program to create the clone of the 
// TreeSet collection

import java.io.*;
import java.util.*;

public class Main {
  public static void main(String args[]) {
    TreeSet < Integer > tree = new TreeSet < Integer > ();

    tree.add(10);
    tree.add(20);
    tree.add(25);
    tree.add(30);

    TreeSet < Integer > cloneTree = (TreeSet < Integer > ) tree.clone();

    System.out.println("TreeSet 'tree': " + tree);
    System.out.println("Cloned TreeSet 'cloneTree': " + cloneTree);
  }
}

Output

TreeSet 'tree': [10, 20, 25, 30]
Cloned TreeSet 'cloneTree': [10, 20, 25, 30]

Explanation

In the above program, we imported the "java.util.*", "java.io.*" packages to use the TreeSet class. Here, we created a public class Main.

The Main class contains a main() method. The main() method is the entry point for the program. And, created a TreeSet collection tree and added integer elements using add() method. Then we created a new TreeSet with the same elements using the clone() method. After that, we printed both collections.

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