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Java TreeSet clone() Method with Example

TreeSet Class clone() method: Here, we are going to learn about the clone() method of TreeSet Class with its syntax and example.
Submitted by Preeti Jain, on February 20, 2020

TreeSet Class clone() method

• clone() method is available in java.util package.
• clone() method is used to clone or copy this TreeSet instance.
• clone() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• clone() method does not throw an exception at the time of cloning an object.

Syntax:

    public Object clone();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is Object, it returns cloned TreeSet instance.

Example:

// Java program to demonstrate the example 
// of Object clone() method of TreeSet 

import java.util.*;

public class CloneOfTreeSet {
    public static void main(String[] args) {
        // Instantiates a TreeSet object
        TreeSet < String > tree_set = new TreeSet < String > ();
        TreeSet < String > clone_set = new TreeSet < String > ();

        // By using add() method is to add
        // the given object of this
        // TreeSet 
        tree_set.add("C");
        tree_set.add("C++");
        tree_set.add("JAVA");
        tree_set.add("PHP");
        tree_set.add("SFDC");

        // Display TreeSet
        System.out.println("TreeSet: " + tree_set);
        System.out.println("Clone TreeSet: " + clone_set);

        // By using clone() method is to
        // clone this TreeSet
        clone_set = (TreeSet) tree_set.clone();

        // Display Cloned TreeSet
        System.out.println("tree_set.clone(): " + clone_set);
    }
}

Output

TreeSet: [C, C++, JAVA, PHP, SFDC]
Clone TreeSet: []
tree_set.clone(): [C, C++, JAVA, PHP, SFDC]