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Java HashSet clone() Method with Example

HashSet Class clone() method: Here, we are going to learn about the clone() method of HashSet Class with its syntax and example.
Submitted by Preeti Jain, on March 05, 2020

HashSet Class clone() method

• clone() method is available in java.util package.
• clone() method is used to returns a shallow copy of this HashSet.
• 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 copy of this HashSet.

Example:

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

import java.util.*;

public class CloneOfHashSet {
    public static void main(String[] args) {
        // Instantiates a HashSet object
        HashSet < String > hs = new HashSet < String > ();
        HashSet < String > clone_set = new HashSet < String > ();

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

        // Display HashSet
        System.out.println("HashSet: " + hs);
        System.out.println("Clone HashSet: " + clone_set);

        // By using clone() method is to
        // clone this HashSet
        clone_set = (HashSet) hs.clone();

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

Output

HashSet: [JAVA, C++, C, SFDC, PHP]
Clone HashSet: []
hs.clone(): [JAVA, PHP, C++, C, SFDC]