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TreeSet clone() Method in Java

Last Updated : 26 Nov, 2018

The Java.util.TreeSet.clone() method is used to return a shallow copy of the mentioned tree set. It just creates a copy of the set.

Tree_Set.clone()

The method does not take any parameters.

The function just returns a copy of the TreeSet. Below program illustrates the use of Java.util.TreeSet.clone() method:

// Java code to illustrate addAll()
import java.io.*;
import java.util.TreeSet;

public class TreeSetDemo {
    public static void main(String args[])
    {
        // Creating an empty TreeSet
        TreeSet<String> tree = new TreeSet<String>();

        // Use add() method to add elements into the Set
        tree.add("Welcome");
        tree.add("To");
        tree.add("Geeks");
        tree.add("4");
        tree.add("Geeks");
        tree.add("TreeSet");

        // Displaying the TreeSet
        System.out.println("TreeSet: " + tree);

        // Creating a new cloned set
        TreeSet cloned_set = new TreeSet();

        // Cloning the set using clone() method
        cloned_set = (TreeSet)tree.clone();

        // Displaying the cloned_set
        System.out.println("The cloned TreeSet: " + cloned_set);
    }
}

TreeSet: [4, Geeks, To, TreeSet, Welcome]
The cloned TreeSet: [4, Geeks, To, TreeSet, Welcome]

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