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Java TreeSet clear() Method with Example

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

TreeSet Class clear() method

• clear() method is available in java.util package.
• clear() method is used to clear all of the objects that exist from this TreeSet.
• clear() 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.
• clear() method does not throw an exception at the time of removing objects from this TreeSet.

Syntax:

    public void clear();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is void, it returns nothing.

Example:

// Java program to demonstrate the example 
// of void clear() method of TreeSet 

import java.util.*;

public class ClearOfTreeSet {
    public static void main(String[] args) {
        // Instantiates a TreeSet object
        TreeSet < String > tree_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);

        // By using clear() method is to
        // remove all of the elements exists
        // in this TreeSet
        tree_set.clear();

        // Display Modified TreeSet
        System.out.println("tree_set.clear(): " + tree_set);
    }
}

Output

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