Program: How to delete all elements from HashSet?

Below example shows how to delete all entries at one call from HashSet. By calling clear() method, we can remove all elements from HashSet at once.

package com.java2novice.hashset;

import java.util.HashSet;

public class MyHashSetClear {

	public static void main(String a[]){
		HashSet<String> hs = new HashSet<String>();
		//add elements to HashSet
		hs.add("first");
		hs.add("second");
		hs.add("third");
		System.out.println("My HashSet content:");
		System.out.println(hs);
		System.out.println("Clearing HashSet:");
		hs.clear();
		System.out.println("Content After clear:");
		System.out.println(hs);
	}
}

My HashSet content:
[second, third, first]
Clearing HashSet:
Content After clear:
[]