How to remove all element from HashSet

We can remove all element from HashSet using clear() method . Clear () method of set removes all of the elements from this set. The set will be empty after this call returns.

Syntax :

public void clear() {

}

Let’s see set clear() method example in java

import java.util.HashSet;
import java.util.Set;

public class RemoveAll {

public static void main(String[] args) {

Set<String> hs = new HashSet<String>();
hs.add("java");
hs.add("php");
hs.add("html");
hs.add("javascript");
hs.add("mysql");

//print hashset
System.out.println("Before Remove element hashset is = "+hs);

/*
* Removes all of the elements from  set
*/
hs.clear();

System.out.println("After Remove elements hashset is ="+hs);

}

}

Output:

Before Remove element hashset is = [javascript, php, html, java, mysql]

After Remove elements hashset is =[]

A Guide To HashSet

Leave a Reply

Your email address will not be published. Required fields are marked *

+ 61 = 64