How to Remove Set From HashSet

package com.javapro.hashset;

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 hs = ” + hs);

HashSet<String> hs2 = new HashSet<String>();
hs2.add(“java”);
hs2.add(“html”);
hs2.add(“two”);

System.out.println(“hs2 is = ” + hs2);

/*
* Removes from hs set all of its elements that are contained in the hs2
* collection
*/

hs.removeAll(hs2);

System.out.println(“After Remove All hs = ” + hs);

}

}

Output:

Before Remove Element hs = [javascript, php, html, java, mysql]

hs2 is = [two, html, java]

After Remove All hs = [javascript, php, mysql]

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