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Example of contains method of hashset in java.

Example of contains method of hashset in java.

Example of contains method of hashset in java.

The contains() is a method of hashset. It is used for checking that the given number is available in hashset or not. It returns only boolean value.If number is present in hashset, it returns true otherwise false.


HashSetToArray .java

package net.roseindia;

import java.util.HashSet;

public class HashSetToArray {

public static void main(String[] arg) {

HashSet obHashSet = new HashSet();

obHashSet.add(new Integer(1));

obHashSet.add(new Integer(2));

obHashSet.add(new Integer(3));

obHashSet.add(new Integer(4));

System.out.println("All Elements in HashSet : " + obHashSet);

/*Check element is present or not in Hash set */

boolean b=obHashSet.contains(new Integer(3));

System.out.println("Result : "+ b);



Output :

All Elements in HashSet : [1, 2, 3, 4]

Result : true


Posted on: April 4, 2011 If you enjoyed this post then why not add us on Google+? Add us to your Circles

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