Example of keySet method of HashMap.

Home Tutorial Java Core HashMap Example of keySet method of HashMap.

Example of keySet method of HashMap.
Posted on: April 5, 2011 at 12:00 AM

Example of keySet method of HashMap.

In this example, we will introduce to you about the keySet method of HashMap. It returns a Set of keys of HashMap.

Code:

HashMapKeySet.java

package net.roseindia.java;

import java.util.HashMap;

import java.util.Set;

public class HashMapKeySet {

public static void main(String[] arr) {

/* Create object of HashMap */

HashMap<Integer, String> obHashMap = new HashMap<Integer, String>();

/* Strore value in HashMap */

obHashMap.put(new Integer(1), "AAA");

obHashMap.put(new Integer(2), "BBB");

obHashMap.put(new Integer(3), "CCC");

obHashMap.put(new Integer(4), "DDD");

obHashMap.put(new Integer(5), "EEE");

/* Create a set of keys of hashmap */

Set obKeySet = obHashMap.keySet();

System.out.println("Set of Keys : " + obKeySet); } }

Output :

Set of Keys : [1, 2, 3, 4, 5]

Related Tags for Example of keySet method of HashMap.:

«Previous Index Next»

If you are facing any programming issue, such as compilation errors or not able to find the code you are looking for.

Ask your questions, our development team will try to give answers to your questions.

Tutorial Topics