loop through map/hashmap in java

/**
 * @author lautturi.com 
 * Java example: iterate through map/hashmap in java 
 */

import java.util.*;

public class Lautturi {
	public static void main(String[] args) {

		Map<Integer, String> map = new HashMap<Integer, String>();
		map.put(1, "Java");
		map.put(2, "Python");
		map.put(3, "C++");
		map.put(4, "1autturi.com");
		map.put(5, "JavaScript");

		for (Integer key : map.keySet()) {
			System.out.println("key:" + key);
		}

		for (Map.Entry<Integer, String> entry : map.entrySet()) {
			System.out.println(entry.getKey() + " " + entry.getValue());
		}

	}
}

output:

key:1
key:2
key:3
key:4
key:5
1 Java
2 Python
3 C++
4 1autturi.com
5 JavaScript