java get map keys into list

/**
 * @author lautturi.com 
 * Java example: java get map key into list
 */


import java.util.*;

public class Lautturi {

	public static void main(String[] args) {

		Map<Integer, String> map = new HashMap<Integer, String>();

		map.put(5, "Apple");
		map.put(7, "banana");
		map.put(1, "Cherry");
		map.put(33, "Orange");
		map.put(9, "pear");
		map.put(23, "Lautturi");

		List<Integer> list = new ArrayList<Integer>(map.keySet());

		System.out.println("Map: " + map);
		System.out.println("List of Keys: " + list);

	}
}

output:

Map: {1=Cherry, 33=Orange, 5=Apple, 7=banana, 23=Lautturi, 9=pear}
List of Keys: [1, 33, 5, 7, 23, 9]