Java convert hashset to array

/**
 * @author lautturi.com
 * Java example: hashset toArray 
 */

import java.util.*;

public class Lautturi {

	public static void main(String[] args) {
		Set<Integer> set = new HashSet<>();
		set.add(1);
		set.add(2);
		set.add(3);
		
		Integer[] arr = set.toArray(new Integer[set.size()]);
		for (Integer i : arr) {
			System.out.print(i+" ");
		}
		
	}
}

output:

1 2 3