Java remove duplicates from list

/**
 * @author lautturi.com 
 * Java example: remove duplicate elements of list in java
 */

import java.util.*;

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

		List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 3, 4, 5, 2, 7);

		System.out.println(numbers);

		Set<Integer> hashSet = new LinkedHashSet(numbers);
		List<Integer> newList = new ArrayList(hashSet);

		System.out.println(newList);
	}
}

output:

[1, 2, 3, 4, 3, 4, 5, 2, 7]
[1, 2, 3, 4, 5, 7]