Java how to remove duplicates in a list

/**
 * @author lautturi.com
 * Java example: remove duplicates from list in java
 */
import java.util.*;
import java.util.stream.Collectors;
import com.google.common.collect.Lists;

public class Lautturi {

	public static void main(String[] args) {
		List<Integer> list = Lists.newArrayList(1, 1, 2, 2, 3, 3);
	    List<Integer> newlist = list.stream()
	     .distinct()
	     .collect(Collectors.toList());
	    
		System.out.println(newlist);
		
	}
}

output:

[1, 2, 3]