Java remove duplicates from list

/**
 * @author lautturi.com 
 * Java example: how to delete / remove duplicate elements from list in java
 */


import java.util.*;
import java.util.regex.Pattern;

public class Lautturi {

	public static void main(String[] args) {
		List<String> list = new ArrayList<String>();
		list.add("java");
		list.add("python");
		list.add("js");
		list.add("php");
		list.add("hello");
		list.add("python");
		list.add("js");
		list.add("php");

		System.out.println(list);

		HashSet<String> uniqueSet = new HashSet<>(list);
		list.clear();
		list.addAll(uniqueSet);

		System.out.println(list);
	}
}

output:

[java, python, js, php, hello, python, js, php]
[python, java, js, php, hello]