java remove all elements in list

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


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

public class Lautturi {

	public static void main(String[] args) {
		List<Integer> list = new ArrayList<Integer>();
		list.add(3);
		list.add(7);
		list.add(15);
		list.add(8);
		
		System.out.println("list:"+list);
		list.removeAll(list);
		System.out.println("list after removing all elements:"+list);
	}
}

output:

list:[3, 7, 15, 8]
list after removing all elements:[]