java remove elements from hashset

/**
 * @author lautturi.com 
 * Java example: removing element of LinkedHashSet in java
 */

import java.util.*;

public class Lautturi {

	public static void main(String[] args) {

		LinkedHashSet<Integer> numbers = new LinkedHashSet<>();

        numbers.add(1);
        numbers.add(2);
        numbers.add(3);
        numbers.add(4);
        numbers.add(5);
        
        System.out.println("LinkedHashSet: " + numbers);

        boolean value1 = numbers.remove(5);
        System.out.println("Is 5 removed? " + value1);

        boolean value2 = numbers.removeAll(numbers);
        System.out.println("Are all elements removed? " + value2);

	}
}

output:

LinkedHashSet: [1, 2, 3, 4, 5]
Is 5 removed? true
Are all elements removed? true