Write a Java Program to Calculate the difference between two sets

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import java.util.HashSet;
import java.util.Set;

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

    // create first set
    Set<Integer> numbers = new HashSet<>();
    numbers.add(1);
    numbers.add(2);
    numbers.add(3);
    numbers.add(4);
    System.out.println("Numbers: " + numbers);

    // create second set
    Set<Integer> primeNumbers = new HashSet<>();
    primeNumbers.add(2);
    primeNumbers.add(3);
    System.out.println("Prime Numbers: " + primeNumbers);

    // Difference between HashSet1 and HashSet2
    numbers.removeAll(primeNumbers);
    System.out.println("Numbers without prime numbers: " + numbers);
    }
}