class Main1 {

  public static void main(String args[]) {

    MyVector u1, v1;
    
    u1 = new MyVector(1, 3);
    v1 = new MyVector(3, 1);
    
    System.out.println("vector u1 = " + u1);
    System.out.println("vector v1 = " + v1);

    System.out.println("Vaihdetaan vektorit keskenään");
    MyVector.swap_1(u1,v1);
    System.out.println("vector u1 = " + u1);
    System.out.println("vector v1 = " + v1);

    System.out.println("Vaihdetaan vektorit takaisin");
    v1.swap_2(u1);
    System.out.println("vector u1 = " + u1);
    System.out.println("vector v1 = " + v1);
    
    System.out.println("Vaihdetaan vektorit vielä kerran");
    u1.swap_3(v1);
    System.out.println("vector u1 = " + u1);
    System.out.println("vector v1 = " + v1);
    
  }




}