public class HelloWorld
{

  public static void main(String[] args)
  {
    Blub blub = new Blub();
    blub.x = 8;
    yolo(blub);
    System.out.println(blub.x);
    bar(blub);
    System.out.println(blub.x);
  }

  private static void yolo(Blub blub){
      blub = new Blub();
      System.out.println(blub.x);
  }

  private static void bar(Blub blub){
      blub.x = 1337;
  }

}

class Blub
{
    public int x = 42;
}