class IntDemoRunner {
  public static void main(String[] args){
    IntDemo d = new IntDemo();
    d.demoInt();           //Does "nothing"...
    int x = d.demoInt();   //Can be observed!  
    System.out.println(x); //Output x to console

    System.out.println(d.demoBool()); //More output
  } 
}