// This example is a code fragment, 
// it will not compile on its own.

// Create the Button subclass from
// the DragDrop class. DragDrop becomes
// the superclass of Button.
class DragDrop extends Button {
  int xoff, yoff;
  DragDrop(int x, int y) {
    // Runs the superclass' constructor
    super(x, y);
  }
  void press(int mx, int my) {
    // Runs the superclass' press() method
    super.press();  
    xoff = mx;
    yoff = my;  
  }
}