🚀 go-pugleaf

Tor Iver Wilhelmsen wrote:
> 
> Leo Cohen <lcohen@cs.virginia.edu> writes:
> 
> > Therefore, given (Object v), how can I dispose() of v?
> 
> try {
>   ((Frame) v).dispose();
> }
> catch (ClassCastException cce) {
>   System.out.println("Hey! "+v+" isn't a Frame!?");
> }
> 
> Or, more complicated (using java.lang.reflect.*)
> 
> try {
>    Method m = v.getClass().getMethod("dispose", new Class[] {});
>    m.invoke(v, new Object[] { });
> }
> catch (Exception e) { // A catch-all
>   e.printStackTrace();
> }

Or:

  void disposeFrame(Object o) {
    if ( o instanceof Frame ) {
      System.out.println("disposing frame");
      ((Frame)o).dispose();
    }
  }

Try it out:

  disposeFrame(new com.sun.java.swing.JFrame());
  disposeFrame(new Frame());
  disposeFrame(new ListControl()); 
  disposeFrame(new DecoratedFrame());

Look at the output in the Execution Log window.
All but the third will result in a print out:

  disposing frame

Note that with the disposal of the DecoratedFrame, 
the application will quit since that is the default
behavior upon disposing of a DecoratedFrame [see
DecoratedFrame.isExitOnClose()].


Paul Furbacher