2 Displayable objects, 1 event handler object

Question

Hi there,
I'm working on an application using J2ME and the MIDP profile. I was wondering, is it possible to use 1 event handler object for 2 Displayable objects? Lets say I have a list on one screen and a form on another, can I use 1 event handler object to handle the events for these two elements? I am implementing my event handler in another class, and I am trying to use the same event handler for all my screens, but it does not seem to be functioning. Any hints?
Also, is it advisable to implement the event handler in a separate class for a J2ME application? Does it really make any difference design-wise and efficiency-wise?
I would appreciate the insight..
Thanks

Answer 1

...I would start with adding debug messages in commandAction and in nextScreen:
// debug messages are within System.out.println, do not forget to remove after fix
  public void commandAction(Command s, Displayable x) {
    System.out.println("command: [" + s.getLabel() + "] screen: [" + x.getTitle() + "]" );
    // ...here starts your code...
  public void nextScreen(int x) {
    System.out.println("index: [" + x + "]);
    System.out.println("screen[0] is not null: [" + (screen[0] != null) + "]" );
    System.out.println("screen[0] title: [" + (screen[0].getTitle()) + "]" );
    System.out.println("screen[1] is not null: [" + (screen[1] != null) + "]" );
    System.out.println("screen[1] title: [" + (screen[1].getTitle()) + "]" );
    // ...here starts your code...
{code}
then retry run and check messages shown in WTK console...