Wed Feb 11, part two: a button that closes the program!

OK, now you've got an application with a frame that cannot close itself and doesnt do anything EVEN THOUGH it has an "actionPerformed" statement. Let's fix that, and give it a button that can shut down the program in a simple way. Here's what you need to do:


A) just below the line where you declared a Frame:
Frame one;


add this line to declare a button
Button exit;


B) add the button to the frame. You should know the three important lines of code used to add a button to a frame by now; just make you type them in directly below this line:

one.setLayout(new FlowLayout());

C) Tell this button how to close the whole program by adding this code block to the actionPerformed method:

if (e.getSource() == exit)
{//add
System.exit(0); //thats a zero in there, not an O
}// All over, let's quit



Re-compile your program then run it to see if the button shuts it all down!



Cheers,
Uncle Paulie