Re: java GUI problems

Chris Smith <>
Wed, 29 Nov 2006 11:25:33 -0700
summer_haven <> wrote:

I've created two seperate GUIs in Java, one of which simply outputs the
current time while the other shows squares moving across the screen.. I
am aiming to to put both GUIs onto one window, so that in the upper box
is the current time and in the lower box is the moving squares. Is this
possible? Any ideas how to go about it?

Yes, it is possible. You are apparently working with AWT applets (it'd
be a good idea to say so in future questions). If you want to put both
of these two things into one applet, then you should modify the code so
that the interesting functionality is not in the Applet class, but in a
subclass of java.awt.Canvas. If you choose the formulaic way of doing
it, then your new Applet will look something like:

public class MyApplet extends Applet
    Clock clock = new Clock();
    SquareBoxes boxes = new SquareBoxes();

    public MyApplet()
        setLayout(new GridLayout());

    public void init()

    public void start()

    public void stop()

    public void destroy()

where Clock is your original Clock applet, modified to subclass Canvas,
and SquareBoxes is the same for your applet with the boxes.

Then you should start cleaning up. It's messy to leave init(), start(),
stop(), and delete() methods in the Canvas subclasses, so look at what
they do and adjust as appropriate. If they don't do anything, you can
take them out. If init() does something, for example, then you may be
able to move it into a constructor, or into an addNotify override.

Hope that helps,

Chris Smith

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