File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Swing / AWT / SWT and the fly likes GUI Example (HFJ) Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Swing / AWT / SWT
Bookmark "GUI Example (HFJ)" Watch "GUI Example (HFJ)" New topic

GUI Example (HFJ)

Mikpo Siru
Ranch Hand

Joined: Apr 09, 2009
Posts: 54

The code from page 371 makes a JFrame, inside of which is a button and a custom widget. The custom widget fills the background black, and also draws an oval whose colour changes randomly when the button is pressed.

What I don't understand is how the custom widgets' width and height attributes are being updated with the JFrames size - even as I resize the frame, becuase I haven't assigned anything to the attributes in code.


Rob Camick
Ranch Hand

Joined: Jun 13, 2009
Posts: 2452
Because you added your panel to the CENTER of a BorderLayout. The panel is automatically resized to occupy all the spaces available to the panel.
I agree. Here's the link:
subject: GUI Example (HFJ)
It's not a secret anymore!