How do i get the width of a JPanel

Question

Hey
Im trying to get the width of my JPanel with this code, but it just prints 0, what am i doing wrong?
public class GamePanel extends JPanel implements Runnable {
     private static final int PWIDTH = 500;   // size of panel
     private static final int PHEIGHT = 400;
     private static final int NO_DELAYS_PER_YIELD = 16;     
     private static int MAX_FRAME_SKIPS = 5;
     private MovingGame frame;
     private Thread animator;
     private volatile boolean running = false;   // used to stop the animation thread
     private long gameStartTime;   // when the game started
     private BallSprite ball;
     //      off-screen rendering
     private Graphics dbg;
     private Image dbImage = null;
     //      holds the background image
     private BufferedImage bgImage = null;
     public GamePanel(MovingGame frame){     
          this.frame = frame;
          setDoubleBuffered(true);
          setBackground(Color.blue);
          setPreferredSize( new Dimension(PWIDTH, PHEIGHT));
          setFocusable(true);
          requestFocus();
          addKeyListener( new KeyAdapter() {
               public void keyPressed(KeyEvent e)
                   { processKey(e);  }
          ball = new BallSprite(40, 40, this);
          System.out.println("Width: " + getWidth());    <------- this prints 0
     }

Answer 1

veldhanas wrote:
Hi,
Use
setSize(PWIDTH, PHEIGHT); instead of
setPreferredSize( new Dimension(PWIDTH, PHEIGHT));ThanksWrong Wrong Wrong Wrong
.setSize() sets the size of the component at that instant in time and has no effect on anything the layout managers do with the component. .setPreferredSize() sets the size the layout manager will look at (assuming it cares about what size you want the component at).