Hey all, here's a problem I can't lick.

Using just a basic JFrame, it should have a basic BorderLayout layout
manager by default.  The docs strongly imply it, and it's manifest in
the code (source and runtime).

However, if I add my own component to the content pane, the JFrame when
displayed is as small as possible, only just large enough to display
it's decorations.  I implement all the size methods, and it still
doesn't seem to do anything with them.

Does anyone know what I might be doing wrong?

Sample code follows.  If I print out the classes involved (the first and
the second commented-out blocks) everything is as you'd expect.  A
BorderLayout is present by default.

If I manually set the size of the content pane (first and third
commented-out blocks), the display is correct.

/*
 * Captcha.java
 *
 * Created on Oct 3, 2007, 12:38:11 PM
 *
 */

package captcha.oak;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.LayoutManager;
import java.awt.image.BufferedImage;
import javax.swing.JFrame;
import static javax.swing.WindowConstants.*;

public class Captcha extends java.awt.Component {

    private static final int WIDTH = 250;
    private static final int HEIGHT = 85;
    private BufferedImage image;

    /** Creates and displays a test captcha.
     *
     * @param args The command line arguments are ignored.
     */
    public static void main(String[] args) {
        // TODO code application logic here
        Captcha c = new Captcha();
        JFrame jf = new JFrame("Captcha");

        jf.setDefaultCloseOperation(EXIT_ON_CLOSE);
        jf.getContentPane().add(c, BorderLayout.CENTER);

//        java.awt.Container cp = jf.getContentPane();

//        LayoutManager lm = cp.getLayout();
//        System.err.println( cp.getClass().getName()+":: "+cp);
//        System.err.println( lm.getClass().getName()+"::"+lm );
//        System.err.println( lm.getClass().getSuperclass().getName());

//        cp.setPreferredSize(c.getPerferredSize());

        jf.pack();

        jf.setVisible(true);
    }

    public Captcha() {

        int[] data = new int[WIDTH * HEIGHT];

        for (int i = 0; i < data.length; i++) {
            int red = randomInt(255);
            int green = randomInt(255);
            int blue = randomInt(255);
            data[i] = (red << 16) | (green << 8) | blue;
        }
        this.image = new BufferedImage(WIDTH, HEIGHT,
BufferedImage.TYPE_INT_RGB);
        image.setRGB(0, 0, WIDTH, HEIGHT, data, 0, WIDTH);
    }

    private int randomInt(int i) {
        return (int) (java.lang.Math.random()* i);
    }

    public void paint(Graphics g) {
        g.drawImage(image, 0, 0, this);
    }

    public Dimension getPerferredSize()
    {
        return getSize();
    }
    public Dimension getSize()
    {
        return new Dimension(WIDTH,HEIGHT);
    }

    public Dimension getMaximumSize()
    {
        return getSize();
    }

    public Dimension getMinimumSize()
    {
        return getSize();
    }
}