about java swings

[raja ramesh]

can we implement JButton shape as other than rectangular(like circle,ellipse etc) ?

[Campbell Ritchie]

Don't know. Look at this old thread.

Anybody else able to help? Should this thread be transferred to the Swing forum?

[Brian Cole]

Originally posted by pranaya geetha:
can we implement JButton shape as other than rectangular(like circle,ellipse etc) ?

Sure we can. The thread that Campbell Ritchie mentions says that one
must match the containers background, but I don't think that's the case.

import javax.swing.*;
import java.awt.*;
 
/**
 * demonstrate a circular JButton
 * 
 * @author Brian Cole
 */
public class RoundButton {
 
public static void main(String[] args) {
 
JButton stock = new JButton("Stock");
 
JButton b = new JButton("Round");
b.setIcon(new RoundIcon(Color.YELLOW, 64));
b.setRolloverIcon(new RoundIcon(Color.ORANGE, 64));
b.setPressedIcon(new RoundIcon(Color.PINK, 64));
b.setHorizontalTextPosition(JButton.CENTER);
b.setRolloverEnabled(true);
b.setFocusPainted(false);
b.setBorderPainted(false);
b.setContentAreaFilled(false);
 
JFrame f = new JFrame("round button test");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel p = new JPanel();
p.setBorder(BorderFactory.createEmptyBorder(16, 16, 16, 16));
p.add(stock);
p.add(b);
f.setContentPane(p);
f.pack();
f.setVisible(true);
}
 
/**
 * a round Icon with transparent corners
 */
public static class RoundIcon implements Icon {
private Color color;
private int diam;
 
public RoundIcon(Color color, int diam) {
this.color = color;
this.diam = diam;
}
public int getIconHeight() {
return diam;
}
public int getIconWidth() {
return diam;
}
public void paintIcon(Component c, Graphics g, int x, int y) {
g.setColor(color);
g.fillArc(x, y, diam, diam, 0, 360);
}
}
 
}

note: Even though the corners are transparent, the button will still
react to clicks/rollovers on those corners.