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    <p>JDC Tech Tips: August 26, 1999: <a href="http://java.sun.com/developer/TechTips/1999/tt0826.html" rel="noreferrer">Creating Round Swing Buttons</a></p> <pre><code>import java.awt.*; import java.awt.geom.*; import javax.swing.*; public class RoundButton extends JButton { public RoundButton(String label) { super(label); // These statements enlarge the button so that it // becomes a circle rather than an oval. Dimension size = getPreferredSize(); size.width = size.height = Math.max(size.width, size.height); setPreferredSize(size); // This call causes the JButton not to paint // the background. // This allows us to paint a round background. setContentAreaFilled(false); } // Paint the round background and label. protected void paintComponent(Graphics g) { if (getModel().isArmed()) { // You might want to make the highlight color // a property of the RoundButton class. g.setColor(Color.lightGray); } else { g.setColor(getBackground()); } g.fillOval(0, 0, getSize().width-1, getSize().height-1); // This call will paint the label and the // focus rectangle. super.paintComponent(g); } // Paint the border of the button using a simple stroke. protected void paintBorder(Graphics g) { g.setColor(getForeground()); g.drawOval(0, 0, getSize().width-1, getSize().height-1); } // Hit detection. Shape shape; public boolean contains(int x, int y) { // If the button has changed size, // make a new shape object. if (shape == null || !shape.getBounds().equals(getBounds())) { shape = new Ellipse2D.Float(0, 0, getWidth(), getHeight()); } return shape.contains(x, y); } // Test routine. public static void main(String[] args) { // Create a button with the label "Jackpot". JButton button = new RoundButton("Jackpot"); button.setBackground(Color.green); // Create a frame in which to show the button. JFrame frame = new JFrame(); frame.getContentPane().setBackground(Color.yellow); frame.getContentPane().add(button); frame.getContentPane().setLayout(new FlowLayout()); frame.setSize(150, 150); frame.setVisible(true); } } </code></pre>
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    1. COThis doesn't work on OS X 10.7.5. It comes out as a big square button with a circle inside it. This works much better: http://java-swing-tips.blogspot.com/2008/07/create-round-image-jbutton.html
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