Java绘制自定义按钮

public class Test01 { public static void main(String args[]) { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(300, 300); JPanel panel = new JPanel(); JButton button = new MyButton2("Button"); button.setFocusable(false); button.setBorderPainted(false); button.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { System.out.println("Button is clicked"); } }); panel.add(button); frame.getContentPane().add(panel); frame.setVisible(true); } } class MyButton2 extends JButton { private static final long serialVersionUID = 1965063150601339314L; public MyButton2(String text) { super(text); setOpaque(false); setContentAreaFilled(false); // 这一句非常重要, 否则父类还会绘制按钮的区域. } @Override protected void paintComponent(Graphics g) { int width = this.getWidth(); int height = this.getHeight(); Graphics2D g2d = (Graphics2D) g; g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.setColor(Color.GRAY); g2d.fillRoundRect(0, 0, width, height, 20, 20); super.paintComponent(g); // 最后调用这个方法, 让父类绘制在按钮上绘制文字. } }  

Blur一个按钮:

class MyButton2 extends JButton { private static final long serialVersionUID = 1965063150601339314L; public MyButton2(String text) { super(text); // setOpaque(false); // setContentAreaFilled(false); // 这一句非常重要, 否则父类还会绘制按钮的区域. } @Override protected void paintComponent(Graphics g) { BufferedImage buf = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_RGB); super.paintComponent(buf.getGraphics()); float[] my_kernel = { 0.10f, 0.10f, 0.10f, 0.10f, 0.20f, 0.10f, 0.10f, 0.10f, 0.10f }; ConvolveOp op = new ConvolveOp(new Kernel(3, 3, my_kernel)); Image img = op.filter(buf, null); g.drawImage(img, 0, 0, null); } } 

class ImageButton extends JButton { private static final long serialVersionUID = 1965063150601339314L; Image image = new ImageIcon("v4.png").getImage(); public ImageButton(String text) { super(text); setOpaque(false); setFocusable(false); setBorderPainted(false); this.setPreferredSize(new Dimension(image.getWidth(this), image .getHeight(this))); } @Override protected void paintComponent(Graphics g) { g.drawImage(image, 0, 0, null); } }