无需重新发明轮子。而是使用
JToggleButton（适当配置）。一个按钮将同时响应鼠标 和 键盘输入。
import java.awt.*;import java.net.*;import javax.imageio.ImageIO;import javax.swing.*;class ChangeImageonClick { public static void main(String[] args) throws Exception { URL url1 = new URL("http://i.stack.imgur.com/gJmeJ.png"); final Image img1 = ImageIO.read(url1); URL url2 = new URL("http://i.stack.imgur.com/wCF8S.png"); final Image img2 = ImageIO.read(url2); Runnable r = new Runnable() { @Override public void run() { JToggleButton btn = new JToggleButton("Click me!"); btn.setIcon(new ImageIcon(img1)); btn.setSelectedIcon(new ImageIcon(img2)); btn.setContentAreaFilled(false); btn.setBorderPainted(false); JOptionPane.showMessageDialog(null, btn); } }; SwingUtilities.invokeLater(r); }}
