swing调色板

public class JColorChooserDemo extends JFrame {

    private Container container; // 容器
    private JPanel colorPanel; // 用于反映颜色变化的面板

    public JColorChooserDemo() { // 构造函数
	super("调色板演示"); // 调用JFrame的构造函数
	container = getContentPane(); // 得到容器
	colorPanel = new JPanel(); // 初始化面板
	final JButton selectColorButton = new JButton("选取颜色"); // 初始化颜色选择按钮
	final JTextField jt = new JTextField();

	jt.addActionListener(new ActionListener() {
	    @Override
	    public void actionPerformed(ActionEvent e) {
		String cmd = jt.getText();
		Random r = new Random();
		if (cmd.equals("r")) {
		    int red = r.nextInt(256);
		    int green = r.nextInt(256);
		    int blue = r.nextInt(256);
		    colorPanel.setBackground(new Color(red, green, blue));
		    selectColorButton.setText((red + "," + green + "," + blue));
		} else if (cmd.contains("*") && cmd.contains(",")) {
		    while (cmd.contains("*"))
			cmd = cmd.replaceFirst("\\*", r.nextInt(256) + "")
				.toString();
		    String[] c = cmd.split(",");
		    colorPanel.setBackground(new Color(Integer.valueOf(c[0]),
			    Integer.valueOf(c[1]), Integer.valueOf(c[2])));
		    selectColorButton.setText((c[0] + "," + c[1] + "," + c[2]));
		}
	    }
	});

	selectColorButton.addActionListener( // 为颜色选择按钮增加事件处理
		new ActionListener() {
		    public void actionPerformed(ActionEvent event) {

			Color color = JColorChooser
				.showDialog(JColorChooserDemo.this, "选取颜色",
					Color.lightGray); // 得到选择的颜色
			if (color == null) // 如果未选取
			    color = Color.gray; // 则设置颜色为灰色
			colorPanel.setBackground(color); // 改变面板的背景色
			jt.setText(color.getRed() + "," + color.getGreen()
				+ "," + color.getBlue());
		    }

		});
	container.add(selectColorButton, BorderLayout.NORTH); // 增加组件
	container.add(colorPanel, BorderLayout.CENTER); // 增加组件
	container.add(jt, "South");
	setSize(400, 230); // 设置窗口尺寸
	setLocationRelativeTo(null); // 正中显示
	setVisible(true); // 设置窗口可见
	setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 关闭窗口时退出程序
    }

    public static void main(String args[]) {
	new JColorChooserDemo();
    }

}

很不错的swing调色板。