16. 31. 1. Create Disabled Image from GrayFilter

import java.awt.Image; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import javax.swing.GrayFilter; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; public class GrayFilterDemo extends JFrame { /** * 一个图像过滤器，它通过将图像转换成灰度级图像并增亮图像中的像素来“禁用”图像。 * 按钮可使用该过滤器为禁用的按钮创建一个图像。 */ public GrayFilterDemo() { setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel p = new JPanel(); ImageIcon icon = new ImageIcon("E:\\java\\Test\\icon\\44.png"); JButton b1 = new JButton("Regular", icon); p.add(b1); //构造一个 GrayFilter 对象，该对象将彩色图像过滤成灰度级图像 Image image = GrayFilter.createDisabledImage(icon.getImage()); JButton b2 = new JButton("GrayFilter", new ImageIcon(image)); p.add(b2); getContentPane().add(p); pack(); setVisible(true); } public static void main(String arg[]) { new GrayFilterDemo(); } }