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();
  }
}