GUI动作实例

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class ActionTest
{
 public static void main(String[] args)
 {
  ActionFrame frame = new ActionFrame();
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  frame.show();
 }
}

class ActionFrame extends JFrame
{
 public ActionFrame()
 {
  setTitle("ActionTest");
  setSize(DEFAULT_WIDTH,DEFAULT_HEIGHT);
  
  //add panel to frame
  ActionPanel panel = new ActionPanel();
  Container contentPane = getContentPane();
  contentPane.add(panel);
 }
 
 public static final int DEFAULT_WIDTH = 300;
 public static final int DEFAULT_HEIGHT = 200;
}

class ActionPanel extends JPanel
{
 public ActionPanel()
 {//定义动作
    Action yellowAction = new ColorAction("Yellow",
       new ImageIcon("yellow.gif"),
       Color.YELLOW); 
    Action blueAction = new ColorAction("Blue",
       new ImageIcon("blue.gif"),
       Color.BLUE);
    Action redAction = new ColorAction("Red",
       new ImageIcon("red.gif"),
       Color.RED);
    //增加按钮到动作   
    add(new JButton(yellowAction));
    add(new JButton(blueAction));
    add(new JButton(redAction));
    //将Y、B、R与其名字相对应
    InputMap imap = getInputMap(
      JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
     
    imap.put(KeyStroke.getKeyStroke("ctrl Y"),"panel.yellow");
    imap.put(KeyStroke.getKeyStroke("ctrl B"),"panel.blue");
    imap.put(KeyStroke.getKeyStroke("ctrl R"),"panel.red");
    //将名字与动作相对应
    ActionMap amap = getActionMap();
    amap.put("panel.yellow",yellowAction);
    amap.put("panel.blue",blueAction);
    amap.put("panel.red",redAction);
   
 }
 
 public class ColorAction extends AbstractAction
 {
  public ColorAction(String name ,Icon icon,Color c)
  {
   putValue(Action.NAME,name);
   putValue(Action.SMALL_ICON,icon);
   putValue(Action.SHORT_DESCRIPTION,
       "set panel color to " + name.toLowerCase());
   putValue("color",c);
   
  }
  
  public void actionPerformed(ActionEvent event)
  {
   Color c = (Color)getValue("color");
   setBackground(c);
  }
 }
  
}