java中的键盘事件

 

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.Rectangle2D;

import javax.swing.*;
/**
 * @version 1.0.2 2010-04-08
 * @author liangdong HIT
 */

 

public class MoveTest
{
 public static void main(String[] args)
 {
  EventQueue.invokeLater(new Runnable()
  {
   public void run()
   {
    MoveFrame frame = new MoveFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setVisible(true);
   }
  });
 }
}
 /**
  * frame
  */
 class MoveFrame extends JFrame
 {
  /**
   * cancel warning
   */
  private static final long serialVersionUID = 1L;
  public MoveFrame()
  {
  setTitle("MoveTest");
  setBounds(STARTX, STARTY, DEFAULT_WIDTH, DEFAULT_HEIGHT);
  
  
  MovePanel panel = new MovePanel();
  add(panel);  
  }
  public static final int STARTX=100;
  public static final int STARTY=100;
  public static final int DEFAULT_WIDTH=800;
  public static final int DEFAULT_HEIGHT=600;

 }
 /**
  * panel
  */
 class MovePanel extends JPanel
 {
  /**
   * cancel warning
   */
  private static final long serialVersionUID = 1L;
  public MovePanel()
  {
   setLayout(new BorderLayout());
   Action insert = new MoveAction();
   x1=100;
   y1=100;
   x2=540;
   y2=460;
   choice = 1;
   lu=new Rectangle2D.Double(x1,y1,40,40);
   wu=new Rectangle2D.Double(x2,y2,40,40);
   

   
   InputMap imap = this.getInputMap();
   imap.put(KeyStroke.getKeyStroke('1'),"rr");
   imap.put(KeyStroke.getKeyStroke('2'),"rb");
   imap.put(KeyStroke.getKeyStroke('w'),"up");
   imap.put(KeyStroke.getKeyStroke('s'),"down");
   imap.put(KeyStroke.getKeyStroke('a'),"left");
   imap.put(KeyStroke.getKeyStroke('d'),"right");
  
   
   
   ActionMap amap= this.getActionMap();
   amap.put("rr", insert);
   amap.put("rb", insert);
   amap.put("up", insert);
   amap.put("down", insert);
   amap.put("left", insert);
   amap.put("right", insert);
   
  }
  public void paintComponent(Graphics g)
  {
   super.paintComponent(g);
   Graphics2D g2 = (Graphics2D)g;
   g2.setColor(Color.RED);
   g2.fill(lu);
   g2.setColor(Color.BLACK);
   g2.fill(wu);
  }

  

 private class MoveAction extends AbstractAction {
  /**
   * cancel warning
   */
  private static final long serialVersionUID = 1L;

  public void actionPerformed(ActionEvent event) {
   String input = event.getActionCommand();
   if (input.equals("1"))
    choice = 1;
   else if (input.equals("2"))
    choice = 2;
   if (choice==1) {
    if (input.equals("w") && y1 > 100)
     y1 = y1 - 40;
    else if (input.equals("s") && y1 < 450)
     y1 = y1 + 40;
    else if (input.equals("a") && x1 > 100)
     x1 = x1 - 40;
    else if (input.equals("d") && x1 < 540)
     x1 = x1 + 40;
    lu.setRect(x1, y1, 40, 40);
    repaint();
   } else if(choice == 2) {
    if (input.equals("w") && y2 > 100)
     y2 = y2 - 40;
    else if (input.equals("s") && y2 < 460)
     y2 = y2 + 40;
    else if (input.equals("a") && x2 > 100)
     x2 = x2 - 40;
    else if (input.equals("d") && x2 < 540)
     x2 = x2 + 40;
    wu.setRect(x2, y2, 40, 40);
    repaint();
   }
  }
 }
  private Rectangle2D lu;
  private Rectangle2D wu;
  private int choice;
  private double x1;
  private double y1;
  private double x2;
  private double y2;

}