keyandpointerdemo.java

《精通JAVA手机游戏与应用程序设计》随书光盘

import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

public class KeyAndPointerDemo extends MIDlet implements CommandListener
{

    private Command exitCommand;
    private DemoCanvas myCanvas;
    public KeyAndPointerDemo()
    {
        exitCommand =new Command("Exit",Command.EXIT,1);
        myCanvas =new DemoCanvas();
        myCanvas.addCommand(exitCommand);
        myCanvas.setCommandListener(this);
    }
    protected void startApp(  ) throws MIDletStateChangeException
    {
        Display.getDisplay(this).setCurrent(myCanvas);
    }

    protected void pauseApp()
    {
    }

    protected void destroyApp( boolean p1 )
    {
    }

    public void commandAction(Command c,Displayable d)
    {
        if (c ==exitCommand)
        {
            destroyApp(false);
            notifyDestroyed();
        }
    }
  
   class DemoCanvas extends Canvas
    { 
        protected  void keyPressed(int keyCode) 
        {
        	System.out.println( "keyPressed");
         
        }
        protected  void keyReleased(int keyCode) 
        {
        	System.out.println( "keyReleased ");
           
        }
        protected  void keyRepeated(int keyCode) 
        {
        	System.out.println( "keyRepeated");
           
        }
        protected  void pointerDragged(int x, int y) 
        {
        	System.out.println( "pointerDragged ");
           
        }
        protected  void pointerPressed(int x, int y) 
        {
        	System.out.println( "pointerPressed ");
           
        }
        protected  void pointerReleased(int x, int y) 
        {
        	System.out.println( "pointerReleased ");
          
        }
		
		protected void paint(Graphics g) {			
			
		}
    }
}