d0dd65dd4799001b138cd89f505b592c

《J2ME实用教程》 源文件下载 本书没有仅仅局限于J2ME单机游戏的开发

import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
public class keyDemo  extends Canvas
implements CommandListener
{
public keyDemo ()
{
addCommand(new Command("测试",Command.SCREEN,1)) ;
setCommandListener(this);
}
boolean pressed = false ;
public void paint(Graphics g)
{
g.setColor(125,125,125);
g.fillRect(0,0,getWidth(),getHeight());
if(pressed)
{
g.setColor(0,0,0);
g.drawLine(20,20,120,20);
g.drawLine(20,20,20,100);
g.setColor(255,255,255);
g.drawLine(120,20,120,100);
g.drawLine(20,100,120,100);
}else
{
g.setColor(255,255,255);
g.drawLine(20,20,120,20);
g.drawLine(20,20,20,100);
g.setColor(0,0,0);
g.drawLine(120,20,120,100);
g.drawLine(20,100,120,100);
}
}
public void commandAction(Command c,Displayable s)
{
System.out.println("Command Action");
}
protected void keyPressed(int keycode)
{
System.out.println("Key Pressed");
pressed = true ;
repaint() ;
}
protected void keyReleased(int keycode)
{
System.out.println("Key Released");
pressed = false ;
repaint() ;
}
}