partialpaintdemo.java~1~

java手机程序开发随书光盘源代码

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

public class PartialPaintDemo extends MIDlet{

	Display display;
	MyCanvas myCanvas;
	
	public PartialPaintDemo(){
		display = Display.getDisplay(this);
		myCanvas = new MyCanvas();
	}

	public void startApp(){
		display.setCurrent(myCanvas);
		myCanvas.start();
	}

	public void pauseApp(){
	}

	public void destroyApp(boolean unconditional){
	}

}

class MyCanvas extends Canvas implements CommandListener{

	Ball[] balls = new Ball[2];
	Command fastCmd, slowCmd;
	
	public MyCanvas(){
		
		fastCmd = new Command("