import javax.microedition.lcdui.*;

import javax.microedition.midlet.*;

public class DrawCanvas extends MIDlet implements CommandListener {

private Command exitCommand;

private HCanvas sg;

public DrawCanvas() {

exitCommand = new Command("Exit", Command.EXIT, 1);

sg = new HCanvas();

sg.addCommand(exitCommand);

sg.setCommandListener(this);

Display.getDisplay(this).setCurrent(sg);



}

protected void startApp(){

}

protected void pauseApp() {

}

protected void destroyApp(boolean arg0){

}

public void commandAction(Command c, Displayable d) {

if (c == exitCommand) {

destroyApp(false);

notifyDestroyed();

}

}

}

class HCanvas extends Canvas implements Runnable{



private String str=new String("PRESS 5");

private int[] ak={0,0,0,0,0,0,0,1,2,3,3,2,1,0,0,0,0,0,0,0};

boolean kaishi=true;

private int k=6;



public HCanvas (){

new Thread(this).start();

}



protected void paint(Graphics g){

g.setColor(0x00ffffff);

g.fillRect(0,0,getWidth(),getHeight());

g.setColor(0x00000000);

for(int i=0;i< str.length();i++){

g.drawString(str.substring(i,i+1),20+i*7,10-ak[k-i],0);

g.drawString(str.substring(i,i+1),21+i*7,11-ak[k-i],0);//加重字体7是字体宽度

}

}

public void run(){

while(kaishi){

try {

repaint();    //再描绘

Thread.sleep(70);  //等待一定时间

k++;

if(k>(ak.length-1)) k=6;

}

catch(InterruptedException e){}

}

}

}