J2me制作會(huì)動(dòng)的波浪字體方法及代碼

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);//加重字體7是字體寬度
    }
    }
    public void run(){
    while(kaishi){
    try {
    repaint(); //再描繪
    Thread.sleep(70); //等待一定時(shí)間
    k++;
    if(k>(ak.length-1)) k=6;
    }
    catch(InterruptedException e){}
    }
    }
    }