gamewincanvas.java

这是我买的一本J2me手机游戏设计的一本书里的例子

import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.GameCanvas;
public class GameWinCanvas extends GameCanvas implements Runnable
{
    private LLKCanvas canvas;
    private int level;
    private Thread myThread;
    private int x;
    private int len;
    private Image imgCong;
    private Image imgWon;
    private static final int MILLIS_PER_TICK = 100;
    public GameWinCanvas(LLKCanvas canvas, int level)
    {
        super(false);
        this.canvas = canvas;
        this.level = level;
        x = 0;
        try
        {
            if (level < 2)
                imgWon = Image.createImage("/won.png");
            else
                imgWon = Image.createImage("/wonall.png");
            Image img = Image.createImage("/cong.png");
            len = img.getWidth();
            imgCong = Image.createImage(len + getWidth() * 2, img.getHeight());
            imgCong.getGraphics().setColor(0);
            imgCong.getGraphics().fillRect(0, 0, imgCong.getWidth(),
                imgCong.getHeight());
            imgCong.getGraphics().drawImage(img, getWidth(), 0, 0);
            img = null;
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        x = getWidth();
    }
    synchronized void start()
    {
        myThread = new Thread(this);
        myThread.start();
    }
    synchronized void stop()
    {
        myThread = null;
    }
    public void run()
    {
        Thread currentThread = Thread.currentThread();
        try
        {
            while (currentThread == myThread)
            {
                long startTime = System.currentTimeMillis();
                repaint();
                serviceRepaints();
                long timeTaken = System.currentTimeMillis() - startTime;
                if (timeTaken < 100L)
                {
                    synchronized(this)
                    {
                        wait(100L - timeTaken);
                        x = x + 1;
                        if (x > getWidth() + len)
                        {
                            x = 0;
                        }
                    }
                }
                else
                {
                    Thread _tmp = currentThread;
                    Thread.yield();
                }
            }
        }
        catch (InterruptedException e){}
    }
    public void paint(Graphics g)
    {
        g.setColor(0);
        g.fillRect(0, 0, getWidth(), getHeight());
        g.setColor(255, 255, 255);
        Image img = Image.createImage(imgCong, x, 0, getWidth(),
            imgCong.getHeight(), 0);
        g.drawImage(img, 0, 25, 0);
        img = null;
        g.drawImage(imgWon, (getWidth() - imgWon.getWidth()) / 2, 55, 0);
        if (level == 0)
        {
            g.drawString("还有中等级别的游戏等着您通过哦！", 5, 120, 0);
        }
        else
        if (level == 1)
        {
            g.drawString("还有高级别的游戏等着您通过哦！", 5, 120, 0);
        }
    }
    public void keyPressed(int keyCode)
    {
        keyCode = getGameAction(keyCode);
        if (keyCode == 8)
        {
            canvas.goMainMenu();
        }
    }
}