mygamecanvas.java

Tank 手机游戏 J2ME 简单么明了

package hello;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.game.GameCanvas;
public class MyGameCanvas extends GameCanvas 
        implements CommandListener, Runnable
{
    protected int testInt=0;
    String text="";
    String key="initial";
    public MyGameCanvas(boolean b)
    {
        super(b);
        Command command=new Command("quit",Command.SCREEN,1);
        this.addCommand(command);
        Command c2=new Command("test",Command.SCREEN,1);
        this.addCommand(c2);
        Command c3=new Command("help",Command.SCREEN,1);
        this.addCommand(c3);
    }
    public void start()
    {
        Thread thread=new Thread(this);
        thread.start();
    }
    public void paint(Graphics g) {
        g.setColor(200, 200, 200);
        g.fillRect(0, 0, this.getWidth(), this.getHeight());
        g.setColor(0, 255, 0);
        g.fillRect(10, 10, 50, 50);
        g.setColor(0,0,255);
        g.drawRect(10, 70, 50, 50);
        g.setColor(255,0,0);
        g.drawString(text, 50, 50, 0);
        g.drawString(key,50,70,0);
    }
    public void commandAction(Command c, Displayable d) {
        text=c.getLabel();
        repaint();
    }
    public void run() {
        while(true)
        {            
             int  k=this.getKeyStates();
             if((k&MyGameCanvas.DOWN_PRESSED)!=0)
                 key="DOWN";
             if((k&MyGameCanvas.UP_PRESSED)!=0)
                 key="UP";
             if((k&MyGameCanvas.LEFT_PRESSED)!=0)
                 key="LEFT";
             repaint();
            try {
                Thread.sleep(300);
            } catch (InterruptedException ex) {
                ex.printStackTrace();
            }
        }
    }
}