这段代码为什么会报错

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这段代码为什么会报错10

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.Sprite;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

public class GameMain extends MIDlet {
private Display display;
private myGame game;

public GameMain() {
display = Display.getDisplay(this);
game = new myGame();
}

protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
// TODO Auto-generated method stub

}

protected void pauseApp() {
// TODO Auto-generated method stub

}

protected void startApp() throws MIDletStateChangeException {
display.setCurrent(game);

}

}

class myGame extends Canvas implements Runnable
{
private Image img1,img2;
private Sprite sp1,sp2;
private Graphics gra;
private int x1 = 0, y1 = 0;
private int x2 = 150, y2 = 150;
private boolean RUN = true , DIR = true;

public myGame(){
super(true);
try{
img1 = Image.createImage("/img1.png");
img2 = Image.createImage("/img2.png");
sp1 = new Sprite(img1);
sp2 = new Sprite(img2);

}catch(Exception ex){
ex.printStackTrace();
}
sp1.setPosition(x1, y1);
sp2.setPosition(x2, y2);
new Thread(this).start();
}
public void run(){
while(RUN){
if(DIR){
sp1.move(1, 1);
sp2.move(-1, -1);
}
else{
sp2.move(1, 1);
sp1.move(-1, -1);
}
gra.setColor(255,255,255);
gra.fillRect(0,0,this.getWidth(),this.getHeight());
sp1.paint(gra);
sp2.paint(gra);
this.flushGraphics();
if(sp1.collidesWith(sp2, true)){
//RUN = false;
DIR = false;
}
try{
Thread.sleep(10);
}catch(Exception ex){}
}
}
protected void paint(Graphics arg0) {
gra = arg0.getGraphics(this);
}

}

J2ME

2011年5月10日 16:20

caiv5
20
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2个答案按时间排序按投票排序

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import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.Sprite;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

public class GameMain extends MIDlet {
	private Display display;
	private myGame game;

	public GameMain() {
		display = Display.getDisplay(this);
		game = new myGame();
	}

	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
		// TODO Auto-generated method stub

	}

	protected void pauseApp() {
		// TODO Auto-generated method stub

	}

	protected void startApp() throws MIDletStateChangeException {
		display.setCurrent(game);

	}

}

class myGame extends Canvas implements Runnable {
	private Image img1, img2;
	private Sprite sp1, sp2;
	private int x1 = 0, y1 = 0;
	private int x2 = 150, y2 = 150;
	private boolean RUN = true, DIR = true;

	public myGame() {
		super();
		try {
			img1 = Image.createImage("/img1.png");
			img2 = Image.createImage("/img2.png");
			sp1 = new Sprite(img1);
			sp2 = new Sprite(img2);

		} catch (Exception ex) {
			ex.printStackTrace();
		}
		sp1.setPosition(x1, y1);
		sp2.setPosition(x2, y2);
		new Thread(this).start();
	}

	public void run() {
		while (RUN) {
			if (DIR) {
				sp1.move(1, 1);
				sp2.move(-1, -1);
			} else {
				sp2.move(1, 1);
				sp1.move(-1, -1);
			}
			repaint();
			// sp1.flushGraphics();
			if (sp1.collidesWith(sp2, true)) {
				// RUN = false;
				DIR = false;
			}
			try {
				Thread.sleep(100);
			} catch (Exception ex) {
			}
		}
	}

	protected void paint(Graphics gra) {
		gra.setColor(255, 255, 255);
		gra.fillRect(0, 0, this.getWidth(), this.getHeight());
		sp1.paint(gra);
		sp2.paint(gra);
	}

}

2011年5月11日 16:02