Awt TankWar0.4

package com.diaodiao;

import java.awt.Frame;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TankClient extends Frame {

int x = 50;
int y = 50;

Image offScreenImage = null;

@Override
public void paint(Graphics g) {
Color c = g.getColor();
g.setColor(Color.RED);
g.fillOval(x, y, 30, 30);
g.setColor(c);

y += 5;
}

public void update(Graphics g) {
if(offScreenImage == null) {
offScreenImage = this.createImage(800, 600);
}
Graphics gOffScreen = offScreenImage.getGraphics(); //图片的画笔
Color c = gOffScreen.getColor();
gOffScreen.setColor(Color.GREEN);
gOffScreen.fillRect(0, 0, 800, 600);
gOffScreen.setColor(c);
paint(gOffScreen);
g.drawImage(offScreenImage, 0, 0, null);
}

/**
*
*/
private static final long serialVersionUID = 1L;

public void lauchFrame() {
setLocation(300, 100);
setSize(800, 600);
setTitle("TankWar");
setResizable(false);
setBackground(Color.GREEN);
this.addWindowListener(new WindowAdapter(){

@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}

});
setVisible(true);
new Thread(new PaintThread()).start();
}

/**
* @param args
*/
public static void main(String[] args) {
TankClient tc = new TankClient();
tc.lauchFrame();
}

private class PaintThread implements Runnable {

@Override
public void run() {
while(true) {
repaint();
try {
Thread.sleep(50);
} catch (InterruptedException e) {
e.printStackTrace();
}
}

}

}

}