80.游戏项目-物体的移动

package test;
import java.awt.Color;
import java.awt.Font;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
/**
 * 测试窗口沿着各种轨迹移动
 * @author Nicholas
 * 
 */
public class GameFrame2 extends Frame {
    Image img = GameUtil.getImage("picture/test3.jpg");

    public void launchFrame(){
        setSize(500,500);
        setLocation(300,150);
        setVisible(true);
        
        new PaintThread().start();
        
        addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
    
    private double x=100,y=100;
    private boolean left;
    private boolean up;
    
    public void paint(Graphics g) {
        g.drawImage(img, (int)x, (int)y, null);
    
        if(left){
            x-=3;
        }
        else {
            x+=3;
        }
        if(x>500-50){
            left=true;
        }
        if(x<0){
            left=false;
        }
        if(up){
            y-=5;
        }
        else {
            y+=5;
        }
        if(y>500-50){
            up=true;
        }
        if(y<20){
            up=false;
        }
    }
    
    class PaintThread extends Thread{
        public void run(){
            while(true){
                repaint();
                try {
                    Thread.sleep(10);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
    public static void main(String[] args) {
        GameFrame2 gf=new GameFrame2();
        gf.launchFrame();
    }    
}