ball.java

新功能坦克大战

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.EventListener;
public class Ball extends JFrame implements  Runnable{
    TankFrame tankFrame;
    int x,y;
    boolean up,down,left,right;
    int Type;
    boolean life;
    public Image image;
    int sleeptime;    
    Ball(int a,int b,TankFrame tankFrame){
        this.tankFrame=tankFrame;
        this.x=a;
        this.y=b;
        Type=0;
        sleeptime=70;
        image = Toolkit.getDefaultToolkit().getImage("images/56.jpg");
    }
    public void paint(Graphics g){
        if(y==40||x==510){     }
        else{ g.drawImage(image, x, y, 10,10,null); }
    }
    public void run(){
        while(life){
            if(x<0||x>500||y<50|| y>590){
                life=false;
            }
            else{
                if(up){ y-=10; }
                else if(down){ y+=10; }
                else if(left){ x-=10; }
                else if(right){ x+=10; }
            }
            tankFrame.repaint();
            try {
                Thread.sleep(sleeptime);
            } catch (InterruptedException ie) { }
        }
    }
}