Ideas: want to let the ball first need to let him move up in the window of the constant change of position can be achieved, is positioned directly in the code to start small ball to create a variable X and Y to make him stop redrawing action
// // load the window level fly ball // Import Package
import java.awt.*;
import javax.swing.*;
The code editor window
public class BallGame extends JFrame{
int
i=1;
Image
ball = Toolkit.getDefaultToolkit () getImage ( "images / ball.png");. // load the code image
Image
desk = Toolkit.getDefaultToolkit().getImage(“images/desk.jpg”);
//给小球定位在窗口的位置
double
x = 100; // coordinate pellets
double
y = 100;
// direction of movement of the ball
boolean
right = true;
//让图片显示在窗口上的方法//画窗口的方法
public
void paint(Graphics g){
g.drawImage(desk,
0, 0, null);
g.drawImage(ball,
(You) work, (you) y, null);
if
(right) {
x=
x+10;
}else{
x=x-10;
// small ball at the edge of this process would exceed the table so be subtracted from the corresponding else seems unreal
}if
(X> 856-40-30) {// 856 is the width of the window, the width of the table 40, the ball 30 is a small diameter
right=false;
}if(x<40){
// hit side will rebound
right
= true;
}}
void
launchFrame(){
setSize(856,500);//窗口大小；
setLocation(800,800);//出现位置定位
setVisible(true);
//重画窗口
Redraw is equivalent to refresh the window in order to see the ball moving up effect
while(true){
repaint();
try{Thread.sleep(40);//毫秒Thread.sleep(40);//毫秒
}catch(Exception
e) {e.printStackTrace ();}}}
//main方法是程序执行的入口
public static void main(String[] args){
System.out.println("666");
BallGame game=new BallGame();
game.launchFrame();
}}
In this way the ball will move up the cycle
