JAVA Frame 窗体背景图片，首位相接滚动

//背景图片连续滚动，程序已经跑过。前提！背景图片宽度比窗体长些（1毫米也行，求求了）.

//小白，初学中ing

import java.awt.Graphics;

import java.awt.Image;

import javax.swing.ImageIcon;

import mine.game.util.PropertiesUtil;

@SuppressWarnings("serial")

public class GameFrame extends MyFrame{
private Image img=ImageUtil.imageLoad("image/bk.jpg");
double movs,speed=1,headmovs;
double pWidth,pHeight,bgWidth;

@Override

public void paint(Graphics g) {
//g.drawImage(img, 0, 0, null);
//===================================================
pWidth=PropertiesUtil.getValue("Width", "game.properties");
pHeight=PropertiesUtil.getValue("Height", "game.properties");
bgWidth=new ImageIcon(img).getIconWidth();

//movs+=speed;
if(bgWidth>pWidth+movs){
g.drawImage(img, 0, 0, (int)pWidth,(int)pHeight, (int)movs, 0, (int)(pWidth+movs), (int)pHeight, null);
}
if(bgWidth<=pWidth+movs){
headmovs=pWidth+movs-bgWidth;
g.drawImage(img, 0, 0, (int)(pWidth-headmovs),(int)pHeight, (int)movs, 0, (int)(bgWidth), (int)pHeight, null);
g.drawImage(img,(int)(pWidth-headmovs), 0, (int)pWidth,(int)pHeight, 0, 0, (int)(headmovs), (int)pHeight, null);
if(headmovs>=pWidth){
//重新初始化所有变量数据，循环
movs=headmovs-pWidth;
}
}
movs+=speed;
//===================================================

}

public static void main(String[] args) {
GameFrame gf=new GameFrame();
gf.launchFrame();

}

}

//=================================

import java.awt.Frame;

import java.awt.Graphics;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.awt.image.BufferedImage;

import mine.game.util.PropertiesUtil;

@SuppressWarnings("serial")

public class MyFrame extends Frame{
private BufferedImage imgBuffer;
private Graphics gBuffer;
public void launchFrame(){
int wd=800;//PropertiesUtil.getValue("Width", "game.properties");
int ht=600;//PropertiesUtil.getValue("Height", "game.properties");
setSize(wd,ht);
   setLocation(0, 0);
   setVisible(true);
   
   new PaintThread().start();
   
    addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}    
});
}

//重画窗口线程，内部类

class PaintThread extends Thread{
public void run(){
while(true){
repaint();
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}

}

/**

 * 双缓冲解决，屏闪.此方法在，继承Frame的AWT编程中才有效。JFram不凑效,其有自己先进的实现方式（自己猜的，有时间学学）

 */

@Override

public void update(Graphics g) {
if(imgBuffer==null){
imgBuffer=(BufferedImage)createImage(this.getWidth(),this.getSize().height);//创建图形缓冲
//imgBuffer=new BufferedImage((int)this.getSize().getWidth(),(int)this.getSize().getHeight(),BufferedImage.TYPE_4BYTE_ABGR);//创建图形缓冲
}
gBuffer=imgBuffer.getGraphics();//获取图形缓冲区的图形上下文

    gBuffer.fillRect(0, 0, this.getWidth(), this.getHeight());
this.paint(gBuffer);//用paint方法中编写的绘图过程对图形缓冲区绘图
gBuffer.dispose();//释放图形上下文资源
g.drawImage(imgBuffer, 0, 0, null);//将图形缓冲区绘制到屏幕上

}

}

//====================

import java.awt.Image;

import java.awt.Toolkit;

import java.net.URL;

public class ImageUtil {
public static Image imageLoad(String path){

URL u=ImageUtil.class.getClassLoader().getResource(path);
return Toolkit.getDefaultToolkit().getImage(u);
}

}