JAVA Frame form background image with the first scroll code instance attached

Background image scrolling, the program has run. The premise! The width of the background image is longer than that of the window. The code is as follows:

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){
// Reinitialize all variable data, loop 
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);
} 
});
}
// Redraw window thread, inner class 
class PaintThread extends Thread{
public void run(){
while(true){
repaint();
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
/**
 *  Double buffering solution, screen flash . This method is inherited Frame the AWT It works in programming. JFram Don't work , It has its own advanced way of implementation (guess, have time to learn) 
 */
@Override
public void update(Graphics g) {
if(imgBuffer==null){
imgBuffer=(BufferedImage)createImage(this.getWidth(),this.getSize().height);// Creating a graphics buffer 
//imgBuffer=new BufferedImage((int)this.getSize().getWidth(),(int)this.getSize().getHeight(),BufferedImage.TYPE_4BYTE_ABGR);// Creating a graphics buffer 
}
gBuffer=imgBuffer.getGraphics();// Gets the graphics context of the graphics buffer 
 gBuffer.fillRect(0, 0, this.getWidth(), this.getHeight());
this.paint(gBuffer);// with paint Method to write the drawing process to draw the graph buffer 
gBuffer.dispose();// Free up graphics context resources 
g.drawImage(imgBuffer, 0, 0, null);// Draws the graphics buffer to the screen 
}
}
//====================
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);
}
}

I hope you found the above code helpful