Why does my Panel not update with the new picture?

Question

Hi!
I call the folowing panel from my main Window where on certain events I want to get the panel to display a different image. The problem is that the initial image stays on.
import java.awt.*;
import java.awt.image.*;
public class Panel1 extends Panel {
     Image thebkg1;//image to display
Panel1(Image ig){
     thebkg1=ig;
}//end the constructor
public void paint(Graphics g)
     g.drawImage(thebkg1,0,0,this);
}//end paint
public void update(Graphics g){
     paint(g);
}//end update
public void dImg(Image po){
     thebkg1=po;
     repaint();
}//end dImg - gets called by the main Window in order to display a new image
}//end Panel1 class
Can somebody please let me know what is wrong with the code?
Thank you

Answer 1

public void dImg(Image po){
thebkg1=po;
validate()
repaint();
}