back_buffer ?

[ed jones]

Hello,

I would like to put a series of blocks across the screen for a game. The idea is to do the painting to the backbuffer, then put everything to the screen. I see the blocks flash across the screen before they are gone. So I'm messing up someplace with the paint process? here's the paint part (some parts from a tutorial)

  
Dimension dim;
 

private Image offScreenImage;
private Graphics bufferGraphics;
 
public void init()
{

dim = getSize();

setBackground (Color.black);



offScreenImage = createImage(dim.width,dim.height);

bufferGraphics = offScreenImage.getGraphics();
}
 

 
public void update (Graphics g)
{
paint(g);
 
}
 
public void paint (Graphics g)
{

bufferGraphics.clearRect(0,0,dim.width,dim.height);
bufferGraphics.setColor(Color.yellow);
bufferGraphics.fillOval(x_posBall,y_posBall,radius * 2,radius * 2);

for(int i =0; i<10; i++)
{
bufferGraphics.setColor(Color.red);
bufferGraphics.fillRect(startX, 20, 10, 10);
startX += 20;
}

//blast to screen
g.drawImage(offScreenImage,0,0,this); 
}
 
 

thanks for your time