BackBuffer & Graphics Object Issue...

[J_Newb]

I was looking at a source-code in order to learn how to use BackBuffers...and... I've found that :

///applet body

      Image backbuffer;
      Graphics backg;

/// init() 

      backbuffer = createImage( width, height );
      backg = backbuffer.getGraphics();

How's "backg" influenced by the assignment?

[Norm]

How's "backg" influenced by the assignment?

It's value is changed from no value to a graphics context object for the Image object