Java applet scale

I have a java game that I have made, is it a Canvas in a JFrame to run as an application and an applet.

When running as an applet, I want it so that when the user resizes the window, the game scales to fit the new size window.

Is there anyway of resizing the canvas and all the images or shapes that I have drawn on it to fit the new size window, or do I have to go though and change the code on all my objects and the positions they draw?

Any help would be very useful :)

You would have to add scaling to your painting. A transformation applied to your graphics might be the easiest way. You would determine the current size of the Canvas and scale based on the standard size.