title: how to make java JPanel and graphics2d transparent?
body: <p>Well the title is quite self explanatory. I want to build two panels one on-top of each other in layers using java. I want the top layer to contain a JPanel which will contain a graphics2d object. I'd like both the JPanel and graphics2d to have transparent background (I still want the content drawn by the graphics2d visible). Does anyone have an idea how it can be done?</p>