Understanding Java Swing screen buffer memory usage (reading materials would be welcome)

So I need to understand how swing allocates memory for buffering screen rendering. Obviously there are duplicates if you have double/tripple/etc buffering. However I would need to know when swing allocates memory and how much of it. Very helpful to know if I have multiple windows open (launched from the same jvm) how much memory is needed depending on windows being maximized to one screen, multiple screens (I need it to go up to 6 screens), etc.

Does anyone know of any good readings or maybe have answers for how Java Swing/AWT allocate memory for rendering buffers.

End of the day, I am looking for a definitive formula so that if I have a number of windows opened, number of buffers in each window, location of windows, and size of each window I can get an exact byte count required to render the application (just the buffering part, the rest of the memory is another problem)

I was assuming it was开发者_如何学Go (single buffered) x by y of each window = 1 buffer, add those together and you have all memory requirements, but profiling the data this appears to be far from the truth, some buffers are weak/soft references, some strong, and I cannot determine the way to calculate (yet :)).

Edit: I am using JFrame objects (for better or worse) to do my top-level stuff.

Double buffering is a convenient feature of JPanel, but there will always be a significant platform-dependent contribution: Every visible JComponent belongs to a heavyweight peer whose memory is otherwise inaccessible to the JVM.

If you're trying to avoid running out of memory, pick a reasonable value for the startup parameters and instruct the user how to change them. ImageJ is a good example.

I'd recommend JConsole and the Swing Source code fro this kind of precision.

I assume you realize this will be extremely tedious to calculate since you have to consider every object created somewhere in the process, which of course will depend on the controls involved in the UI.

I am not aware of any automatic screen buffering support in Swing. If you need double buffering, you need to implement it yourself in which case you will know better how to calculate memory requirements :-)

See this answer: Java: how to do double-buffering in Swing? for more information and good pointers.