Java 2D Drawing Optimal Performance

Question

I\'m in the process of writing a Java 2D game. I\'m using the built-in Java 2D drawing libraries, drawing on a Graphics2D I acquire from a BufferStrategy from a Canvas in a

Answer 1

Here are some tips off the top of my head. If you were more specific and what you were trying to do I may be able to help more. Sounds like a game, but I don't want to assume.

Only draw what you need to! Don't blindly call repaint() all of the time, try some of the siblings like repaint(Rect) or repaint(x,y,w,h).

Be very careful with alpha blending as it can be an expensive operation to blending images / primitives.

Try to prerender / cache as much as possible. If you find yourself drawing a circle the same way, over and over, consider drawing in into a BufferedImage and then just draw the BufferedImage. You're sacrificing memory for speed (typical of games / high perf graphics)

Consider using OpenGL, use JOGL of LWJGL. JOGL is more Java-like whereas LWJGL provides more gaming functionality on top of OpenGL access. OpenGL can draw orders of magnitude (with proper hardware and drivers) than Swing can.