JAVA

java calculate fps

long frames, fps, fpsTimer;
public final void calculateFps() {
	frames++;
	if(System.currentTimeMillis() - fpsTimer < 1000L) return;
	fpsTimer = System.currentTimeMillis();
	fps      = frames;
	frames   = 0L;
}

java calculate fps

double fps = 1000000.0 / (lastTime - (lastTime = System.nanoTime())); //This way, lastTime is assigned and used at the same time.