Capped framerate and "getting" FPS

[Shazer2]

I'm trying to learn how to cap my framerate to 60 using JUST Java. I have a simple understanding yet far from perfect or even knowing how to get it working. I just know I need to get the time --> do rendering updates etc --> get the time again. I then need to do something with the difference (lastTime - firstTime) but I'm not sure what.

Any help with game looping and getting/setting the FPS would be much appreciated.

~Shazer2

[theagentd]

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long frameNanoseconds = 1000*1000*1000 / DESIRED_FPS; long startTime = System.nanoTime(); while(gameIsRunning){     updateAndRenderEverything();     long timeTaken = System.nanoTime() - startTime;     if(timeTaken < frameNanoseconds){         int sleepMillis = (frameNanoseconds - timeTaken) / (1000*1000);         try{             Thread.sleep(sleepMillis);         catch(InterruptedException ex){             ex.printStackTrace();         }     }     startTime += frameNanoseconds; }

[ra4king]

For Thread.sleep(...) to work reliably on windows, use the following trick:

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new Thread() {     {         setDaemon(true);         start();     }         public void run() {         while(true) {             try{                 Thread.sleep(Long.MAX_VALUE);             }             catch(Exception exc) {}         }     } };