Some problems with fullscreen, keylistener and bufferstrategy :-)

Question

Hi.
I have a few questions.
I worked a long time trying to make my game run smoothly but I just couldn't get it perfect. I thought it had something to do with the load of graphics I use, but it wasn't the case. Here is what I did:
public class Game extends Frame implements Runnable, KeyListener {
    int [] controls = new int[256];
    final static int FrameRate = 60;
    final int MiliFrameLength = 1000/FrameRate;
    private long startTime;
    private int frameCount;
    public Game()
        GraphicsDev gd = new GraphicsDev(); // Class that handles the graphics device
        int ref = gd.getDisplayM().getRefreshRate();
        if(fullscreen==1) {
            setUndecorated(true);
            gd.getGraphicsDev().setFullScreenWindow(this);
            gd.getGraphicsDev().setDisplayMode(new DisplayMode(screenWidthX,screenWidthY,24,ref));
        } else if (fullscreen==0) {
            setSize(screenWidthX,screenWidthY);
        addKeyListener(this);
        show();
        createBufferStrategy(2);
        buffer = getBufferStrategy();
        startTime = System.currentTimeMillis();
        frameCount = 0;
        Thread t = new Thread(this);
        t.start();
        update();
    public void update() {
        while(rungame)  {
            Graphics2D gr2D = (Graphics2D)buffer.getDrawGraphics();
            if(controls[40] == 1) moveup(1);
            if(controls[38] == 1) movedown(1);
            if(controls[37] == 1) moveleft(1);
            if(controls[39] == 1) moveright(1);
            paintGraphics(gr2D);
            gr2D.dispose();
            buffer.show();
            frameCount++;
            while((System.currentTimeMillis()-startTime)/MiliFrameLength <frameCount)
            { Thread.yield(); }
    public void keyPressed(KeyEvent ke) {
         controls[ke.getKeyCode()&0xFF] = 1;
    public void keyReleased(KeyEvent ke) {
         controls[ke.getKeyCode()&0xFF] = 0;
      public void keyTyped(KeyEvent ke){}
}The original code is of cause much bigger, so this is just to show what happens. It's pretty straight forward.
My problem is that the game only runs completely smooth when it is in fullscreen and v-synched. This means that I have to have a framerate at 60 (same as the refreshrate). It looks great, but my keyboard input can't keep up with this speed. About every 10 sec the game hangs for a while. If I set the framerate or refreshrate lower it doesn�t run smoothly.
My questions are:
1: Is it possible to make the keyboard work with a framerate/refreshrate of 60+
2: Is it possible to use v-synched in window mode?
3: If yes � How do I do this? ;-)
Maybe I'm taking a totally wrong approach to this, but everyone seems to have different solution to making a game to run smooth, and right now I'm very confused (was first yesterday I found out about the v-synch).

Answer 1

I've seen this code before. You're following a standard rendering template right? I've never used the
while((System.currentTimeMillis()-startTime)/MiliFrameLength <frameCount)
            { Thread.yield(); } method for syncing framerate but here's another suggestion which
is what I use and my rendering is as smooth as silk even at a monitor refresh rate (and framerate)
of 85 fps (however, like you, I only go to 60 fps) long framerate = 60;  //i.e. 60 fps
   public final void run(){
      long start_Time = 0;
      long elapsed_Time = 0;
      final Thread t = Thread.currentThread();
      while(t == thread){
         //start_Time = . . .
         render();
         relocate_Sprites();
         sort_Sprites_for_Z_Buffer();
         //elapsed_Time = . . .
         try{
            if(elapsed_Time < 1000/framerate)
               Thread.sleep(1000/framerate-elapsed_Time);
            else
               Thread.sleep(3); // without this line, you may starve the gc
         catch(InterruptedException e){
   }This system works perfectly even with 40 Sprites, one of which is like 1050 x 640 in dimensions
(background which scrolls a bit). My system is not particularly fast:
-AMD Athlon 1.2 GHz
-384 MB RAM
-nVidia GeForce 2 400 MX at 32 MB (this piece is practically extinct now)