import java.awt.Graphics2D;
import java.awt.Color;
import java.awt.event.KeyEvent;
import java.awt.Event;
import java.awt.image.BufferStrategy;
import javax.swing.JFrame;

public class Q extends JFrame
{
    boolean[] k = new boolean[256];

    public static void main(String args[])
    {
        new Q();
    }

    public Q()
    {
      long lastFrame=0;
      float yield=10000f;
      float frameAverage=16f; //start with desired msec per frame

      //super("title"); // title

        setSize(640,480);
        setResizable(false);
        show(); // depricated but less bytes than setVisible(true);
        createBufferStrategy(2);
        BufferStrategy b = getBufferStrategy();
        Graphics2D g;

        do
        {
         g=(Graphics2D)b.getDrawGraphics();
         g.setColor(new Color(0x000000));
         g.fillRect(0,0,640,480);
            // do game here

            b.show();
            try
            {
            long timeNow = System.currentTimeMillis();
            //rolling average for the last 10 time inputs
            frameAverage = (frameAverage * 10 + (timeNow - lastFrame)) / 11;
            lastFrame=timeNow;
            //16f = for 16msec
            //0.1f = damping value
            //and that +0.05f bit is for ensuring that it can grow faster after it ran flat out for a while
            yield+=yield*((16f/frameAverage)-1)*0.1f+0.05f;

            for(int i=0;i<yield;i++)
               Thread.yield();
            }catch(Exception e){}
            g.dispose();
        } while(!k[27] && isVisible());
        System.exit(0);
    }

    public void processKeyEvent(KeyEvent e)
    {
        // & with 0xFF to avoid any overflow of k[]
        k[e.getKeyCode()&0xFF] = e.getID() == 401;
    }
}