import java.awt.*;
import java.applet.*;

public class SafariBug extends Applet implements Runnable
{
    Thread thread;
    int repaints;
    int paints;
    int updates;
    int idles;
    volatile boolean updating;
    Font font = new Font("Fixed", Font.BOLD, 36);

    public void start()
    {
        thread = new Thread(this);
        thread.start();
    }
    public void stop()
    {
        thread = null;
    }
    public void run()
    {
        try {

            Thread thisThread = Thread.currentThread();
            while (thisThread == thread)
            {
                setUpdating(true);
                ++repaints;
                repaint();
                do {
                    ++idles;
                    thisThread.sleep(500); 
                } while (getUpdating() && (thread != null));
            }

        } catch (InterruptedException ex) {  }
    }

    private synchronized boolean getUpdating() { return updating; }
    private synchronized void setUpdating(boolean b) { updating = b; }

    public void paint(Graphics g)
    {
        ++paints;
        update(g);
    }
    public void update(Graphics g)
    {
        ++updates;
        g.setColor(Color.blue);
        g.fillRect(0,0,size().width,size().height);
        g.setColor(Color.red);
        g.setFont(font);
        g.drawString("Paint:   "+paints, 0, 30);
        g.drawString("Repaint: "+repaints, 0, 110);
        g.drawString("Update:  "+updates, 0, 190);
        g.drawString("Idle:    "+(idles-repaints), 0, 270);
        setUpdating(false);
    }
    public boolean mouseDown(Event ev,int x,int y)
    {
        getAppletContext().showStatus("p="+paints+" r="+repaints+" u="+updates+" i="+(idles-repaints));
        return true;
    }
}