import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

import java.util.Iterator;

/** Monitors the count of the InputStreams available in this AppletContext */
public class StreamMonitor extends JApplet {

	Timer timer;

	public void init() {
		final JTextField num = new JTextField(20);
		num.setEditable(false);
		add(num);

		ActionListener listener = new ActionListener() {
				public void actionPerformed(ActionEvent ae) {
					Iterator it = getAppletContext().getStreamKeys();
					int count = 0;
					while(it.hasNext()) {
						it.next();
						count++;
					}
					num.setText( "" + count );
				}
			};
		timer = new Timer(200, listener);
		timer.start();
		System.out.println("Monitoring streams..");
	}

	public void destroy() {
		timer.stop();
	}
}