/**
 * ThreadDemo2
 * 
 * a second demo for Threads;
 * this one modifies the old Spring 2000 CIS 235 ThreadDemo1.java,
 * making it avoid deprecated Thread methods.
 * It uses an AWT Applet and the Runnable interface.
 *
 * RECOMMENDED SIZE: height 100, width 200 is fine.
 *
 * modified by: Sharon M. Tuttle
 * last modified: 3-12-01
 **/

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

public class ThreadDemo2 extends Applet implements Runnable
{
        // threads to be started up within this applet
        Thread  myThread1, myThread2, myThread3;

        public void init()
        {
                setBackground(Color.lightGray);
                Label describe = new Label("ThreadDemo2: Version 1.0");
                add(describe);
        }

        // creates and starts up my threads --- is executed every time the
        // user comes into the applet context after moving away?
        public void start()
        {
                // for each of the 3 threads not yet started,
                // start them up
                if (myThread1 == null)
                {
                        // ...start it up for this applet,
                        // naming this thread "My Thread #1"
                        myThread1 = new Thread(this, "My Thread #1");
                        myThread1.start();
                }

                if (myThread2 == null)
                {
                        myThread2 = new Thread(this, "My Thread #2");
                        myThread2.start();
                }

                if (myThread3 == null)
                {
                        myThread3 = new Thread(this, "My Thread #3");
                        myThread3.start();
                }
        }

        // run() is called by the system after thread has been started
        // by the system
        public void run()
        {
                Thread  executingThread;

                // this will help me to determine the currently-
                // executing thread, for display purposes;
                executingThread = Thread.currentThread();

                for (int i=0; i<10; i++)
                {
			System.out.println("This thread is: " +
				executingThread.getName());
                        try
                        {
                                // one second pause
                                Thread.sleep(1000);
                        }
                        catch(InterruptedException e)
                        {
                                // no action, but catch is required
                        }
                }
        }
}