/**
 * how to synchronize ending of threads
 * @author mh
 *
 */

class MyRun implements Runnable { 	// pattern of behaviour

    private String name;
    final int MAX = 10;

    public MyRun (String name) {
		this.name = name;
    } // constructor

    public void run() {			// the actual code to be executed
	    for (int i = 0; i<MAX; i++) {
	        System.out.println(name + ": " + i);
	        Simulate.waitForSomething();
        } // for
    } // run

} // class Process


public class ThreadDemo3 {   

    public static void main (String[] argv) {

	Thread a = new Thread (new MyRun("A"));	// create process instances
	Thread b = new Thread (new MyRun("B"));

	System.out.println(" -- begin of ThreadDemo3 -- ");

        a.start();		// start of the execution -> process
        b.start();

	try {
            b.join();			// Wait for this thread to end
            a.join(); 
        } catch (Exception e) {} 

        System.out.println(" -- end of ThreadDemo3 -- ");

    } //main

} // class ThreadDemo3


class Simulate {

    public static void waitForSomething() {
        if (Math.random()<0.5) {
            try { Thread.sleep(200);} 
            catch(InterruptedException e) {};
            //used instead of Thread.yield() to ensure portability
        } // if
    } // waitForSomething

} // class Simulate