/**

* In this sample project, Painter is waiting for Mason.

* Until mason completes his task, the painter cannot start his job.

*

* @author L.Gobinath

*/

public class JoinDemo {

public static void main(String[] args) {

Thread mason = new Thread(new Mason());

Thread painter = new Thread(new Painter(mason));

mason.start();

painter.start();

}

}

class Mason implements Runnable {

@Override

public void run() {

System.out.println("Start building.");

for (int i = 0; i < 5; i++) {

System.out.println("Building a house...");

try {

Thread.sleep(1000);

} catch (InterruptedException ex) {}

}

System.out.println("Finish building.");

}

}

class Painter implements Runnable {

private Thread mason;

public Painter(Thread mason) {

this.mason = mason;

}

@Override

public void run() {

System.out.println("Wait for mason.");

// Join this thread after the mason thread.

try {

this.mason.join();

} catch (InterruptedException ex) {}

System.out.println("Start painting.");

for (int i = 0; i < 5; i++) {

System.out.println("Painting the house...");

try {

Thread.sleep(1000);

} catch (InterruptedException ex) {}

}

System.out.println("Finish painting.");

}

}