import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
* @author Amareswar Reddy
* @version $Revision$, $Date$, $Author$
* @since Jul 1, 2008
*/
public class JoinTest
{
private static final Lock lock = new ReentrantLock();

public static void main(String[] args) throws InterruptedException
{
lock.lock();
try {
Thread t1 = new Thread(new Runnable(){
public void run()
{
lock.lock();
try{
System.out.println(“Sleeping for ten sconds and main thread should wait”);
try {
Thread.sleep(10000);
} catch (InterruptedException e) {

}
} finally {
lock.unlock();
}
}
});
t1.start();
t1.join();
System.out.println(“waited till outer thread is completed”);
} finally {
lock.unlock();
}

}
}