lock an object by using Semaphores

AIM: the main aim this program is to use a Synchronized method to lock an object by using Semaphores 

import java.util.concurrent.Semaphore;

public class SemaphoreTest1 {

    Semaphore binary = new Semaphore(1);

 

    public static void main(String args[]) {

        final SemaphoreTest1 test = new SemaphoreTest1();

        new Thread(){

            @Override

            public void run(){

              test.mutualExclusion();

            }

        }.start();

     

        new Thread(){

            @Override

            public void run(){

              test.mutualExclusion();

            }

        }.start();

     

    }

 

    private void mutualExclusion() {

        try {

            binary.acquire();

            //mutual exclusive region

            System.out.println(Thread.currentThread().getName() + " inside mutual exclusive region");

            Thread.sleep(1000);

        } catch (InterruptedException ie) {

            ie.printStackTrace();

        } finally {

            binary.release();

            System.out.println(Thread.currentThread().getName() + " outside of mutual exclusive region");

        }

    }

 

}