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package rarinugraha;
 
import java.util.concurrent.Semaphore;
 
/**
 *
 * @author Rarinugraha
 */
public class MutexEx {
 
   
static Semaphore semaphore = new Semaphore(1);
 
   
static class EToll extends Thread {
 
        String keran = “”;
 
        EToll(String gto) {
            this.keran = gto;
        }
 
        public void run() {
 
            try {
 
                System.out.println(keran +
” : Nyari GTO (-_-)”);
                System.out.println(keran +
” : GTO yang tersedia : ”
                        + semaphore.availablePermits());
 
                semaphore.acquire();
                System.out.println(keran +
” : Masuk GTO (* ^ ? ^)”);
 
                try {
 
                    System.out.println(keran
+ ” : Lagi tapping,”
                            + ” GTO yang
tersedia : ”
                            +
semaphore.availablePermits());
 
                    Thread.sleep(1000);
 
                } finally {
 
                    System.out.println(keran
+ ” : Selesai tapping…”);
                    semaphore.release();
                    System.out.println(keran
+ ” : GTO yang tersedia : ”
                            +
semaphore.availablePermits());
 
                }
 
            } catch (InterruptedException e)
{
 
                e.printStackTrace();
 
            }
 
        }
 
   
}
 
   
public static void main(String args) {
 
        System.out.println(“Total GTO
tersedia : ”
                +
semaphore.availablePermits());
 
        EToll et1 = new
EToll(“Alpha”);
        et1.start();
 
        EToll et2 = new
EToll(“Beta”);
        et2.start();
 
        EToll et3 = new
EToll(“Gamma”);
        et3.start();
 
        EToll et4 = new
EToll(“Delta”);
        et4.start();
 
   
}
}

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