sequencing

import java.util.Random;
import java.util.concurrent.Semaphore;

class OrderedPrinting {
    Semaphore s1 = new Semaphore(1);

    public void printFirst()  throws InterruptedException {
        synchronized (this) {
            while (s1.availablePermits() != 1) {
                wait();
            }
            System.out.println("First");
            s1.release();
            notifyAll();
        }
    }

    public void printSecond() throws InterruptedException {
        synchronized (this) {
            while (s1.availablePermits() != 2) {
                wait();
            }
            System.out.println("Second");
            s1.release();
            notifyAll();
        }

    }

    public void printThird() throws InterruptedException {
        synchronized (this) {
            while (s1.availablePermits() != 3) {
                wait();
            }
            System.out.println("Third");
            s1.release();
            s1 = new Semaphore(1);
            notifyAll();
        }

    }
}


class Demonstration {
    public static void main(String args[]) throws InterruptedException {
        OrderedPrinting orderedPrinting = new OrderedPrinting();
        Thread t1 = new Thread(new Runnable() {
            @Override
            public void run() {

                try{
                    orderedPrinting.printFirst();
                }catch (Exception ex){
                    System.out.println(ex.getMessage());
                }
            }
        });


        Thread t2 = new Thread(new Runnable() {
            @Override
            public void run() {
                try{
                    orderedPrinting.printSecond();
                }catch (Exception ex){
                    System.out.println(ex.getMessage());
                }
            }
        });



        Thread t3 = new Thread(new Runnable() {
            @Override
            public void run() {
                try{
                    orderedPrinting.printThird();
                }catch (Exception ex){
                    System.out.println(ex.getMessage());
                }
            }
        });



        Thread t1_1 = new Thread(new Runnable() {
            @Override
            public void run() {

                try{
                    orderedPrinting.printFirst();
                }catch (Exception ex){
                    System.out.println(ex.getMessage());
                }
            }
        });


        Thread t2_2 = new Thread(new Runnable() {
            @Override
            public void run() {
                try{
                    orderedPrinting.printSecond();
                }catch (Exception ex){
                    System.out.println(ex.getMessage());
                }
            }
        });



        Thread t3_3 = new Thread(new Runnable() {
            @Override
            public void run() {
                try{
                    orderedPrinting.printThird();
                }catch (Exception ex){
                    System.out.println(ex.getMessage());
                }
            }
        });


        t3.start();
        Thread.sleep(1000);
        t1.start();
        Thread.sleep(1000);
        t2.start();

        t3_3.start();
        Thread.sleep(1000);
        t1_1.start();
        Thread.sleep(1000);
        t2_2.start();

        t3.join();
        t1.join();
        t2.join();
        t3_3.join();
        t1_1.join();
        t2_2.join();

    }
}