import java.util.concurrent.Semaphore;
class latchestest1{
	public static void main(String[]args){
		Semaphore sem = new Semaphore(0);

		for(int j = 0; j<10; j++){
			new TA(sem, j).start();
		}

		System.out.println("Threads under starters orders");
		try{
			Thread.sleep(3000);
		}catch(InterruptedException e){}
		System.out.println("Starting threads now");
		sem.release(10);
	}
}

class TA extends Thread{

	Semaphore sem;
	int num;

	public TA (Semaphore s, int n){
		sem = s; num = n;
	}

	public void run(){
		//wait for signal to go

			try {
				sem.acquire();
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block

			}

		System.out.println("Thread" +num+ "going");
	}
}