Untitled

class Semaphore {    private int count;    public Semaphore(int count) {        this.count = count;    }    synchronized public void waitSem() throws InterruptedException {        count--;        if (count<0) {            // then place this thread in waiting queue            wait();        }    }    synchronized public void signalSem() {        count++;        // remove a thread in waiting queue        // and place it in entry queue        notify();        //has no effect if there are no thread in waiting queue    }}//Semaphore