Thread prod consume

class Queue{
    int item=0;
    boolean busy=false;
    synchronized int get(){
        if(!busy){
            try{
                wait();
            } catch(InterruptedException e){
                e.printStackTrace();
            }
        }
        System.out.println("GET: "+item);
        busy=false;
        notify();
        return item;
    }
    synchronized void put(int item){
        if(busy){
            try{
                wait();
            } catch(InterruptedException e){
                e.printStackTrace();
            }
        }
        System.out.println("PUT: "+item);
        this.item=item;
        busy=true;
        notify();
    }
}

class Producer extends Thread{
    int i=0;
    Queue q;
    Producer(Queue q){
        this.q=q;
        setName("Producer");
        start();
    }
    public void run(){
        try{
            while(i<=10) q.put(i++);
            Thread.sleep(500);
        } catch(InterruptedException e){
            e.printStackTrace();
        }
    }
}

class Consumer extends Thread{
    Queue q;
    Consumer(Queue q){
        this.q=q;
        setName("Consumer");
        start();
    }
    public void run(){
        int i=0;
        while(true){
            try{
                q.get();
                Thread.sleep(500);
            } catch(InterruptedException e){
                e.printStackTrace();
            }
        }
    }
}

class Main{
    public static void main(String args[]){
        Queue q=new Queue();
        new Producer(q);
        new Consumer(q);
    }
}