public class Queue{
    private boolean Vset=false;
    private int n;
    public synchronized void get() throws Exception{
        while(!Vset){
            wait();
        }
        System.out.println("Got:"+n);
        Vset=false;
        notify();
    }

    public synchronized void put(int n)throws Exception{
        while (Vset) {
            wait();
        }
        this.n=n;
        System.out.println("Put:"+n);
        Vset=true;
        notify();
    }
}


public class ThreadService {
    public static Runnable getProducer(Queue q){
        return new Runnable() {
            private Queue queue=q;
            int i=1;
            public void run(){
                while (true) {
                    try{
                        queue .put(i++);
                    }catch(Exception e){
                        e.printStackTrace();
                    }
                    
                }
            }
        };
    }
        public static Runnable getConsumer(Queue q){
            return new Runnable() {
                private Queue queue=q;
                public void run(){
                while (true) {
                    try{
                        queue.get();
                    }catch(Exception e){
                        e.printStackTrace();
                    }
                }
            }
            };
        }
    
}


public class ProducerConsumerDemo {
    public static void main(String[] args) {
        Queue q=new Queue();
        new Thread(ThreadService.getProducer(q)).start();
        new Thread(ThreadService.getConsumer(q)).start();
    }
}