import java.util.LinkedList;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author Jakub
 */
public class MyThread  {
public static  void main(String[] args)throws InterruptedException {
final PC pc = new PC();
        Thread t1 = new Thread(new Runnable() {
            @Override
            public void run()
            {
                try {
                    pc.produce();
                } catch (InterruptedException ex) {
                    System.out.println(ex);
                }
            }
        });
        Thread t2 = new Thread(new Runnable() {
            @Override
            public void run()
            {
                try {
                    pc.consume();
                } catch (InterruptedException ex) {
                    System.out.println(ex);
                }
            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();
}

public static class PC {
        LinkedList<Integer> list = new LinkedList<>();
        int capacity = 2;
        public void produce() throws InterruptedException
        {
            int value = 0;
            while (true) {
                synchronized (this)
                {
                    while (list.size() == capacity)
                        wait();
                    list.add(value++);
                    notify();
                }
            }
        }
        public void consume() throws InterruptedException
        {
            while (true) {
                synchronized (this)
                {
                    while (list.size() == 0)
                        wait();
                    list.removeFirst();
                    notify();
                }
            }
        }
    }
}