Implementation of Producer Consumer Problem in Java using threads

ProducerConsumerTest.java

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

//Producer Consumer using Threads

public class ProducerConsumerTest
{
    public static void main(String args[])
    {

        CubbyHole c = new CubbyHole();
        Producer p1 = new Producer(c, 1);
        Producer p2 = new Producer(c, 2);
        Consumer c1 = new Consumer(c, 1);
        Consumer c2 = new Consumer(c, 2);
        p1.start();
        p2.start();
        c1.start();
        c2.start();
    }
}

class CubbyHole {
    private int contents;
    private boolean available = false;

    public synchronized int get(int who) {
        while (available == false) { //sleep on not available
            try {
                wait();
            } catch (InterruptedException e) { }
        }
        available = false;
        System.out.println("Consumer " + who + " got: " + contents);
        notifyAll();
        return contents;
    }
   
    public synchronized void put(int who, int value) {
        while (available == true) {
            try {
                wait();
            } catch (InterruptedException e) { }
        }
        contents = value;
        available = true;
        System.out.println("Producer " + who + " put: " + contents);
        notifyAll();
    }
}

class Producer extends Thread
{
    private CubbyHole cubbyhole;
    private final int number; //Thread Number
    
    public Producer(CubbyHole c, int number) {
        cubbyhole = c;
        this.number = number;
    }
    
    @Override
    public void run() {
        for (int i = 0; i < 10; i++) {
            cubbyhole.put(number, i);
            try {
                Thread.sleep((int)(Math.random() * 100));
            } catch (InterruptedException e) { }
        }
    }
}

class Consumer extends Thread {
    private CubbyHole cubbyhole;
    private final int number;

    public Consumer(CubbyHole c, int number) {
        cubbyhole = c;
        this.number = number;
    }

    @Override
    public void run() {
        int value = 0;
        for (int i = 0; i < 10; i++) {
            value = cubbyhole.get(number);
        }
    }
}