Old Producer/Consumer Example question

Question

how would I take this code, the old producer/consumer example, and make it for 2 consumers and 1 producer?
basically, like this:
Producer put 1
Consumer #1 got 1
Consumer #2 got 1
Producer put 2
Consumer #1 got 2
Consumer #2 got 2
etc.....
***********Producer.java***************
public class Producer extends Thread {
private CubbyHole cubbyhole;
private int number;
public Producer(CubbyHole c, int number) {
cubbyhole = c;
this.number = number;
public void run() {
for (int i = 0; i < 10; i++) {
cubbyhole.put(i);
System.out.println("Producer #" + this.number
+ " put: " + i);
try {
sleep((int)(Math.random() * 100));
} catch (InterruptedException e) { }
***********Consumer.java***********
public class Consumer extends Thread {
private CubbyHole cubbyhole;
private int number;
public Consumer(CubbyHole c, int number) {
cubbyhole = c;
this.number = number;
public void run() {
int value = 0;
for (int i = 0; i < 10; i++) {
value = cubbyhole.get();
System.out.println("Consumer #" + this.number
+ " got: " + value);
***********CubbyHole.java***********
public class CubbyHole {
private int contents;
private boolean available = false;
public synchronized int get() {
while (available == false) {
try {
wait();
} catch (InterruptedException e) { }
available = false;
notifyAll();
return contents;
public synchronized void put(int value) {
while (available == true) {
try {
wait();
} catch (InterruptedException e) { }
contents = value;
available = true;
notifyAll();
***********ProducerConsumerTest.java***********
public class ProducerConsumerTest {
public static void main(String[] args) {
CubbyHole c = new CubbyHole();
Producer p1 = new Producer(c, 1);
Consumer c1 = new Consumer(c, 1);
p1.start();
c1.start();

Answer 1

instantiate another consumer.
public class ProducerConsumerTest {
public static void main(String[] args) {
CubbyHole c = new CubbyHole();
Producer p1 = new Producer(c, 1);
Consumer c1 = new Consumer(c, 1);
Consumer c2 = new Consumer(c, 2);
p1.start();
c1.start();
c2.start();
but then modify CubbyHole so that it checks that it has been consumed twice (as thats what you want, you said). Instead of using boolean available, use an integer flag that counts how many times its been consumed, and then reset the flag when it gets to 2. Something like that. Is this a college question? Do your homework. ha ha.