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 ( );
}
}
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) {
}
}
}
}