关于java多线程的一个生产者和多个消费者

代码如下：
class Q {
int n;
private boolean p = false;

synchronized int get() {
if (!p) {
try {
wait();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
System.out.println("Get: " + n);
p = false;
notify();
return n;
}

synchronized void put(int n) {
if (p)
try {
wait();
} catch (InterruptedException e) {
System.out.println("InterruptedException caught");
}
this.n = n;
System.out.println("Put: " + n);
p = true;
notify();
}
}

class Producer implements Runnable {
Q q;

Producer(Q q) {
this.q = q;
new Thread(this, "Producer").start();
}

public void run() {
int i = 0;
while (true) {
q.put(i++);
}
}
}

class Consumer implements Runnable {
Q q;

Consumer(Q q) {
this.q = q;
new Thread(this, "Consumer1").start();
new Thread(this, "Consumer2").start();
new Thread(this, "Consumer3").start();
}

public void run() {
synchronized (q) {
while (true) {
q.get();
}
}
}
}

class PC {
public static void main(String args[]) {
Q q = new Q();
Thread thread = Thread.currentThread();
new Producer(q);
new Consumer(q);
try {
thread.sleep(10000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("Press Control-C to stop.");
}
}