pc2.java

nanjing university cs 的java课件。 对新手很有用。付课件中源码。

public class PC2 {
    public static void main(String args[]) {
        Q q = new Q();
        new Producer(q);
        new Consumer(q);
    }
}

class Q {
    int n;
    boolean valueSet = false;
    synchronized int get() {
        if (!valueSet){
            try {
                wait();
            }
            catch (InterruptedException e) {
            }
        }
        System.out.println("Got:" + n);
        valueSet = false;
        notify();
        return n;
    }

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

class Consumer
    implements Runnable {
    Q q;
    Consumer(Q q) {
        this.q = q;
        new Thread(this, " Consumer ").start();
    }

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

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++);
        }
    }
}