Java开发网 - l类与类之间的关系问题!

Topic: l类与类之间的关系问题!

1.l类与类之间的关系问题!

Posted by: april518
Posted on: 2005-03-09 17:02

代码如下:


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 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);
        }
    }
}


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) { }
        }
    }
}


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) { }
        }
    }
}


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();
    }
}

问:这几个类之间既没有继承关系也没有明显的接口,那么他们是如何调用彼此的方法呢?特别是cubbyhole与 consumer,producer 之间的关系,小弟有一点不明白! 难道放到一个PROJECT里面就可以完成调用了?突然想到的问题,百思不得其解.望各位大哥示下!在此谢过

2.Re:l类与类之间的关系问题! [Re: april518]	Copy to clipboard
Posted by: jfs771 Posted on: 2005-05-18 10:49 public Producer(CubbyHole c, int number) { cubbyhole = c; this.number = number; } public Consumer(CubbyHole c, int number) { cubbyhole = c; this.number = number; } 看看构造函数里的这个CubbyHole c参数，应该就是将实例通过参数的形式通知另一个类实例，本人也是新学的JAVA

3.Re:l类与类之间的关系问题! [Re: april518]	Copy to clipboard
Posted by: leon0122 Posted on: 2005-05-19 17:08 以上的程序都是传递对象。比如说，在类A中，有一个类B的对象，那么，在类A中可以通过类B的对象来调用类B的方法，去实现你想要的操作，上面的程序就是这个原理

4.Re:l类与类之间的关系问题! [Re: april518]	Copy to clipboard
Posted by: 2352439 Posted on: 2005-05-19 19:03 class A { String name="guofeng"; public void getInfo() { System.out.println(name); } } class B { public static void main(String[] args) { A a = new A(); a.getInfo(); } } See this procedure, you are a little bit understand?