生产者和消费者

/*
 * 在编写代码之前一定要做好类的规划
 */
class Productor implements Runnable {
    Cache c = null;
    Productor(Cache c) {
        this.c = c;
    }
    @Override
    public void run() {
        // TODO Auto-generated method stub
        int i = 1;
        while(true) {
            if(i == 0) {
                c.put("11", "AA");
            }else {
                c.put("22", "BB");
            }
            i = (i+1)%2;
        }
    }
    
}

class Customer implements Runnable {
    Cache c = null;
    Customer(Cache c) {
        this.c = c;
    }
    @Override    
    public void run() {
        // TODO Auto-generated method stub
        while(true) {
            c.get();
        }
    }
    
}
/*
 * 操作一个缓冲区，先检查再读写,
 * wait()：把线程退出CPU，让给其他线程使用
 * notify():通知发出wait()的线程来运行
 */
class Cache {
    private String name = null;
    private String sex = null;
    private boolean isFull = false;
    public synchronized void put(String name,String sex) {
        if(isFull) 
            try{wait();}catch (Exception e) {}
        this.name = name;
        this.sex = sex;
        isFull = true;
        notify(); 
    }
    public synchronized void get() {
        if(!isFull) 
            try{wait();}catch (Exception e) {}
        System.out.print(name + "--");//在输出语句中不可以使用this关键字
        System.out.println(sex);
        isFull = false;
        notify();        
    }
}

public class ThreadConmunication {
    public static void main(String[] args) {
        Cache c = new Cache();//在这里定义一个Cache的对象，目的是让两个线程都使用相同的对象（缓冲区）
        new Thread(new Productor(c)).start();
        new Thread(new Customer(c)).start();
    }
}