java-生产者消费者模式

经常会有公司叫我们手撕代码，比如网易，阿里，那我们是不是该掌握下呢。下面这段代码来自《现代操作系统》进程与线程P49页。

public class ProducerConsumer {public ProducerConsumer() { }private static final int N = 100;static Producer producer = new Producer();static Consumer consumer = new Consumer();static Monitor monitor = new Monitor();private static class Producer extends Thread {@Overridepublic void run() {//你生产的对象int item;while(true) {item = produce_item();monitor.insert(item);   }}public int produce_item() {//TODO你需要生产的对象}}private static class Consumer extends Thread {@Overridepublic void run() {//你打算消费的对象int item;while(true) {item = monitor.remove();consumer_item(item);    }}private int consumer_item(int item) {// TODO Auto-generated method stub}}private static class Monitor {//存放对象的容器LinkedList<Integer> buffer = new LinkedList<>();int count =0;public synchronized void insert(int item) {if(count == N) {try {wait();} catch (InterruptedException e) {e.printStackTrace();}}buffer.add(item);count++;if(count == 1) {notifyAll();}}public synchronized int remove() {if(count == 0) {try {wait();} catch (InterruptedException e) {e.printStackTrace();}}int val = buffer.getFirst();buffer.remove();count--;if(count == N-1) {notifyAll();    }return val;}public static void main(String[] args) {producer.start();consumer.start();}
}