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 {
@Override
public 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 {
@Override
public 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();
}
}