1. What are producers and consumers
In the thread world, the producer is the thread that produces data, and the consumer is the thread that consumes data.
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
/**
* @ClassName:Restraurant
* @Description:何为生产者与消费者
* @author:
* @date:2018年5月3日
*/
public class Restraurant {
Meal m=null;
Chef chef=new Chef(this);
WaitPerson wait=new WaitPerson(this);
ExecutorService service=Executors.newCachedThreadPool();
public Restraurant() {
service.execute(chef);
service.execute(wait);
}
public static void main(String[] args) {
new Restraurant();
}
}
/**
* @ClassName:Meal
* @Description:生产者生成的数据
* @author:
* @date:2018年5月3日
*/
class Meal{
private final int orderNum;//食物订单编号
public Meal(int num){
orderNum=num;
}
public String toString(){
return "Meal"+orderNum;
}
}
/**
* @ClassName:Chef
* @Description:厨师类，及生产者
* @author:
* @date:2018年5月3日
*/
class Chef implements Runnable{
Restraurant r;
int count=0;
public Chef(Restraurant r) {
this.r=r;
}
@Override
public void run() {
try{
while(!Thread.interrupted()){
synchronized (this) {
while(r.m!=null){
System.out.println("厨师等待中");
wait();//等待服务员取餐
}
}
if(count++==10){
System.out.println("今日已售完");
r.service.shutdownNow();
}
System.out.println("订单完成，服务员取餐");
synchronized (r.wait) {
r.m=new Meal(count);
r.wait.notifyAll();
}
TimeUnit.SECONDS.sleep(1);
}
}catch (InterruptedException e) {
System.out.println("生产者线程强制中断");
}
}
}
/**
* @ClassName:WaitPerson
* @Description:服务员类，即消费者
* @author:
* @date:2018年5月3日
*/
class WaitPerson implements Runnable{
Restraurant r;
public WaitPerson(Restraurant r) {
this.r=r;
}
@Override
public void run() {
try {
while (!Thread.interrupted()) {
synchronized (this) {
while (r.m == null) {
System.out.println("服务员等待中");
wait();// 等待厨师生成食物
}
}
System.out.println("服务员以取餐" + r.m);
synchronized (r.chef) {
r.m = null;
r.chef.notifyAll();
}
}
} catch (InterruptedException e) {
System.out.println("消费者线程强制中断");
}
}
}