管程法
生产者 消费者 缓冲区 产品
package gaoji;
//测试生产者消费者模型-->利用缓冲区解决:管程法
//生产者、消费者、产品、缓冲区
public class TestPC {
public static void main(String[] args) {
SynContainer container = new SynContainer();
new Producer(container).start();
new Consumer(container).start();
}
}
//生产者
class Producer extends Thread{
SynContainer container;
public Producer(SynContainer container){
this.container = container;
}
//生产
@Override
public void run() {
for (int i = 0; i < 100; i++) {
container.push(new Chicken(i));
System.out.println("生产了"+i+"只鸡");
}
}
}
//消费者
class Consumer extends Thread{
SynContainer container;
public Consumer(SynContainer container){
this.container = container;
}
//消费
@Override
public void run() {
for (int i = 0; i < 100; i++) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
System.out.println("消费了-->"+container.pop().id+"只鸡");
}
}
}
//产品
class Chicken{
int id;//产品编号
public Chicken(int id) {
this.id = id;
}
}
//缓冲区
class SynContainer{
//需要一个容器大小
Chicken[] chickens = new Chicken[10];
//容器计数器
int count = 0;
//生产者放入产品
public synchronized void push(Chicken chicken){
//如果容器满了,就需要等待消费者消费
if(count==chickens.length){
//通知消费者消费,生产等待
try {
this.wait();
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
//如果没有满,则需要丢入产品
chickens[count] = chicken;
count++;
//可以通知消费者消费了
this.notify();
}
//消费者消费产品
public synchronized Chicken pop(){
//判断能否消费
if (count==0){
//等待生产者生产,消费者等待
try {
this.wait();
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
//如果可以消费
count--;
Chicken chicken = chickens[count];
//吃完了,通知消费者生产
this.notify();
return chicken;
}
}

信号灯法
flag
package gaoji;
//测试生产者消费者问题2;信号灯法,标志位解决
public class TestPC2 {
public static void main(String[] args) {
TV tv = new TV();
new Player(tv).start();
new Watcher(tv).start();
}
}
//生产者-->演员
class Player extends Thread{
TV tv;
public Player(TV tv) {
this.tv = tv;
}
@Override
public void run() {
for (int i = 0; i < 20; i++) {
if (i%2==0){
this.tv.play("快乐大本营播放中");
}else {
this.tv.play("抖音:记录美好生活");
}
}
}
}
//消费者-->观众
class Watcher extends Thread{
TV tv;
public Watcher(TV tv) {
this.tv = tv;
}
@Override
public void run() {
for (int i = 0; i < 20; i++) {
tv.watch();
}
}
}
//产品-->节目
class TV{
//演员表演,观众等待
//观众观看,演员等待
String voice;//表演的节目
boolean flag = true;
//表演
public synchronized void play(String voice){
if (!flag){
try {
this.wait();
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
System.out.println("演员表演了"+voice);
//通知观众观看
this.notifyAll();//通知唤醒
this.voice = voice;
this.flag = !this.flag;
}
//观看
public synchronized void watch(){
if (flag){
try {
this.wait();
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
System.out.println("观看了"+voice);
//通知演员表演
this.notifyAll();
this.flag = !this.flag;
}
}

线程池初步
package gaoji;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
//测试线程池
public class TestPool {
public static void main(String[] args) {
//1、创建服务,创建线程池
//newFixedThreadPool 参数为线程池大小
ExecutorService service = Executors.newFixedThreadPool(10);
//执行
service.execute(new MyThread());
service.execute(new MyThread());
service.execute(new MyThread());
service.execute(new MyThread());
//2、关闭连接
service.shutdown();
}
}
class MyThread implements Runnable{
@Override
public void run() {
System.out.println(Thread.currentThread().getName());
}
}
