前言
本系列记录Java从入门开始的知识点，本文主要介绍线程协作。
一、生产者和消费者问题
二、管程法解决
package Thread.communication;
//生产者消费者模型
public class TestPC {
public static void main(String[] args) {
SynContainer container = new SynContainer();
new Productor(container).start();
new Consumer(container).start();
}
}
class Productor extends Thread{
SynContainer container;
public Productor(SynContainer container){
this.container = container;
}
@Override
public void run() {
for (int i = 0; i < 100; i++) {
container.push(new Chicken(i));
System.out.println("生产了第"+i+"只鸡");
}
}
}
class Consumer extends Thread{
SynContainer container;
public Consumer(SynContainer container){
this.container = container;
}
@Override
public void run() {
for (int i = 0; i < 100; i++) {
System.out.println("消费了第-->"+container.pop().id+"只鸡");
}
}
}
class Chicken{
int id;
public Chicken(int id) {
this.id = id;
}
}
class SynContainer{
Chicken[] chickens = new Chicken[10];
int count = 0;
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) {
e.printStackTrace();
}
}
//如果没有满，就要生产产品
chickens[count] = chicken;
count++;
this.notifyAll();
}
public synchronized Chicken pop(){
if(count == 0){
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
count--;
Chicken chicken = chickens[count];
this.notifyAll();
return chicken;
}
}
三、信号灯法
package Thread.communication;
public class TestPC2 {
public static void main(String[] args) {
TV tv = new TV();
new Player(tv).start();
new Wathcher(tv).start();
}
}
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("甄嬛传");
}else{
this.tv.play("今年过年不收礼呀");
}
}
}
}
class Wathcher extends Thread{
TV tv;
public Wathcher(TV tv){
this.tv = tv;
}
@Override
public void run() {
for (int i = 0; i < 20; i++) {
tv.watch();
}
}
}
class TV {
String voice;
boolean flag = true;
public synchronized void play(String voice){
if(!flag){
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
System.out.println("演员表演了："+voice);
this.notifyAll();
this.voice = voice;
this.flag = !this.flag;
}
public synchronized void watch(){
if(flag){
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
System.out.println("观看了"+voice);
this.notifyAll();
this.flag = !this.flag;
}
}
四、线程通信
五、线程池
package Thread.communication;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class TestPool {
public static void main(String[] args) {
ExecutorService service = Executors.newFixedThreadPool(10);
service.execute(new MyThread());
service.execute(new MyThread());
service.execute(new MyThread());
service.execute(new MyThread());
service.execute(new MyThread());
service.shutdown();
}
}
class MyThread implements Runnable{
@Override
public void run() {
for (int i = 0; i < 10; i++) {
System.out.println(Thread.currentThread().getName()+i);
}
}
}