所有对象继承Object方法
用于同步资源锁控制等待以及唤醒
Demo:
Message 类同步资源
Waiter 持有Msg,New两个线程Waiter等待
Notifier 持有Msg,通过Msg通知Waiter线程继续
package com.example.demo.java.base.wait;
/**
* message 锁资源
* waiter 等待者
* notifier 通知者
* @author kyle
* @date 2023/12/17
*/
public class Client {
public static void main(String[] args) {
Message msg = new Message("process it");
Waiter waiter = new Waiter(msg);
new Thread(waiter,"waiter").start();
Waiter waiter1 = new Waiter(msg);
new Thread(waiter1, "waiter1").start();
Notifier notifier = new Notifier(msg);
new Thread(notifier, "notifier").start();
System.out.println("All the threads are started");
}
public static class Message {
private String msg;
public Message(String str){
this.msg=str;
}
public String getMsg() {
return msg;
}
public void setMsg(String str) {
this.msg=str;
}
}
public static class Waiter implements Runnable {
private Message msg;
public Waiter(Message m){
this.msg=m;
}
@Override
public void run() {
String name = Thread.currentThread().getName();
synchronized (msg) {
try{
System.out.println(name+" waiting to get notified at time:"+System.currentTimeMillis());
msg.wait();
}catch(InterruptedException e){
e.printStackTrace();
}
System.out.println(name+" waiter thread got notified at time:"+System.currentTimeMillis());
//process the message now
System.out.println(name+" processed: "+msg.getMsg());
}
}
}
public static class Notifier implements Runnable {
private Message msg;
public Notifier(Message msg) {
this.msg = msg;
}
@Override
public void run() {
String name = Thread.currentThread().getName();
System.out.println(name+" started");
try {
Thread.sleep(1000);
synchronized (msg) {
msg.setMsg(name+" Notifier work done");
msg.notify();
// msg.notifyAll();
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}