package chapter01;

import java.util.concurrent.TimeUnit;

/**

* Created by zhangzhao on 2018/8/23.

*/

// 使用synchronized关键字同步类的不同的实例方法，争抢的是同一个monitor lock

// this monitor

public class ClassMonitor {

public static synchronized void method1(){

System.out.println(Thread.currentThread().getName() + " enter to method1");

try {

TimeUnit.MINUTES.sleep(10);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

public static synchronized void method2(){

System.out.println(Thread.currentThread().getName() + " enter to method2");

try {

TimeUnit.MINUTES.sleep(10);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

public void method3(){

synchronized(this) { // 此时 和 在方法前加synchronized 效果一样

System.out.println(Thread.currentThread().getName() + " enter to method3");

try {

TimeUnit.MINUTES.sleep(10);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

public static void main(String[] args){

ClassMonitor thisMonitor = new ClassMonitor();

new Thread(ClassMonitor::method1,"T1").start();

new Thread(ClassMonitor::method2,"T2").start();

new Thread(thisMonitor::method3,"T3").start();

}

}