package com.basic;

import java.util.concurrent.TimeUnit;

/**

* @program JavaBooks

* @description: 锁粒度

* @author: mf

* @create: 2019/12/29 00:23

*/

public class T8 {

private int count = 0;

synchronized void m1() {

// 锁粒度较粗，锁的东西较多

try {

TimeUnit.SECONDS.sleep(2);

} catch (InterruptedException e) {

e.printStackTrace();

}

count++;

try {

TimeUnit.SECONDS.sleep(2);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

void m2() {

// 锁粒度较细， 锁的东西较少， 运行时间比上面快

try {

TimeUnit.SECONDS.sleep(2);

} catch (InterruptedException e) {

e.printStackTrace();

}

synchronized (this) {

count++; //

}

}

}