package com.basic; import java.util.concurrent.TimeUnit; /** * @program JavaBooks * @description: 异常释放锁 * @author: mf * @create: 2019/12/27 23:38 */ public class T5 { private int count = 0; public synchronized void m() { System.out.println(Thread.currentThread().getName() + " start... "); while (true) { count++; System.out.println(Thread.currentThread().getName() + " count = " + count); try { TimeUnit.SECONDS.sleep(1); } catch (InterruptedException e) { e.printStackTrace(); } if (count == 5) { int i = 1 / 0; // 此处抛出异常，锁将被释放，要想不被释放，可以在这里进行catch，然后让循环继续 } } } public static void main(String[] args) { T5 t5 = new T5(); new Thread(() -> t5.m(), "t1").start(); try { TimeUnit.SECONDS.sleep(3); } catch (InterruptedException e) { e.printStackTrace(); } new Thread(() -> t5.m(), "t2").start(); } }