faicm的专栏

maven依赖 <dependency> <groupId>com.auth0</groupId> <artifactId>java-jwt</artifactId> <version>3.2.0</version>&l

package com.wang.lock;public class QNode { volatile boolean locked;}package com.wang.lock;public interface Lock {void lock();void unlock();}package com.wang.lock;import java.uti...