一、簡介

JDK提供了Lock介面來實現更豐富的鎖控制，ReentrantLock即Lock介面的實現

JDK文件：http://tool.oschina.net/uploads/apidocs/jdk-zh/java/util/concurrent/locks/ReentrantLock.html

二、程式碼示例

import java.util.concurrent.locks.ReentrantLock;

public class ReentrantLockDemo {
    private static ReentrantLock lock = new ReentrantLock();

    
 
public static void main(String[] args) throws InterruptedException {
        new Thread(() -> {
            lock.lock();
            System.out.println(Thread.currentThread().getName());
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            lock.unlock();
        }).start();
        Thread.sleep(
 
10);
        lock.lock();
        System.out.println("main");
        lock.unlock();
    }

}