ReentrantLock简单实现2

ReentrantLock：

　　

 /**
  *    ReentrantLock测试逻辑类
  */
 public class MyService {
     private Lock lock = new ReentrantLock();//获取锁对象

     public void methodA() {
         try {
             lock.lock();
             System.out.println("methodA:----begin" + Thread.currentThread().getName() + "----" + System.currentTimeMillis());
             Thread.sleep(2000);
             System.out.println("methodA:----end" + Thread.currentThread().getName() + "----" + System.currentTimeMillis());
         } catch (InterruptedException e) {
             e.printStackTrace();
         }finally {
             lock.unlock();
         }
     }

     public void methodB() {
         try {
             lock.lock();
             System.out.println("methodB:----begin" + Thread.currentThread().getName() + "----" + System.currentTimeMillis());
             Thread.sleep(2000);
             System.out.println("methodB:----end" + Thread.currentThread().getName() + "----" + System.currentTimeMillis());
         } catch (InterruptedException e) {
             e.printStackTrace();
         }finally {
             lock.unlock();
         }
     }
 }

 /**
  *    线程A
  */
 public class ThreadA extends Thread {

     private MyService service;

     public ThreadA(MyService service) {
         this.service = service;
     }

     @Override
     public void run() {
         service.methodA();
     }
 }

 /**
  *    线程AA
  */
 public class ThreadAA extends Thread {

     private MyService service;

     public ThreadAA(MyService service) {
         this.service = service;
     }

     @Override
     public void run() {
         service.methodA();
     }
 }

 /**
  *    线程B
  */
 public class ThreadB extends Thread {

     private MyService service;

     public ThreadB(MyService service) {
         this.service = service;
     }

     @Override
     public void run() {
         service.methodB();
     }
 }

 /**
  *    线程BB
  */
 public class ThreadBB extends Thread {

     private MyService service;

     public ThreadBB(MyService service) {
         this.service = service;
     }

     @Override
     public void run() {
         service.methodB();
     }
 }

 /**
  *    测试类
  */
 public class Run {

     public static void main(String[] args) {
         MyService service = new MyService();

         ThreadA a = new ThreadA(service);
         a.setName("A");
         a.start();
         ThreadAA aa = new ThreadAA(service);
         aa.setName("AA");
         aa.start();

         ThreadB b = new ThreadB(service);
         b.setName("B");
         b.start();
         ThreadBB bb = new ThreadBB(service);
         bb.setName("BB");
         bb.start();
     }
 }

运行结果如下：