91.ReentrantLock 实现

public class MyService {
 private Lock lock = new ReentrantLock();
//Lock lock=new ReentrantLock(true);//公平锁
 //Lock lock=new ReentrantLock(false);//非公平锁
 private Condition condition=lock.newCondition();//创建 Condition
 public void testMethod() {
 try {
 lock.lock();//lock 加锁
//1：wait 方法等待：
 //System.out.println("开始 wait");
 condition.await();
//通过创建 Condition 对象来使线程 wait，必须先执行 lock.lock 方法获得锁
//:2：signal 方法唤醒
condition.signal();//condition 对象的 signal 方法可以唤醒 wait 线程
 for (int i = 0; i < 5; i++) {
System.out.println("ThreadName=" + Thread.currentThread().getName()+ (" " + (i + 1)));
 }
 } catch (InterruptedException e) {
 e.printStackTrace();
 }
 finally
 {
 lock.unlock();
 }
 }
}