JDK并发包---(3)重入锁ReentrantLock：锁申请等待限时

import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.ReentrantLock;

public class TimeLock implements Runnable {
public static ReentrantLock lock = new ReentrantLock();

@Override
public void run() {
try {
if (lock.tryLock(5, TimeUnit.SECONDS)) {
System.out.println(Thread.currentThread().getId() + ":get lock successed!");
Thread.sleep(6000);
} else {
System.out.println(Thread.currentThread().getId() + ":get lock failed!");
}
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
if (lock.isHeldByCurrentThread()) {
System.out.println(Thread.currentThread().getId() + ":unlock");
lock.unlock();
}
}
}

public static void main(String args[]) {
TimeLock tl = new TimeLock();

Thread t1 = new Thread(tl);
Thread t2 = new Thread(tl);

t1.start();
t2.start();
}
}