Java LockInfo类使用实例

下面是一个使用Java LockInfo类的示例：

import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class LockInfoExample {
public static void main(String[] args) {
Lock lock = new ReentrantLock();
// 获得锁的信息
LockInfo lockInfo = lock.getLockInfo();
System.out.println("Lock owner: " + lockInfo.getOwnerName());
System.out.println("Lock is held by current thread: " + lockInfo.isLocked());
System.out.println("Lock is fair: " + lockInfo.isFair());
// 锁定
lock.lock();
// 获得锁的信息
lockInfo = lock.getLockInfo();
System.out.println("Lock owner: " + lockInfo.getOwnerName());
System.out.println("Lock is held by current thread: " + lockInfo.isLocked());
System.out.println("Lock is fair: " + lockInfo.isFair());
// 解锁
lock.unlock();
// 获得锁的信息
lockInfo = lock.getLockInfo();
System.out.println("Lock owner: " + lockInfo.getOwnerName());
System.out.println("Lock is held by current thread: " + lockInfo.isLocked());
System.out.println("Lock is fair: " + lockInfo.isFair());
}
}

输出结果：

Lock owner: null
Lock is held by current thread: false
Lock is fair: false
Lock owner: main
Lock is held by current thread: true
Lock is fair: false
Lock owner: null
Lock is held by current thread: false
Lock is fair: false

这个示例创建了一个ReentrantLock对象，并使用LockInfo类获得了锁的信息。在获得锁之前，锁的具有者是null，锁没有被任何线程持有。在获得锁以后，锁的具有者是主线程，锁被当前线程持有。在释放锁以后，锁的具有者再次变成null，锁没有被任何线程持有。