Java LockInfo类使用实例

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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();
// 获取锁的信息
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();
// 获取锁的信息
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();
// 获取锁的信息
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 类获取了锁的信息。在获取锁之前，锁的拥有者是 null，锁没有被任何线程持有。在获取锁之后，锁的拥有者是主线程，锁被当前线程持有。在释放锁之后，锁的拥有者再次变为 null，锁没有被任何线程持有。

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