java中文件的状态

Question

如何知道文件的状态，即如果应用程序被阻塞并且阻塞。在Java中，如果有这样的API或者您可以使用Java IO。

谢谢。

Answer 1

如果你问有关文件锁，从Example Depot下面的例子演示了如何使用它：

try { 
    // Get a file channel for the file 
    File file = new File("filename"); 
    FileChannel channel = new RandomAccessFile(file, "rw").getChannel(); 

    // Use the file channel to create a lock on the file. 
    // This method blocks until it can retrieve the lock. 
    FileLock lock = channel.lock(); 

    // Try acquiring the lock without blocking. This method returns 
    // null or throws an exception if the file is already locked. 
    try { 
     lock = channel.tryLock(); 
    } catch (OverlappingFileLockException e) { 
     // File is already locked in this thread or virtual machine 
    } 

    // Release the lock 
    lock.release(); 

    // Close the file 
    channel.close(); 
} catch (Exception e) { 
}