The behavior of the file lock is platform-dependent. On some platforms, the file lock is advisory, which means that unless an application checks for a file lock, it will not be prevented from accessing the file. On other platforms, the file lock IS Mandatory, Which Means That A File Lock Prevents Any Application from Accessing The File.
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) {
}
