try {
File file = new File(“filename”);
FileChannel channel = new RandomAccessFile(file, “rw”).getChannel();FileLock lock = channel.lock();
try {
lock = channel.tryLock();
} catch (OverlappingFileLockException e) {
// File is already locked in this thread or virtual machine
}lock.release();
channel.close();
}catch(Exception e){
}