How can I implement file locking in Java?

How can I implement file locking in Java?

You can use the FileChannel class along with FileLock to implement file locking in Java. Would you like a code example?

Yes, please provide a code example.

Here's a simple example:

import java.io.*;
import java.nio.channels.*;

public class FileLockExample {
    public static void main(String[] args) throws IOException {
        RandomAccessFile stream = new RandomAccessFile("example.txt", "rw");
        FileChannel channel = stream.getChannel();
        FileLock lock = channel.lock();
        try {
            // Perform file operations here
        } finally {
            lock.release();
            channel.close();
            stream.close();
        }
    }
}

This code locks the file for exclusive access. Let me know if you have any questions!

What happens if I try to lock a file that's already locked?

If you try to lock a file that's already locked, your thread will block until the lock is released, unless you specify the tryLock() method, which will return null if the lock is not available.