Java I/O How to - Create a File Lock on a File

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Question

We would like to know how to create a File Lock on a File.

Answer

/*from  w w  w  . ja v  a2 s.c o m*/
import java.io.File;
import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;
import java.nio.channels.FileLock;

public class Main {
  public static void main(String[] argv) throws Exception {
    File file = new File("filename");
    FileChannel channel = new RandomAccessFile(file, "rw").getChannel();

    FileLock lock = channel.lock();

    lock = channel.tryLock();

    lock.release();

    channel.close();
  }
}

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