How to check if a file is open by another process (Java/Linux)?

Question

I am trying to check if a certain java.io.File is open by an external program. On windows I use this simple trick:

try {
    FileOutputStream fos = new FileO         


        

Answer 1

This one should also work for Windows systems. But attention, does not work for Linux!

     private boolean isFileClosed(File file) {  
            boolean closed;
            Channel channel = null;
            try {
                channel = new RandomAccessFile(file, "rw").getChannel();
                closed = true;
            } catch(Exception ex) {
                closed = false;
            } finally {
                if(channel!=null) {
                    try {
                        channel.close();
                    } catch (IOException ex) {
                        // exception handling
                    }
                }
            }
            return closed;
    }