working from several threads on the same file

Question

Is it possible to access the same file and manipulate it from different working processes/thread at the same time?

If i open a file using the next code for example:

public static void main(String[] args){
    String dir = System.getProperty("user.dir");
    String path = dir + "/rfa.txt";

    try {
        RandomAccessFile file = new RandomAccessFile(path, "rw");
        file.seek(0);
        file.write("Hello world".getBytes());
        System.out.println(new String(bt));

        file.seek(30);
        file.write("Goodbye world".getBytes());

        file.close();
    } 
    catch (FileNotFoundException ex) {ex.printStackTrace();} 
    catch (IOException ex) {ex.printStackTrace();}
}

and i am running in a loop constantly. Can i open the same file from a different application and manipulate the data inside (read it or write new stuff), while the file still opened?

thank you for your help.