Can multiple RandomAccessFile objects write data to same file?

 public class WriteThread extends Thread{

        @Override
        public void run() {
            RandomAccessFile randomAccessFile = new RandomAccessFile(fileName, "rwd");
            randomAccessFile.seek(threadPosition);
            byte[] buffer = new byte[1024 * 8];
            randomAccessFile.write(buffer, 0, threadLength);
        }
    }

In my code, each thread writes data to the same file through respective RandomAccessFile object.Does that need to be synchronized? Sorry for my poor English.