FileInputStream fileInputStream = new FileInputStream(tmpFile);
FileChannel fileChannelRead = fileInputStream.getChannel();
MappedByteBuffer mmbRead = fileChannelRead.map(MapMode.READ_ONLY, 0,
fileChannelRead.size());
assertEquals(mmbRead, mmbRead.load());
RandomAccessFile randomFile = new RandomAccessFile(tmpFile, "rw");
FileChannel fileChannelReadWrite = randomFile.getChannel();
MappedByteBuffer mmbReadWrite = fileChannelReadWrite.map(
FileChannel.MapMode.READ_WRITE, 0, fileChannelReadWrite.size());