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No, I'm saying you are already using a BufferedInputStream and a BufferedOutputStream. That is the problem: you aren't guaranteeing your output matches your input.

Try doing this:

    dd if=/dev/random of=test_file bs=4000 count=100
    java YourClass < test_file > test_output
    diff test_file test_output


Here's the simpler, likely slower, but nonetheless actually correct solution: https://gist.github.com/cbsmith/9755809


Oh, gotcha. The code above with "byte[] buffer" also works since write(byte[], int, int) flushes.




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