How do I peek at the first two bytes in an InputStream?

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For a general InputStream, I would wrap it in a BufferedInputStream and do something like this:

BufferedInputStream bis = new BufferedInputStream(inputStream);
bis.mark(2);
int byte1 = bis.read();
int byte2 = bis.read();
bis.reset();
// note: you must continue using the BufferedInputStream instead of the inputStream

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