The best replacement for inputstream is bufferedinputstream.

The best alternatives to inputstream are rated as following:
★★★★★  bufferedinputstream
★★★★  inputstreamreader
★★★★  outputstream
★★★★  fileinputstream
★★★  datainputstream
★★  reader
★  scanner
★  bufferedreader
★  byte array
  inputsource

Your alternative for inputstream is not listed? Suggest!
Speaking about inputstream, one probably shouldn't forget about bufferedreader.

Other search terms related to inputstream and their ratings are:
★★★★★ bufferedreader
You have in mind a companion for inputstream and it is not yet here? Propose!



Google Trends

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inputstream
bufferedinputstream
inputstreamreader