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Thread: Looping an inputstream

  1. #1
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    Default Looping an inputstream

    So I am trying to write some code that checks each char of an inputstream if it is a number and adds them up. I can handle most of it but it is just that I don't really understand inputstreams.

    I want to write a simple for loop for checking each char but I am not sure how I would check in input stream I was thinking something like:

    for(int i = 0; i < ???; i++){
         if(???? == [0-9]){
    I just don't know how I would put those parts in for an inputstream

  2. #2
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    Default Re: Looping an inputstream

    InputStreams work on bytes, not chars. If you want chars, you need to wrap your InputStream in an InputStreamReader. As you can see from the API docs for the read() method, it returns -1 when the end of stream is reached.

    Check out I/O Streams in the Java Tutorial for examples.

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