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  1. #1
    Lowest0ne is offline Member
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    Apr 2012
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    Default What to return upon failure of a generic function

    Hi all,

    I'm making myself a simple stack container (it's an array with push/pop). I've got it working with int, but now am trying to bring it over to being generic. My code:
    Java Code:
      public E pop()
        if (position == 0) return 0;
        return stack[--position];
    I've faltered at line 3. What to return? Should I throw an exception? Doe Java already have an exception handle for this?
    Last edited by Lowest0ne; 09-16-2012 at 04:37 AM.

  2. #2
    pbrockway2 is offline Moderator
    Join Date
    Feb 2009
    New Zealand
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    Default Re: What to return upon failure of a generic function

    There's IllegalStateException. And java.util.Stack throws an EmptyStackException.

    Both extend RuntimeException for the implications of which see the Exceptions chapter of Oracle's Tutorial.

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