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Thread: Counter

  1. #1
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    Default Counter

    Hello everyone,
    I have this project for homework where I need to create one super class(Solids) and three subclasses (Cylinder, Cone and Sphere). The exercise says "... there will be a counter for each type of solid, so that we know how many have been created (of each type)...". My question is, is there a way that I can create the counter ONCE and then use it for all the subclasses? If so, how do I do that? (NOTE: I am familiar with the homework policy and I am not asking for the code, just a hint or something).
    Thank you


  2. #2
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    Default Re: Counter

    In each subclass declare a static variable counter.
    Increment it in the constructor itself
    for e.g
    class Cylinder extends Solids{
    static int counter1;
    Cylinder(){
    counter1=counter1+1;
    }

  3. The Following User Says Thank You to hurrah For This Useful Post:

    mssim (November 7th, 2012)

  4. #3
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    Default Re: Counter

    Static, yes. Thanks

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