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Thread: Assertion Question

  1. #1
    Java kindergarten chronoz13's Avatar
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    Default Assertion Question

    public class NewClass2 {
     
        public static void main(String[] args) {
     
            int x = 100;
            int y = 20;
     
            assert y > x;
        }
    }

    i want to confirm my understanding, with the basic usage of assertion, as of now, im at the start of the book chapter im reading about assertions

    question:

    does assertion means in layman's term "make sure"
    or in the above code, is it similar to or correct if i would say "make sure y is less than x, when y is set lower than x"?


  2. #2
    Administrator copeg's Avatar
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    Default Re: Assertion Question

    Very similar to your 'make sure' definition. The assertion checks whether something is true...if it is not, the assertion exception is thrown (assuming assertions are enabled). This can get to be a valuable tool in working with larger applications and algorithms, as assertions define something the programmer knows must be true, thus assertion failures define a fundamental flaw in the algorithm/runtime.

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

    chronoz13 (August 16th, 2011)