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Thread: Verifying a String

  1. #1
    Junior Member
    Join Date
    Mar 2019
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    Default Verifying a String


    I'm currently completing a task. The question goes:

    "Write a method called checkISBN( ) to verify the ISBN of each book. The ISBN is valid if

    • the number of characters is 10.
    • the first character is a letter in uppercase

    Return a String "Valid" if the ISBN is correct otherwise return "Invalid".

    So far, I have determined the following:

    - the length( ) method is used.
    -the charAt(0) method is used.
    - I have access to a private String variable called "isbn".
    - I will need to use an if...else statement.

    Its just that I'm struggling to put all of it together.

    Please help.


  2. #2
    Super Moderator Norm's Avatar
    Join Date
    May 2010
    Eastern Florida
    Thanked 2,460 Times in 2,411 Posts

    Default Re: Verifying a String

    Can you post the code you are working on with any questions you have?

    Be sure to wrap your code with code tags:


    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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