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  1. #1
    neveser is offline Member
    Join Date
    Nov 2012
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    Default Validate user input (positive and numerical)

    I can't figure out a way to validate user input. The input needs to be both positive and numerical.
    So far the code won't accept any letters, but it still accepts negative numbers.

    Java Code:
    //Get input (minutes and payment) from user
            minutesIn = Double.parseDouble(minutesField.getText());
            paymentIn = Double.parseDouble(paymentField.getText());
            catch(Exception e)
    I am a total noob here and the books I have don't seem to cover this. Actually, both books don't seem to cover much of anything I need.

  2. #2
    Tolls is offline Moderator
    Join Date
    Apr 2009
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    Default Re: Validate user input (positive and numerical)

    So check the values.
    Create a validate<whatever those values represent>() method that checks them and returns false if they aren't valid, or even throws an exception.
    Please do not ask for code as refusal often offends.

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