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Thread: How to check if a user input is a char or a int

  1. #1
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    Default How to check if a user input is a char or a int

    so yeah i got this problem. i have to do a program and the first part of it is user input.
    i have 5 choices. 4 are an int and one is a char.
    heres the code i got so far.
    int reponse;
    System.out.println("1-Plus longue repetition de nucleotide");
    System.out.println("2-Liste des sous-sequences communes");
    System.out.println("3-Plus longue sous-sequence communes");
    System.out.println("4-Alignement optimal");
    System.out.println("q-Quitter");
    reponse = Keyboard.readInt();
    System.out.println(reponse);
    if (reponse == 1)
    {
    }
    if (reponse == 2)
    {
    }
    if (reponse == 3)
    {
    }
    if (reponse == 4)
    {
    }
    oh and btw the keyboard class is a class my teach gave me for my class cause we are complete beginners its basically used for user input.
    so as you can see i did an if for all the int reponse but what about if the user enters q? how do i check it?
    sorry if its in french but the code is still in english right.

    looking forward to your help

    Blackbird94


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    Default Re: How to check if a user input is a char or a int

    http://www.asciitable.com/index/asciifull.gif

    Answer is in the image really.
    Look at the decimal values.
    Please use [highlight=Java]//code goes here...[/highlight] tags when posting your code

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    Default Re: How to check if a user input is a char or a int

    dosent seem like java is giving any value to "reponse" when i enter q. I tried printing it out it just gives 0

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    Default Re: How to check if a user input is a char or a int

    What errors are you getting? What did you try to solve the issue? What should It be doing?
    Please use [highlight=Java]//code goes here...[/highlight] tags when posting your code

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