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Thread: Beginner for Java, need help with this code I wrote

  1. #26
    Super Moderator Norm's Avatar
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    Default Re: Beginner for Java, need help with this code I wrote

    Your IDE is executing the java command with a classname. It builds a commandline:
    java <classnamehere>
    The contents of the error message makes it look like the classname being used is: Cards$Suits
    Somewhere in the IDE you specify what classname is to be used. I have no idea how to setup your IDE so that it picks the correct classname to use.
    The classname to use should be changed to Cards.

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    Default Re: Beginner for Java, need help with this code I wrote

    Oh....

    Well, it was already defined as Cards, see:

    public class Cards {
     
    	enum Suits { Club, Diamond, Spade, Heart }
     
    	    public static void main(String[] arg)  {

  3. #28
    Super Moderator Norm's Avatar
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    Default Re: Beginner for Java, need help with this code I wrote

    Here is an example of the use of the java command with the wrong classname and the right one:

    Microsoft Windows XP [Version 5.1.2600]
     
    D:\JavaDevelopment\Testing\ForumQuestions8>java Cards$Suits      <<<<<<<<< THE WRONG classname
    Exception in thread "main" java.lang.NoSuchMethodError: main
     
    D:\JavaDevelopment\Testing\ForumQuestions8>dir Cards*
     Volume in drive D is Work
     Volume Serial Number is 0C24-B38C
     
     Directory of D:\JavaDevelopment\Testing\ForumQuestions8
     
    02/13/2012  09:39 PM             1,024 Cards$Suits.class
    02/13/2012  09:39 PM             1,228 Cards.class
    02/13/2012  09:41 PM               996 Cards.java
                   3 File(s)          3,248 bytes
                   0 Dir(s)   7,020,515,328 bytes free
     
    D:\JavaDevelopment\Testing\ForumQuestions8>java Cards              <<<<<<<<<<< The correct classname
    I'm thinking of a suit. Can you guess what it is?You got it wrong.
    D:\JavaDevelopment\Testing\ForumQuestions8>

    The error message you are getting must be coming from your IDE.
    You'll need to ask someone why it gives that error message. The javac compiler does not give any errors when compiling your code.
    Last edited by Norm; February 14th, 2012 at 09:20 AM.

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    Default Re: Beginner for Java, need help with this code I wrote

    Hmmm.......

    Alright, I just don't know who to ask.

  5. #30
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    Default Re: Beginner for Java, need help with this code I wrote

    The forum has an IDE section. Try asking there.
    Java IDEs

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    Default Re: Beginner for Java, need help with this code I wrote

    Thanks.

    -Silent

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