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Thread: CommaND Prompt:class, interface, or enum expected

  1. #1
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    Default CommaND Prompt:class, interface, or enum expected

    i am a beginner. i want print a number on the system with this code:

    int myNum=33 ;
    System.out.println(myNum) ;

    command prompt rather put this out:


    C:\Users\HP\Documents>javac myNum.java
    myNum.java:1: error: class, interface, or enum expected
    int myNum=33 ;
    ^
    myNum.java:1: error: class, interface, or enum expected
    int myNum=33 ;
    ^
    myNum.java:2: error: class, interface, or enum expected
    System.out.println(myNum) ;
    ^
    3 errors

    pls, are these errors from my code or whaT?
    Last edited by Chinedu & ICT; December 27th, 2019 at 05:08 PM.

  2. #2
    Super Moderator Norm's Avatar
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    Default Re: CommaND Prompt:class, interface, or enum expected

    All executable statements must be inside of a method that is in a class.

    The code that was posted does not show where the statements with the errors are located.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: CommaND Prompt:class, interface, or enum expected

    Quote Originally Posted by Norm View Post
    All executable statements must be inside of a method that is in a class.

    The code that was posted does not show where the statements with the errors are located.
    I made myNum into a class MyNum, and rewrote the code to:
    public class MyNum {
    int MyNum=147;
    System.out.println( MyNum ) ;
    }

    when i compiled the above code, this is the output:


    C:\Users\HP\Documents>javac MyNum.java
    MyNum.java:3: error: <identifier> expected
    System.out.println( MyNum ) ;
    ^
    MyNum.java:3: error: <identifier> expected
    System.out.println( MyNum ) ;
    ^
    2 errors

    please is my code right? I'm working on the identifier.
    Last edited by Chinedu & ICT; December 28th, 2019 at 05:20 PM.

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: CommaND Prompt:class, interface, or enum expected

    The code must be inside of a method.
    https://docs.oracle.com/javase/tutor...O/methods.html
    If you don't understand my answer, don't ignore it, ask a question.

  5. #5
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    Smile Re: CommaND Prompt:class, interface, or enum expected

    Quote Originally Posted by Norm View Post
    The code must be inside of a method.
    https://docs.oracle.com/javase/tutor...O/methods.html
    problem solved. thank you. this is the code that was compiled:

    public class MyNum {
        public static void main(String[] args) {
           int MyNum=147;
               System.out.println( MyNum ) ;
        }
    }

    cmd.exe:

    Microsoft Windows [Version 6.1.7601]
    Copyright (c) 2009 Microsoft Corporation. All rights reserved.

    C:\Users\HP>cd Documents

    C:\Users\HP\Documents>javac MyNum.java

    C:\Users\HP\Documents>java MyNum
    147

    C:\Users\HP\Documents>

    but please in the former code i used
    public class MyNum {
        int MyNum=147;
           System.out.println(MyNum);
    }

    cmd.exe output:Identifier expected.
    which identifier is missing in the codelines?
    Last edited by Chinedu & ICT; December 28th, 2019 at 05:42 PM.

  6. #6
    Super Moderator Norm's Avatar
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    Default Re: CommaND Prompt:class, interface, or enum expected

    The method definition was missing.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: CommaND Prompt:class, interface, or enum expected

    Quote Originally Posted by Norm View Post
    The method definition was missing.
    how? i don't understand.

  8. #8
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    Default Re: CommaND Prompt:class, interface, or enum expected

    The code with the error did not have a method to contain the two statements.
    If you don't understand my answer, don't ignore it, ask a question.

  9. #9
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    Default Re: CommaND Prompt:class, interface, or enum expected

    Quote Originally Posted by Norm View Post
    The code with the error did not have a method to contain the two statements.
    a method, as in
    public static void main(String[] args)

  10. #10
    Super Moderator Norm's Avatar
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    Default Re: CommaND Prompt:class, interface, or enum expected

    Yes that is how a method is declared. Did you go to the link I posted?

    https://docs.oracle.com/javase/tutor...O/methods.html
    If you don't understand my answer, don't ignore it, ask a question.

  11. The Following User Says Thank You to Norm For This Useful Post:

    Chinedu & ICT (December 29th, 2019)

  12. #11
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    Default Re: CommaND Prompt:class, interface, or enum expected

    yep! viewing it.am starting from declaring classes.



    whats ds trackback input field for?

  13. #12
    Super Moderator Norm's Avatar
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    Default Re: CommaND Prompt:class, interface, or enum expected

    Where did you see that?
    If you don't understand my answer, don't ignore it, ask a question.

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