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Thread: Code Error

  1. #1
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    Post Code Error

    l keep getting a code error when processing javac in the DOS command prompt using jdk-9. I can't find any syntax errors.
    The process stops with error listed after class Moonweight. Here is the code. Any ideas would be appreciated.
    I'm just learning from a library book.

    code = java

    /* A program to compute your effective weight on the moon.
    Program called "Moonweight.java".
    */

    class Moonweight {
    public static void main(String args[]) {
    double eweight; // weight in pounds on earth
    double mweight; // weight in pounds on the moon

    eweight = 230; // weight on earth
    mweight = eweight * .17; // calculate effective weight on moon

    System.out.println("weight on earth is" + eweight);
    System.out.println("weight on moon is" + mweight);
    }
    }
    /code

  2. #2
    Member John Joe's Avatar
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    Default Re: Code Error

    What is the error you getting ?
    Whatever you are, be a good one

  3. #3
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    Default Re: Code Error

    Quote Originally Posted by John Joe View Post
    What is the error you getting ?
    code = java (result of processing javac)

    class Moonweight {
    ^
    1 error


    code = java (result of processing java Moonweight.java)
    Moonweight.java is located under \bin the same as javac & java commands.

    /*Error: Could not find or load main class Moonweight.java
    Caused by: java.lang.ClassNotFoundException: Moonweight.java
    */
    Last edited by eng60; November 11th, 2017 at 12:47 PM. Reason: Additional information on error.

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    Default Re: Code Error

    I updated with additional error message.
    It is probably so simple...I just don't see it.
    Thanks for reviewing.

  5. #5
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    Default Re: Code Error

    Can you show us how you run your java class ? What command you used ?
    Whatever you are, be a good one

  6. #6
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    Default Re: Code Error

    At the DOS command prompt the directory is set for where the javac file and Moonweight.java file is located under \bin.
    I run javac Moonweight.java and get the 1 error message pointing to class Moonweight {.
    This was version jdk-9.

    Since then I have uninstalled Java version 9 and installed version 8. I will try again and see what the results will be.
    Thank you!

  7. #7
    Member John Joe's Avatar
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    Default Re: Code Error

    Don't forget to update here
    Whatever you are, be a good one

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