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Thread: Hey Guys, first time seeing this kind of error? -

  1. January 23rd, 2013, 03:16 PM #1
    javapol
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    Default Hey Guys, first time seeing this kind of error? -

    Please help

    Exception in thread "main" java.lang.ClassNotFoundException: MyCard
    at java.net.URLClassLoader$1.run(URLClassLoader.java: 366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java: 355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.j ava:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:4 23)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launche r.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:3 56)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:186)
    at com.intellij.rt.execution.application.AppMain.main (AppMain.java:113)
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  3. January 23rd, 2013, 03:22 PM #2
    Norm
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    Default Re: Hey Guys, first time seeing this kind of error? -

    The jvm could not find a definition for the MyCard class on the classpath when it tried to execute the statement at line 113.

    Where is the definition for the MyCard class? Is the MyCard.class file in a folder on the classpath?
    If you don't understand my answer, don't ignore it, ask a question.
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  4. January 23rd, 2013, 03:31 PM #3
    javapol
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    Default Re: Hey Guys, first time seeing this kind of error? -

    This appeared when I tried to call the method MyCard by typing MyCard gui = new MyCard(); into the main, I am following school notes.
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  5. January 23rd, 2013, 03:45 PM #4
    Norm
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    Default Re: Hey Guys, first time seeing this kind of error? -

    You need to provide the java program with a MyCard.class file with the definition of the MyCard class to be able to execute the code.

    Where is the definition of the class: MyCard that was used when you compiled the program?
    If you don't understand my answer, don't ignore it, ask a question.
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  6. January 23rd, 2013, 03:51 PM #5
    javapol
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    Default Re: Hey Guys, first time seeing this kind of error? -

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  7. January 23rd, 2013, 03:52 PM #6
    Norm
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    Default Re: Hey Guys, first time seeing this kind of error? -

    Sorry I have no idea what that image's contents means.
    It's mostly unreadable.

    If you are having troubles with your IDE, try asking about it in the IDE section:
    http://www.javaprogrammingforums.com/java-ides/

    EDIT: The trouble I was talking about was setting the IDE's classpath so the java program could find the class definition.
    Last edited by Norm; January 24th, 2013 at 11:39 AM. Reason: Added comment re classpath
    If you don't understand my answer, don't ignore it, ask a question.
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  8. January 23rd, 2013, 04:07 PM #7
    javapol
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    Default Re: Hey Guys, first time seeing this kind of error? -

    Its a print screen from intellij, could you please have a look by zooming in (Ctrl and +)
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  9. January 23rd, 2013, 04:33 PM #8
    Norm
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    Default Re: Hey Guys, first time seeing this kind of error? -

    Sorry, I don't know how to read what your IDE shows.

    If there are error messages, copy them and paste them here.
    If you don't understand my answer, don't ignore it, ask a question.
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