Results 1 to 5 of 5
  1. #1
    Join Date
    Oct 2011
    Posts
    3
    Rep Power
    0

    Unhappy ClassNotfoundException

    I'm a novice at programming and Java. So i really need the ABC of java! I've got jdk1.6.0_21 on my system and i use windows 7 OS. Trouble is i can't run any of the java programs that i write. I am able to compile but not run them. The programs are free of errors. All i get during runtime is a ClassNotFoundException. Would be glad if someone helps me with this! Thanks!

  2. #2
    JosAH's Avatar
    JosAH is online now Moderator
    Join Date
    Sep 2008
    Location
    Voorschoten, the Netherlands
    Posts
    14,043
    Blog Entries
    7
    Rep Power
    23

    Default Re: ClassNotfoundException

    Show us the very first line of your source code; I bet your class is stored in a package while you don't know how packages are handled by the JVM.

    kind regards,

    Jos
    The only person who got everything done by Friday was Robinson Crusoe.

  3. #3
    Join Date
    Oct 2011
    Posts
    3
    Rep Power
    0

    Default Re: ClassNotfoundException

    Jos, Its a simple hello world program! Just seven lines! :( Do you think I should set my path variables?

  4. #4
    Join Date
    Oct 2011
    Posts
    3
    Rep Power
    0

    Default Re: ClassNotfoundException

    This is what I get everytime I try to run a program on the console.


    D:\Program Files (x86)\Java\jdk1.6.0_21\bin>java ex
    Exception in thread "main" java.lang.NoClassDefFoundError: ex
    Caused by: java.lang.ClassNotFoundException: ex
    at java.net.URLClassLoader$1.run(URLClassLoader.java: 202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.j ava:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:3 07)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launche r.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:2 48)
    Could not find the main class: ex. Program will exit.

  5. #5
    JosAH's Avatar
    JosAH is online now Moderator
    Join Date
    Sep 2008
    Location
    Voorschoten, the Netherlands
    Posts
    14,043
    Blog Entries
    7
    Rep Power
    23

    Default Re: ClassNotfoundException

    Quote Originally Posted by shirleympearls View Post
    This is what I get everytime I try to run a program on the console.


    D:\Program Files (x86)\Java\jdk1.6.0_21\bin>java ex
    Exception in thread "main" java.lang.NoClassDefFoundError: ex
    Check if a file ex.class exists in the directory where you want to run it. (funny name "ex", I would've expected something like HelloWorld or similar).

    kind regards.

    Jos
    The only person who got everything done by Friday was Robinson Crusoe.

Similar Threads

  1. ClassNotFoundException...
    By providence in forum JDBC
    Replies: 2
    Last Post: 02-02-2011, 07:45 PM
  2. ClassnotFoundException
    By balaji shan in forum Java Servlet
    Replies: 8
    Last Post: 01-19-2011, 04:47 PM
  3. ClassNotFoundException
    By meprasobh in forum New To Java
    Replies: 2
    Last Post: 10-17-2010, 03:32 PM
  4. classNotFoundException
    By jyothi.priyanka in forum NetBeans
    Replies: 5
    Last Post: 08-24-2010, 10:13 AM
  5. ClassNotFoundException
    By oontvoo in forum Java Applets
    Replies: 7
    Last Post: 05-13-2010, 11:09 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •