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Thread: Not finding main class

  1. #1
    Junior Member
    Join Date
    Mar 2012
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    Default Not finding main class

    My application executes smoothly when I Run the project from Netbeans. After a Clean & Build I tried:

    java -jar "/home/eus/NetBeansProjects/HimaraTest/dist/HimaraTest.jar"

    and strangely it gives me the following error:
    Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/poi/ss/usermodel/Sheet
    Caused by: java.lang.ClassNotFoundException: org.apache.poi.ss.usermodel.Sheet
            at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
            at java.security.AccessController.doPrivileged(Native Method)
            at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
            at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
    Could not find the main class: himaratest.NewJFrame4. Program will exit.

    Someone can tell me why? What is wrong with the app?

  2. #2
    Super Moderator Norm's Avatar
    Join Date
    May 2010
    Eastern Florida
    Thanked 2,420 Times in 2,373 Posts

    Default Re: Not finding main class

    ClassNotFoundException: org.apache.poi.ss.usermodel.Sheet
    The java program could NOT find the class that is mentioned in the error message. You probably need to include the jar file that contains that class in the classpath. Your IDE should have a way to add the Class-Path: entry to the manifest file in the jar file and have it point to the jar file with the missing class.

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