java.lang.NoClassDefFoundError

Demo.SendMailDemo

Samebug tips9

This error means there's a class missing in your classpath during runtime. You need to create a jar with all your dependencies and have it in your classpath. Check Maven Assembly Plugin and how to add your dependencies to a jar: https://goo.gl/U2zr8k

I had to build one fat jar that will include all dependencies from the other jars that i wanted to use.

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Solutions on the web1

  • via Coderanch by Joel Bijapurkar, 9 months ago
    Demo.SendMailDemo
  • Stack trace

    • java.lang.NoClassDefFoundError: Demo.SendMailDemo at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source) Caused by: java.lang.ClassNotFoundException: Demo.SendMailDemo at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 1 more

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