Java: NoClassDefFoundError using Apache Commons CLI 1.2
apache-commons-cli, exception, java, noclassdeffounderror
Solution
Commons CLI is not in the classpath at runtime. If you struggle to get the classpath right you can try to package your application as a single big jar file containing all its dependencies, including Commons CLI. There are many tools to achieve that (jarjar, onejar, Maven shade plugin...)
Problem
I am using the Apache Commons CLI 1.2 to parse command line arguments in Java. I had run into the `NoClassDefFoundError` when trying to run my java class but solved it by fixing the class-paths. Now I have the same exception but in regards to the actual `commons-cli` classes as is shown below: ``` Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/cl i/CommandLineParser Caused by: java.lang.ClassNotFoundException: org.apache.commons.cli.CommandLineP arser 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) Could not find the main class: com.amirsys.score.api.script.CMDContentPusher. ``` The only thing I could think of is to set the class path to the commons-cli jar but that did not work. I haven't been able to find a solution to fixing the `NoClassDefFoundError` for imported classes. I thought these were compiled into the .class files?