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    Expert tip

    Look if your classpath is correct, and check if the versions of your libraries match the version you described in your pom.xml

Solutions on the web

via Coderanch by Riley Thomas, 1 year ago
HelloWorld (wrong name: hello/HelloWorld)
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HelloWorld (wrong name: org/HelloWorld)
via Oracle Community by 807597, 1 year ago
HelloWorld (wrong name: StudyPackage/HelloWorld)
via Coderanch by Vinnie Jenks, 1 year ago
HelloWorld (wrong name: com/scientifik/SampleCLI/HelloWorld)
via Coderanch by Alex George, 1 year ago
HelloWorld (wrong name: com/mypackage/HelloWorld)
via Google Groups by R.A.M., 2 years ago
Main (wrong name: helloworld/Main)
java.lang.NoClassDefFoundError: HelloWorld (wrong name: hello/HelloWorld)	at java.lang.ClassLoader.defineClass1(Native Method)	at java.lang.ClassLoader.defineClass(ClassLoader.java:620)	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)	at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)	at java.net.URLClassLoader.access$100(URLClassLoader.java:56)	at java.net.URLClassLoader$1.run(URLClassLoader.java:195)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)