Exception in thread “main” java.lang.NoClassDefFoundError: HelloWorld

Question

I\'ve been working on this for about an hour and thumbing through Q&As on stackoverflow but I haven\'t found a proposed solution to my problem. I\'m sorry if this is a d

Answer 1

As a beginner you might encounter a very similar scenario where the error output is the same. You try to compile and run your simple program(without having any package set) and you do this:

javac HelloWorld.java
java HelloWorld.class

This will give you the same java.lang.NoClassDefFoundError since java thinks HelloWorld is your package and class your class name. To solve it just use

javac HelloWorld.java
java HelloWorld

See the Java page - Lesson: Common Problems (and Their Solutions)