How to solve java.lang.NoClassDefFoundError?

Question

I\'ve tried both the example in Oracle\'s Java Tutorials. They both compile fine, but at run-time, both come up with this error:

Exception in thread \"main\"         


        

Answer 1

In my environment, I encounter this issue in unit test. After appending one library dependency to *.pom, that's fixed.

e.g.:

error message:

java.lang.NoClassDefFoundError: com/abc/def/foo/xyz/Iottt

pom:

    com.abc.def
    foo
    test