open class NoClassDefFoundError : LinkageError
Thrown if the Java Virtual Machine or a
ClassLoader instance tries to load in the definition of a class (as part of a normal method call or as part of creating a new instance using the
new expression) and no definition of the class could be found.
The searched-for class definition existed when the currently executing class was compiled, but the definition can no longer be found.
NoClassDefFoundError with no detail message.