The second parameter for the CLASS or OBJECT keyword is invalid.
20
Cause . . . . . : The second parameter specified for the CLASS or OBJECT keyword must be a character constant. It must be the fully-qualified class name of the class that the object being defined or the method being prototyped belongs to. For example, 'java.lang.String' is the fully-qualified class name of the String class.
Recovery . . . : Correct the parameter. Compile again.