question: public static Class < ? > invocationHandlerReturnType ( Class < ? > type ) { if ( type == byte . class ) return Byte . class ; if ( type == char . class ) return Character . class ; if ( type == double . class ) return Double . class ; if ( type == float . class ) return Float . class ; if ( type == int . class ) return Integer . class ; if ( type == long . class ) return Long . class ; if ( type == short . class ) return Short . class ; if ( type == boolean . class ) return Boolean . class ; return type ; }
target:  Returns the type that must be returned by the invocation handler of a dynamic proxy in order to have the dynamic proxy return the specified type (which is assumed to be a legal member type for an annotation).