Reflection - The Java Programming Language - page 598

public boolean isPrimitive()
Returns true if this Class object is one of the Class objects rep-
resenting the eight primitive types or void .
public boolean isSynthetic()
Returns TRue if this Class object represents a synthetic type
introduced by the compiler. A synthetic program element is
anything for which there does not exist a corresponding con-
struct in the source code.
public int getModifiers()
Returns the modifiers for the type, encoded as an integer. The
value should be decoded using the constants and methods of
class Modifier ; see Section 16.3 on page 416 . Type modifi-
ers include the access modifiers ( public , protected , private ) as
well as abstract , final , and static . For convenience, whether
a type is an interface is also encoded as a modifier. Primit-
ive types are always public and final . Array types are always
final and have the same access modifier as their component
type. In this context, an annotation is not considered a mod-
ifier because this encoding scheme pre-dates the addition of
annotations to the language.
You can also ask whether you have a top-level type or a nested type,
and if nested, some information about which kind of nested type:
public boolean isMemberClass()
Returns true if this Class object represents a type that is a
member of another typethat is, it is a nested type. If this
method returns false , then you have a top-level type. Despite
the name, this method applies to nested interfaces, as well as
nested classes.