| Returns the class type that is a direct supertype of this one.
This is the superclass of this type's declaring class, with any
type arguments substituted in.
The only class with no superclass is java.lang.Object,
for which this method returns null.
For example, the class type extended by
java.util.TreeSet is
java.util.AbstractSet .
the class type that is a direct supertype of this one,or null if there is none |