Which of the following satisfies the wildcard ? super Object?
A)JComponent
B)None satisfy this wildcard.
C)Scanner
D)String

Question

Quizplus · Accepted Answer

The wildcard ? super Object in Java generics means that the type must be Object or a superclass of Object. Since Object is the top of the class hierarchy in Java, no class can be a superclass of Object. Therefore, none of the provided options (A: JComponent, C: Scanner, D: String) satisfy this wildcard because they are all subclasses of Object, not superclasses or Object itself.

Which of the Following Satisfies the Wildcard ? Super Object