Given the following generic method, which of the following CANNOT be the return type?
Public static <E extends Comparable> E max(E[] a) { . . .}
I String
II Integer
III double

Question

Given the following generic method, which of the following CANNOT be the return type?
Public static <E extends Comparable> E max(E[] a) { . . .}
I String
II Integer
III double
A) I
B) II
C) III
D) I and III

Quizplus · Accepted Answer

Since the generic type parameter E is bounded by implementing the Comparable interface, the return type must also implement Comparable. Therefore, primitives like double cannot be used as the return type since they do not implement the Comparable interface. Options I and II are valid choices as String and Integer both implement Comparable.

Given the Following Generic Method, Which of the Following CANNOT