Answered: ween the following. ( Bounded wildcard…

Engineering

Computer Science

ween the following. ( Bounded wildcard - Lower bound

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Explain the differences between the following.
( Bounded wildcard - Lower bound wildcard - Unbound wildcard)

Expert Solution

Step 1

Bounded wildcard

A bounded wildcard has either an upper or lower inheritance constraint.A wildcard's bound can be a class type, interface type, array type, or type variable. The extends keyword is used to express upper bounds, and the super keyword is used to express lower bounds.

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