November 2013
Beginner to intermediate
236 pages
4h 6m
English
Content preview from A Concise Introduction to Data Structures using JavaBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 4
Generic Stacks
The previous chapter built an interface and two implementations for an integer stack. Suppose now that we need a stack to hold strings. (We are about to need one, in fact, in Section 4.4.) With copy-paste and some careful editing, we could create a StringStack interface and two corresponding string implementations. But then what if we need a stack to hold some other type? You can see the problem: continuing to write new classes and interfaces for every element type creates a lot of code that is essentially the same. What we need is a type variable, so that each time we make a new stack, we can specify the type that will be stored in it. This is known as generic programming.
4.1 Generic Types
Type Parameters
A generic ...
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