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Stacks and Queues

This chapter introduces two important interfaces, Stack and Queue. Each corresponds to a data structure holding a collection of objects, ordered by when they were inserted into the structure. A stack gives us access to only the newest (most recently inserted) object, whereas a queue gives us access to only the oldest object.

Section 4.1 introduces the Stack interface. We discuss how a stack behaves, putting off the implementation until later chapters. Generic classes, new to Java 1.5, are introduced in this section. We use stacks in the solitaire card game Idiot's Delight. Section 4.2 explores another important stack application: the call stack, which Java uses to keep track of all of the methods running at a given time. Knowing about the call stack helps us to understand many other principles and Java features, such as exceptions. Exceptions, introduced in Section 4.3, provide a way to recover gracefully from errors. Section 4.4 discusses the Queue interface and uses it in the game of War.


The Stack Interface

Part I: Object-Oriented Programming

Encapsulation

Polymorphism

Inheritance

Part II: Linear Structures

Stacks and Queues

Array-Based Structures

Linked Structures

Part III: Algorithms

Analysis of Algorithms

Searching and Sorting

Recursion

Part IV: Trees and Sets

Trees

Sets

Part V: Advanced Topics

Advanced Linear Structures

Strings

Advanced Trees

Graphs

Memory Management

Out to the Disk

Part VI: Appendices

A. Review of Java

B. Unified Modeling Language

C. Summation Formulae

D. Further Reading

Index

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Data Structures and Algorithms in Java
Data Structures and Algorithms in Java
ISBN: 0131469142
EAN: 2147483647
Year: 2004
Pages: 216
Authors: Peter Drake
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