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Agile Java¿: Crafting Code with Test-Driven Development, Portable Documents

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Agile Java¿: Crafting Code with Test-Driven Development, Portable Documents

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  • Published Feb 14, 2005 by Pearson.

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  • Copyright 2005
  • Dimensions: 7" x 9-1/4"
  • Edition: 1st
  • eBook (Watermarked)
  • ISBN-10: 0-13-246614-7
  • ISBN-13: 978-0-13-246614-1

Master Java 5.0 and TDD Together: Build More Robust, Professional Software

Master Java 5.0, object-oriented design, and Test-Driven Development (TDD) by learning them together. Agile Java weaves all three into a single coherent approach to building professional, robust software systems. Jeff Langr shows exactly how Java and TDD integrate throughout the entire development lifecycle, helping you leverage today's fastest, most efficient development techniques from the very outset.

Langr writes for every programmer, even those with little or no experience with Java, object-oriented development, or agile methods. He shows how to translate oral requirements into practical tests, and then how to use those tests to create reliable, high-performance Java code that solves real problems. Agile Java doesn't just teach the core features of the Java language: it presents coded test examples for each of them. This TDD-centered approach doesn't just lead to better code: it provides powerful feedback that will help you learn Java far more rapidly. The use of TDD as a learning mechanism is a landmark departure from conventional teaching techniques.

  • Presents an expert overview of TDD and agile programming techniques from the Java developer's perspective
  • Brings together practical best practices for Java, TDD, and OO design
  • Walks through setting up Java 5.0 and writing your first program
  • Covers all the basics, including strings, packages, and more
  • Simplifies object-oriented concepts, including classes, interfaces, polymorphism, and inheritance
  • Contains detailed chapters on exceptions and logging, math, I/O, reflection, multithreading, and Swing
  • Offers seamlessly-integrated explanations of Java 5.0's key innovations, from generics to annotations
  • Shows how TDD impacts system design, and vice versa
  • Complements any agile or traditional methodology, including Extreme Programming (XP)

Sample Content

Sample Pages

Download the sample pages (includes Chapter 3 and Index)

Table of Contents

About the Author.




    Who Is This Book For?

    What This Book Is Not

    How to Use This Book


    Conventions Used in This Book

An Agile Overview.

    What Is “Agile?”

    What Is Java?

    Why OO?

    What Is an Object?

    What Are Classes?

    Why UML?

    What Is Inheritance?

    Why Test-Driven Development?

Setting Up.

    Software You’ll Need

    Does It Work?

    Compiling Hello World

    Executing Hello World

    Still Stuck?

Lesson 1: Getting Started.



    A Simple Test


    Adding a Test

    Creating a Student

    Creating the Student Class


    Local Variables

    Returning a Value from a Method


    Instance Variables

    Summarizing the Test




    Naming Conventions



Lesson 2: Java Basics.


    Enrolling Students



    Default Constructors


    The SDK and java.util.ArrayList

    Adding Objects

    Incremental Refactoring

    Objects in Memory

    Packages and the import Statement

    The java.lang Package

    The Default Package and the package Statement

    The setup Method

    More Refactoring

    Class Constants


    Overload Constructors

    Deprecation Warnings


    Creating Dates with Calendar


    Javadoc Comments


Lesson 3: Strings and Packages.

    Characters and Strings



    System Properties

    Looping Through All Students

    Single-Responsibility Principle



    Using System.out


    Package Structure

    Access Modifiers

    Using Ant


Lesson 4: Class Methods and Fields.

    Class Methods

    Class Variables

    Operating on Class Variables with Class Methods

    Static Import


    Factory Methods

    Simple Design

    Static Dangers

    Using Statics: Various Notes

    Jeff’s Rule of Statics


    Tests as Documentation

    More on Initialization


    Revisiting Primitive-Type Field Initialization


Lesson 5: Interfaces and Polymorphism.

    Sorting: Preparation

    Sorting: Collections.sort



    Why Interfaces

    Implementing Comparable

    Sorting on Department and Number

    The if Statement

    Grading Students

    Floating-Point Numbers

    Testing Grades




    Using Interface References

    ArrayList and the List Interface


Lesson 6: Inheritance.

    The switch Statement

    Case Labels Are Just Labels



    Abstract Classes

    Extending Methods


    Enhancing the Grade Enum

    Summer Course Sessions

    Calling Superclass Constructors


    More on Constructors

    Inheritance and Polymorphism

    The Principle of Subcontracting


Lesson 7: Legacy Elements.

    Looping Constructs

    Breaking Up a Student’s Name

    The while Loop

    Comparing Java Loops


    Looping Control Statements

    The Ternary Operator

    Legacy Collections


    Iterators and the for-each Loop


    Wrapper Classes




Lesson 8: Exceptions and Logging.


    Dealing With Exceptions

    Checked Exceptions

    Exception Hierarchy

    Creating Your Own Exception Type

    Checked Exceptions vs. Unchecked Exceptions


    Catching Multiple Exceptions

    Rethrowing Exceptions

    Stack Traces

    The finally Block



    Logging in Java

    Testing Logging

    Logging to Files

    Testing Philosophy for Logging

    More on FileHandler

    Logging Levels

    Logging Hierarchies

    Additional Notes on Logging


Lesson 9: Maps and Equality.

    Logical Operators


    Hash Tables


    Refactoring Session


    The Contract for Equality

    Apples and Oranges

    Collections and Equality

    Hash Tables


    An Ideal Hash Algorithm

    A Final Note on hashCode

    More on Using HashMaps

    Additional Hash Tables and Set Implementations


    Strings and Equality


Lesson 10: Mathematics.


    More on Primitive Numerics

    Integer Math

    Numeric Casting

    Expression Evaluation Order



    Numeric Overflow

    Bit Manipulation


    Numeric Wrapper Classes

    Random Numbers


Lesson 11: IO.


    Character Streams

    Writing to a File


    Byte Streams and Conversion

    A Student User Interface

    Testing the Application

    Data Streams


    Advanced Streams

    Object Streams

    Random Access Files

    The Student Directory


    Static Nested Classes and Inner Classes







    Developing the Solution


Lesson 12: Reflection and Other Advanced Topics.

    Mock Objects Revisited

    The Jim Bob ACH Interface

    The Mock Class

    The Account Class Implementation

    Anonymous Inner Classes


    Accessing Variables from the Enclosing Class



    Using JUnit Code

    The Class Class

    Building the Suite

    Class Modifiers

    Dynamic Proxy

    A Secure Account Class

    Building the Secure Account Solution

    The SecureProxy Class

    Problems With Reflection


Lesson 13: Mulithreading.


    Search Server

    The Search Class

    Less Dependent Testing

    The Server

    Waiting in the Test

    Creating and Running Threads

    Cooperative and Preemptive Multitasking


    Creating Threads with Runnable


    Synchronized Collections


    Stopping Threads


    Additional Notes on wait and notify

    Locks and Conditions

    Thread Priorities



    The Timer Class

    Thread Miscellany

    Summary: Basic Design Principles for Synchronization


Lesson 14: Generics.

    Parameterized Types

    Collection Framework

    Multiple Type Parameters

    Creating Parameterized Types


    Upper Bounds


    Implications of Using Wildcards

    Generic Methods

    Wildcard Capture


    Additional Bounds

    Raw Types

    Checked Collections


    Additional Limitations


    Final Notes


Lesson 15: Assertions and Annotations.


    The assert Statement vs. JUnit Assert Methods


    Building a Testing Tool



    The @TestMethod Annotation


    Annotation Targets

    Skipping Test Methods

    Modifying TestRunner

    Single-Value Annotations

    A TestRunner User Interface Class

    Array Parameters

    Multiple Parameter Annotations

    Default Values

    Additional Return Types and Complex Annotation Types

    Package Annotations

    Compatibility Considerations

    Additional Notes on Annotations



Additional Lesson I: Swing, Part 1.


    Getting Started

    Swing Application Design



    More Widgets


    Button Clicks and ActionListeners

    List Models

    The Application



    Moving Forward

Additional Lesson II: Swing, Part 2.

    Miscellaneous Aesthetics





    Remaining Tasks

    Final Notes

Additional Lesson III: Java Miscellany.


    Regular Expressions

    Cloning and Covariance



    Call by Reference versus Call by Value

    Java Periphery

    What Else Is There?

Appendix A: An Agile Java Glossary.

Appendix B: Java Operator Precedence Rules.

Appendix C: Getting Started with IDEA.


    The Hello Project

    Running Tests

    Taking Advantage of IDEA

Agile Java References.



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