Book Image

Learning Jakarta Struts 1.2: a concise and practical tutorial

By : Stephan Wiesner
Book Image

Learning Jakarta Struts 1.2: a concise and practical tutorial

By: Stephan Wiesner

Overview of this book

<p>Jakarta Struts is an Open Source Java framework for developing web applications. By cleanly separating logic and presentation, Struts makes applications more manageable and maintainable.<br />Since its donation to the Apache Foundation&nbsp; in 2001, Struts has been rapidly accepted as the leading Java web application framework, and community support and development is well established.<br /><br />Struts-based web sites are built from the ground up to be easily modifiable and maintainable, and internationalization and flexibility of design are deeply rooted. Struts uses the Model-View-Controller design pattern to enforce a strict separation between processing logic and presentation logic, and enables efficient object re-use.<br /><br />The book is written as a structured tutorial, with each chapter building on the last. The book begins by introducing the architecture of a Struts application in terms of the Model-View-Controller pattern. Having explained how to install Jakarta and Struts, the book then goes straight into an initial implementation of the book store. The well structured code of the book store application is explained and related simply to the architectural issues.<br /><br />Custom Actions, internationalization and the possibilities offered by Taglibs are covered early to illustrate the power and flexibility inherent in the framework. The bookstore application is then enhanced in functionality and quality through the addition of logging and configuration data, and well-crafted forms. At each stage of enhancement, the design issues are laid out succinctly, then the practical implementation explained clearly. This combination of theory and practical example lays a solid understanding of both the principles and the practice of building Struts applications.</p>
Table of Contents (20 chapters)
Learning Jakarta Struts 1.2
Credits
Preface
About the Book
Glossary
Literature

Chapter 7: Logic


Exercise 1

2. Why is the Book.compareTo() method (Listing 7.5) not declared using public int compareTo(Book foreignBook)? If you were to declare it this way, could you leave out the conditional for testing the Book object?

Yes, of course, you can do this, but the significance of this method is to overwrite the standard method for comparing. Please take a look at the Quotation at the beginning of the chapter once again.

3. Find a book or web site about sorting algorithms and write a Java console application to test and compare Bubblesort, for example, with Shellsort, for large numbers of objects, say 10 million.

It is important to think about extreme cases. The Quicksort is faster than Bubblesort in most cases. But in some cases, it not only requires more space, but also more time.

Go over the API for class java.util.Arrays. The Quicksort is used here for sorting.