Bug Patterns in Java presents a methodology for diagnosing and debugging computer programs. The act of debugging will be presented as an ideal application of the scientific method. Skill in this area is entirely independent of other programming skills, such as designing for extensibility and reuse. Nevertheless, it is seldom taught explicitly. Eric Allen lays out a theory of debugging, and how it relates to the rest of the development cycle. In particular, he stresses the critical role of unit testing in effective debugging. At the same time, he argues that testing and debugging, while often conflated, are properly considered to be distinct tasks. Upon laying this groundwork, Allen then discusses various "bug patterns" (recurring relationships between signaled errors and underlying bugs in a program) that occur frequently in computer programs. For each pattern, the book discusses how to identify them, how to treat them, and how to prevent them. Table of Contents Agile Methods in a Chaotic Environment Bugs, Specifications, and Implementations Debugging and the Development Process Debugging and the Testing Process The Scientific Method of Debugging About the Bug Patterns The Rogue Tile Null Pointers Everywhere! The Dangling Composite The Null Flag The Double Descent The Liar View Saboteur Data The Broken Dispatch The Impostor Type The Split Cleaner The Fictitious Implementation The Orphaned Thread The Run-On Initialization Platform-Dependent Patterns A Diagnostic Checklist Design Patterns for Debugging References

"This is the best book on patterns since the Gang of Four's DesignPatterns. The book manages to be a resource for three of the mostimportant trends in professional programming: Patterns, Java, andUML." —Larry O'Brien, Founding Editor, Software DevelopmentMagazine Since the release of Design Patterns in 1994, patterns havebecome one of the most important new technologies contributing tosoftware design and development. In this volume Mark Grand presents41 design patterns that help you create more elegant and reusabledesigns. He revisits the 23 "Gang of Four" design patterns from theperspective of a Java programmer and introduces many new patternsspecifically for Java. Each pattern comes with the complete Javasource code and is diagrammed using UML. Patterns in Java, Volume 1 gives you: 11 Behavioral Patterns, 9 Structural Patterns, 7 ConcurrencyPatterns, 6 Creational Patterns, 5 Fundamental Design Patterns, and3 Partitioning Patterns Real-world case studies that illustrate when and how to use thepatterns Introduction to UML with examples that demonstrate how toexpress patterns using UML The CD-ROM contains: Java source code for the 41 design patterns Trial versions of Together/J Whiteboard Edition from ObjectInternational (www.togetherj.com); Rational Rose 98 from RationalSoftware (www.rational.com); System Architect from Popkin Software(www.popkin.com); and OptimizeIt from Intuitive Systems, Inc.

It is a pleasure to present the proceedings of the 22nd European Conference on Object-Oriented Programming (ECOOP 2008) held in Paphos, Cyprus. The conference continues to serve a broad object-oriented community with a tech- cal program spanning theory and practice and a healthy mix of industrial and academic participants. This year a strong workshop and tutorial program c- plementedthemaintechnicaltrack.Wehad13workshopsand8tutorials,aswell as the co-located Dynamic Language Symposium (DLS). Finally, the program was rounded out with a keynote by Rachid Guerraoui and a banquet speech by James Noble. As in previous years, two Dahl-Nygaard awards were selected by AITO, and for the ?rst time, the ECOOP Program Committee gave a best paper award. Theproceedingsinclude27papersselectedfrom138submissions.Thepapers werereviewed in a single-blind process with three to ?ve reviews per paper. P- liminaryversionsofthereviewsweremadeavailabletotheauthorsaweekbefore the PC meeting to allow for short (500 words or less) author responses. The - sponses were discussed at the PC meeting and were instrumental in reaching decisions. The PC discussions followed Oscar Nierstrasz’Champion pattern. PC papers had ?ve reviews and were held at a higher standard.

The biggest challenge facing many game programmers is completing their game. Most game projects fizzle out, overwhelmed by the complexity of their own code. Game Programming Patterns tackles that exact problem. Based on years of experience in shipped AAA titles, this book collects proven patterns to untangle and optimize your game, organized as independent recipes so you can pick just the patterns you need. You will learn how to write a robust game loop, how to organize your entities using components, and take advantage of the CPUs cache to improve your performance. You'll dive deep into how scripting engines encode behavior, how quadtrees and other spatial partitions optimize your engine, and how other classic design patterns can be used in games.

This two-volume set (CCIS 848 and CCIS 849) constitutes the thoroughly refereed proceedings of the 5th International Conference Geo-Spatial Knowledge and Intelligence, GSKI 2017, held in Chiang Mai, Thailand, in December 2018.The 142 full papers presented were carefully reviewed and selected from 579 submissions. They are organized in topical sections on smart city in resource management and sustainable ecosystem; spatial data acquisition through RS and GIS in resource management and sustainable ecosystem; ecological and environmental data processing and management; advanced geospatial model and analysis for understanding ecological and environmental process; applications of geo-informatics in resource management and sustainable ecosystem.