This book constitutes the thoroughly refereed post-proceedings of the international conference NetObjectDays 2002, held in Erfurt, Germany, in October 2002.The 26 revised full papers presented were carefully selected during two rounds of reviewing and revision.

Keynotes.- AspectJ(tm): Aspect-Oriented Programming in Java.- Agile Processes and Modeling.- Eclipse - An Open Source Platform for the Next Generation of Development Tools.- Regular Papers.- A Framework for Resource Management in Peer-to-Peer Networks.- A Lightweight Communication Infrastructure for Spontaneously Networked Devices with Limited Resources.- Serialization of Distributed Execution-State in Java.- Specification of Business Components.- Graph Rewrite Systems for Software Design Transformations.- Lightweight Plug-In-Based Application Development.- Supporting Component-Based Software Evolution.- Java Smart Ticket Demo Application Scrutinized.- Java Class Deployment Using Class Collections.- Do We Need Components for Persistent Data Storage in the Java 2 Enterprise Environment?.- Consistency Checking of Financial Derivatives Transactions.- Toolkits for Generating Wrappers.- Developing a Generic Concept of an Electronic Negotiation Process with ebXML.- AspectS - Aspect-Oriented Programming with Squeak.- Relational Database Support for Aspect-Oriented Programming.- Object Teams: Improving Modularity for Crosscutting Collaborations.- Ubiquitous Healthcare: The OnkoNet Mobile Agents Architecture.- Extending Activity Diagrams to Model Mobile Systems.- A Concrete Method for Developing and Applying Product Line Architectures.- Generic Implementation of Product Line Components.- Qualifying Types Illustrated by Synchronisation Examples.- Advanced Thread Synchronization in Java Using Interaction Expressions.- Refactoring Browser for UML.- Test-Driven Web Application Development in Java.- UML-Based Statistical Test Case Generation.- Do We Need ‘Agile’ Software Development Tools?.