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Category Archives: Java

Model-Document-Renderer Design Pattern

Model-Document-Renderer is an evolution of Passive-View design pattern, suggested by Martin Fowler [1]. The difference is mainly in the terminology and in the suggested way of decomposing the application.

Case study on web frameworks

Goals The goal of this case-study is to make a short overview of the development tools for developing web-based business applications. The tools must (should) satisfy the following criteria:

Exercise on implementing collaborations with ObjectTeams/Java

Introduction ObjectTeams/Java (OT/J) is an extension to Java programming language that facilitates roles and collaborations as the first class language constructs. This article is an exercise on using (OT/J) for implementing collaborations. Subject area This exercise considers two bank operations – money transfer and fund cashing. The course of events for these two operations is […]

Using Java langauge constructs to define static graphs and trees

This article suggests an approach on adapting the Java programming language for defining static graphs and trees, gives an exercise on defining a microwave finite state automaton (FSA) using this approach and provides code sample for processing graph definitions

A convenient approach on keeping SQL in Java

Where to keep SQL statements? This question arises almost for any more-less sophisticated Java application that accesses DBMS. Two most common approaches are: (1) as string constants in Java and (2) as text in external files. Both these approaches have significant drawbacks. Java strings get complicated when a string is too long to fit in […]

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