Most Java programmers are very familiar with the mechanism to extend a class. To do this, you simply create a new class and specify that it extends another class. You can then add funtionality not available in the original class, AND you can also override any functionality that existed already. Imagine a simple class public… Continue reading
Posts tagged object oriented programming
Using Java to work with Versioned Data
A few days ago I wrote about how to structure version details in MongoDB. In this and subsequent articles I’m going to present a Java based approach to working with that revision data. I have published all this work as an open source repository on github. Feel free to fork it: https://github.com/dwatrous/mongodb-revision-objects Design Decisions To… Continue reading
Refactoring to interfaces
The information below was delivered to one of my programmers as direction for how to implement a rather big change in an existing software product that I sell. I thought it was potentially useful to a broader audience, so I’m posting it here: …The rest of this is rather complicated to explain online. I’ll do… Continue reading
Java, Wicket and Hibernate on EC2 (pre-interview project)
Over the weekend I put together a project as a precursor to an interview. I really like interviews where I have a chance to solve a problem that’s more meaningful than generating a random number efficiently. The pre-interview question came in the form of a sketch of the application. This worked out great since I… Continue reading
Software licensing: The value of good books
I have a large budget for books (but thanks to Amazon it doesn’t have to be as big as it could be). Sure it’s true that most of the information in programming books is online and available for free. There may even be substance to the argument that most books are out of date as… Continue reading
Roadmap to Become an Expert Object Oriented Programmer
Programming has evolved in very significant ways over the last few decades. There have been some significant strides forward in terms of language structure, reduced complexity and programmer productivity. One of these shifts was from procedural style programming using a language like C to object oriented programming using a language like C++. Most modern languages… Continue reading