ELI5: Why cast to an interface?,So, I am super new to OOP and Java--specifically, just finishing up my first semester of it. I understand interfaces are akin to contracts, and unde...

Avoid getters and setters whenever possible, Noooo!!! Don't click that generate getters and setters option!!! I like the rule: 'Don't use accessors and mutators.' Like any good rul...

On the subtleties of OOP,It is not a overstatement to say that I am an enthusiast when it comes to object orientation. A well crafted object oriented system is a piece of art. Howe...

Design Patterns: Strategy Pattern,originally posted on my blog at henricodesjava.blog Hello world! I'm currently reading Head First Design Patterns: A Brain-Friendly Guide, and i...

How do you choose between an interface and abstract class?,I have been asking this question in interviews for some years now. I get to hear a lot of interesting answers from folks....

Java is Unsound: The Industry Perspective,Recently Nada Amin and I discovered that Java and Scala are unsound. We submitted the finding and related discussion to OOPSLA, an academi...