Developers make assumptions about how our code will behave when executed, but we’re not always right. Without certainty, it is challenging to write programs that work correctly at runtime. Java ...

In the last three posts, we looked at a few different ways to walk a file tree. Let’s leave file walking behind, and look at a rarely used, but very useful feature of the Java language, namely ...

The Object Oriented paradigm is influenced by the design by contract principal, wherein, the creator and the consumer mutually agree to follow certain rules. The design by contract theory states that ...

Unlock the full InfoQ experience by logging in! Stay updated with your favorite authors and topics, engage with content, and download exclusive resources. Birgitta Böckeler, Distinguished Engineer at ...

A program can fail for just about any reason. Here are a few posibilities commonly covered in OCP: Your program tries to read a file that doesn't exist. Your program tries to access a database, but ...

AssertJ provides a rich and intuitive set of strongly-typed assertions to use for unit testing (with JUnit, TestNG or any other test framework). AssertJ's ambition is to provide a rich and intuitive ...

Marco Dahms has been working as a software architect for 18 years. His areas of expertise include clean code, continuous integration, cloud computing, distributed architectures, and Kubernetes. Unit ...