A review on Java performance for many objects using Java Collections or alternative collections, with the impact of serial vs. parallel streams. For some streaming data sets, parallel processing can be slower than the default. (more…)

The release of Java SE 15 in Sept 2020 will introduce "sealed classes" (JEP 360) as a preview feature. A sealed class is a class or interface which restricts which other classes or interfaces may extend it. Sealed classes, like enums, capture alternative... (more…)

This architecture principle was created by [1] Alistair Cockburn in 2005. This is one of the many forms of DDD(Domain Driven Design Architecture). The goal was to find a way to solve or otherwise… (more…)

Introduction A high-performance data access layer requires a lot of knowledge about database internals, JDBC, JPA, Hibernate, and this post summarizes some of the most important techniques you can use to optimize your enterprise application. 1. SQL statem... (more…)

To be able to show you what Property-based testing (PBT) is, let’s start by grasping the concept of a property in programming languages. Since this is a Java tutorial, I will start with Oracl… (more…)