We have proposed a programming education support tool pgtracer for effective programming education. Pgtracer utilizes source codes and trace tables that represent execution results of the source code ...

some crashes reported in our prod app, tried to reproduce it but not able to, also these crashes are not consistent in behaviour. Fatal Exception: java.lang.NullPointerException: Attempt to invoke ...

What is the contract between equals() and hashcode()? Learn how these methods work together when comparing objects in Java.

Copying objects is a common Java programming operation that has one serious trap. Here's how to avoid copying from an object reference and only copy the instance and values you want.

The types involved are the usual suspects: number, text, date, boolean and special cases Java objects. From what I understand, H2 v2 is not suitable for the dynamic databases we create anymore because ...

Converting JSON Objects to Relational Tables, Part 2: Creating Related Tables SQL Server's OpenJson function will let you dismantle JSON structures into relational tables, including tables with ...