java

I was implementing a searching algorithm and I had to search for two things. In this article I describe how I implemented combining two Java optionals in Java 9 using Optional.or compared with Java 8

We performed a migration to Java 11 and a bug fix about negative symbol for negative numbers in Java ruined our implementation. This article describes the situation and the lessons learned.

We have experienced an issue with UTF-8 characters in Java and we have designed a unit test to prevent that to happen again.

Working with Mockito's ArgumentCaptor I discover it does not work as expected with child classes. This article describe a workaround to keep using it.

This post describe how I setup SNS to communicate with Firebase to send push notifications to Android and iOS devices

Playing around with JVM options, we question ourselves; what would happen if we set the minimum memory to be greater than the available memory?

Mocking external API with wiremock. Prepare a docker-compose bootstrap project for wiremock.