Learn how to get a subarray of a given array in Java

Learn techniques for testing methods that call System.exit() when using JUnit.

Learn how to insert HashMap into MongoDB.

Learn how to convert a java.util.Date to a java.sql.Date.

Learn how to convert String to Instant with Java.

Explore the differences between Map and MultivaluedMap.

Explore the LinkedHashSet data structure from the Java Collections library.

Learn how to check if runnable objects are done.

Learn how to calculate the standard deviation in Java.

Java thread deprecations, JPA locking, JVM logging, pattern matching, consistent caching at scale, and event sourcing!

Learn three approaches to get a List object that contains all instances of an enum

Learn how to find the maximal date in a list of objects using Streams.

Explore four approaches for removing all non-numeric characters from a Java String while keeping the decimal separator.

One very handy Data Structure when it comes to Redis is the GeoHash Data structure. Essentially it is a sorted set that generates a score based on the

Over the years, I’ve been writing a lot in English, which isn’t my mother tongue, and for writing titles (headlines, article titles, etc.) I always have

1. Introduction The last post presented the fundamental concepts of the reactive approach, including a specification and

If your application contains multiple services interacting with each other the need for distributed tracing is increasing. You have a call towards one

The new JEP 434 has just seen daylight and describes the second preview of the ”Foreign Function & Memory API” (or FFM for short) which is going to be

Panama improvements, fast Java startup in AWS lambda, Spring Boot error handling, TSID vs UUID, and dependency inversion!

Learn alternatives to the traditional instanceof approach to improve code design and readability.

A detailed explanation about generics, how and when to use type parameters, and when wildcards are more appropiate.