Learn how to use Filters builders to perform filter operations on a MongoDB collection.

Learn a few ways to write unit tests for singletons using Mockito.

Learn how to restrict the total memory usage in Java.

Learn how to handle exceptions in our routes using Apache Camel.

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