Spring Boot & Databases: Stop Struggling, Start Connecting! Master the art of connecting your Spring Boot app to popular databases

Want to write unit tests that are crystal clear and a breeze to maintain? Unleash the power of AssertJ! This guide explores tips and tricks!

Java Add Elements Collection: Efficiently add elements to collections in Java with ListIterator, enhanced loops, and Java 8 Stream API.

Interested to learn more about openapi generator custom templates? Then check out our detailed example on OpenAPI Generator Custom Templates!

1. Introduction Spring Security AuthorizationManager is part of Spring Security that is an extension of the Spring Framework that supports common

Learn efficient "Simplified Array Operations on JsonNode in Jackson" for streamlined JSON handling in Java. Discover techniques to work with JSON arrays seamlessly using Jackson's JsonNode abstraction without the need for typecasting.

Explore several approaches to removing all characters before a specified character in a string.

Learn how to convert a two-dimensional array into a one-dimensional, which is commonly known as flattening.

Learn how to find the index of the smallest element in an array.

Apache Commons Configuration can be used to allow us to specify configuration parameters to be loaded at runtime by our application. We look at a few use cases and types of configuration files.

Learn everything you need to know about java.security.UnrecoverableKeyException - what causes it and how to fix it.

Learn how to convert from an int primitive to a short primitive in Java.

Learn how to get the 2’s complement of a number in Java.

Learn how to create a HashMap with a string's character count.

Learn how to handle nulls in ArrayList.addAll().

Learn how to use Comparators with PriorityQueues and how to change the sorting order in such queues.

Learn how to use the Google Guava's ClassToInstanceMap interface and its implementations.

A quick reference guide for changes that appeared in common.util.concurrent package.

A short introduction to Guava's CacheLoader and its usage.

A quick and practical guide to the Bloom filter, a probabilistic data structure, and how to use its implementation in the Guava library.