Spring boot + Spring Security 5 + OAuth2/OIDC Client - Basics,Since a long time I wanted to integrate an OpenID Connect provider using Spring Security, The last time I tried, I fel...

Java 8: Entenda facilmente funções lambda, a principal novidade!,A criação de Funções Lambda foi a principal novidade do Java 8, lançado em 2014! Hoje é praticamente obriga...

Configuring Logback with Spring Boot,Logback is provided out of the box with Spring Boot when you use one of the Spring Boot starter dependencies as they include spring-boot-starte...

Visitor Pattern in Java, When I find a concept difficult to understand I try to strip it to bare essentials. This happened to me recently with the visitor pattern so here is my tak...

Report about updating a Java project from JDK 8 to JDK 11,The Java version 8 has reached its end of life. Since January 2019 the free, commercial version doesn't receive updates an...

50+ Data Structure and Algorithms Problems from Coding Interviews,Disclosure: This post includes affiliate links; I may receive compensation if you purchase products or services fr...

Kotlin: Removing POJO Boilerplate,Kotlin is very quickly becoming one of my all-time favorite languages to play with. It is a JVM language that offers static typing, built-in null ...

Beefing Up Your Spring Security with Two-Factor Authentication,Two-factor authentication adds an extra layer of security to your web application by asking users to provide a second...

Java Stream Uses,Introduced in Java 8, the Java Stream API adds functional operations to collections, arrays, and other iterables. Streams are not collections or data structures, b...

Tracking Santa with SMS and Java,Since December of 2004, Google has provided an annual Christmas-themed site which allows users to track Santa during Christmas Eve. Additionally, N...

Record a Phone Message with Java, Introduction In a previous tutorial, we showed you how to Receive a Phone Call with Java and respond using text to speech. We can also allow users...

Creating a WebSocket Server with the Java API for WebSockets,WebSocket is a protocol which enables communication between the server and the browser. It has an advantage over RESTfu...