more and more
Guide to the Volatile Keyword in Java 1. Overview In this quick article, we’ll focus on a foundational but often misunderstood concept in the Java language – the volatile keyword. In Java, each thread has a separate memory space known as working memory; this holds the values of different variables… Continue Reading java-volatile
getdocs
Guide to Classgraph Library 1. Overview In this brief tutorial, we’ll talk about the Classgraph library — what it helps with and how we can use it. Classgraph helps us to find target resources in the Java classpath, builds metadata about the resources found and provides convenient APIs for working… Continue Reading classgraph
getdocs
Guide To Java 8 Optional 1. Overview In this tutorial, we’re going to show the Optional class that was introduced in Java 8. The purpose of the class is to provide a type-level solution for representing optional values instead of null references. To get a deeper understanding of why we should care… Continue Reading java-optional
getdocs
How to Break from Java Stream forEach 1. Overview As Java developers, we often write code that iterates over a set of elements and performs an operation on each one. The Java 8 streams library and its forEach method allow us to write that code in a clean, declarative manner. While… Continue Reading java-break-stream-foreach
getdocs
Reversing a Binary Tree in Java 1. Overview Reversing a binary tree is one of the problems that we might be asked to solve during a technical interview. In this quick tutorial, we’ll see a couple of different ways of solving this problem. 2. Binary Tree A binary tree is… Continue Reading java-reversing-a-binary-tree
getdocs
Spring Cloud Tutorial Series Spring Cloud Building cloud-ready applications have its own set of challenges. This series explores these challenges and of course, guides you through a full microservice implementation using Spring Boot and Spring Cloud. Spring Cloud Basics * * * Spring Cloud Projects * * * * *… Continue Reading spring-cloud-tutorial
getdocs
Custom JUnit 4 Test Runners 1. Overview In this quick article, we’re going to focus on how to run JUnit tests using custom test runners. Simply put, in order to specify the custom runner, we’ll need to use the @RunWith annotation. 2. Preparation Let’s start by adding the standard JUnit… Continue Reading junit-4-custom-runners
getdocs
Supercharge Java Authentication with JSON Web Tokens (JWTs) Getting ready to build, or struggling with, secure authentication in your Java application? Unsure of the benefits of using tokens (and specifically JSON web tokens), or how they should be deployed? I’m excited to answer these questions, and more, for you in… Continue Reading java-json-web-tokens-jjwt
getdocs
SHA-256 and SHA3-256 Hashing in Java 1. Overview The SHA (Secure Hash Algorithm) is one of the popular cryptographic hash functions. A cryptographic hash can be used to make a signature for a text or a data file. In this tutorial, let’s have a look how we can perform SHA-256 and… Continue Reading sha-256-hashing-java
getdocs
Login For a Spring Web App – Error Handling and Localization 1. Overview In this article we’re going to illustrate how to implement a simple Login Page with Spring MVC for an application that’s handling the authentication with Spring Security in the backend. For the full details on how to… Continue Reading spring-security-login-error-handling-localization
getdocs