Introduction to the Keytool utility The keytool utility is a command-line tool included with the Java Development Kit (JDK) that allows users to manage the keystore that contains their keys and certificates. The keystore is a repository of security certificates, either generated by the keytool or imported from other sources, that can be used to … Read more
Overview In this post, I will show you how you can quickly test the email-sending function of your application using MailHog. The application I’m demonstrating is a Spring Boot web app. However, you can use the code in almost all applications. Let’s get started. Setup MailHog MailHog is a fantastic tool for developers to test … Read more
Learn how to write, compile, package Java programs in the commandline without the comfort of an IDE
Quick introduction to JUnit 5. Consider this as a cheat sheet to help you work with JUnit
Overview This tutorial shows you what equals and hashCode are and how to properly override them. If you have written in Java long enough, you will learn that using the equals method instead of == is the right way to assert equality. This is because the == operator compares the two objects’ memory addresses. The … Read more
Overview CountDownLatch, as the name suggests, it provides a countdown mechanism. One use case of this class is to block the calling thread until all other specified threads are complete. It sounds vague, doesn’t it? Let’s consider one concrete example to boost our understanding. CountDownLatch Mechanism The principle of CountDownLatch is you create a countdown … Read more