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Parsing Command-Line Parameters with JCommander 1. Overview In this tutorial, we’ll learn how to use JCommander to parse command-line parameters. We’ll explore several of its features as we build a simple command-line application. 2. Why JCommander? “Because life is too short to parse command line parameters” – Cédric Beust JCommander, created by Cédric… Continue Reading jcommander-parsing-command-line-parameters
Generating Random Dates in Java 1. Overview In this tutorial, we’re going to see how to generate random dates and times in bounded and unbounded fashions. We’ll be looking at how to generate these values using the legacy java.util.Date API and also the new date-time library from Java 8. 2.… Continue Reading java-random-dates
System.out.println vs Loggers 1. Why Loggers? While writing a program or developing an enterprise production application, using System.out.println seems to be the simplest and easiest option. There are no extra libraries to be added to the classpath and no additional configurations to be made. But using System.out.println comes with several… Continue Reading java-system-out-println-vs-loggers
Practical Application of Test Pyramid in Spring-based Microservice 1. Overview In this tutorial, we’ll understand the popular software-testing model called the test pyramid. We’ll see how it’s relevant in the world of microservices. In the process, we’ll develop a sample application and relevant tests to conform to this model. In… Continue Reading spring-test-pyramid-practical-example
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Flogger Fluent Logging 1. Overview In this tutorial, we’re going to talk about the Flogger framework, a fluent logging API for Java designed by Google. 2. Why use Flogger? With all the logging frameworks that are currently in the market, like Log4j and Logback, why do we need yet another… Continue Reading flogger-logging
Authentication with HttpUrlConnection 1. Overview In this tutorial, we’re going to explore how to authenticate HTTP requests using the HttpUrlConnection class. 2. HTTP Authentication In web applications, servers may require clients to authenticate themselves. Failing to comply usually results in the server returning an HTTP 401 (Unauthorized) status code. There… Continue Reading java-http-url-connection
Using Lombok’s @Accessors Annotation 1. Overview It’s pretty typical to have get and set methods in our domain objects, but there are other ways that we may find more expressive. In this tutorial, we’ll learn about Project Lombok‘s @Accessors annotation and its support for fluent, chained, and custom accessors. Before continuing,… Continue Reading lombok-accessors
Parsing an XML File Using SAX Parser 1. Overview SAX, also known as the Simple API for XML, is used for parsing XML documents. In this tutorial, we’ll learn what SAX is and why, when and how it should be used. 2. SAX: The Simple API for XML SAX is… Continue Reading java-sax-parser
Guide to java.lang.ProcessBuilder API 1. Overview The Process API provides a powerful way to execute operating system commands in Java. However, it has several options that can make it cumbersome to work with. In this tutorial, we’ll take a look at how Java alleviates that with the ProcessBuilder API. 2.… Continue Reading java-lang-processbuilder-api
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Introduction to Dagger 2 1. Introduction In this tutorial, we’ll take a look at Dagger 2 – a fast and lightweight dependency injection framework. The framework is available for both Java and Android, but the high-performance derived from compile-time injection makes it a leading solution for the latter. 2. Dependency… Continue Reading dagger-2
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