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How to TDD a List Implementation in Java 1. Overview In this tutorial, we’ll walk through a custom List implementation using the Test-Driven Development (TDD) process. This is not an intro to TDD, so we’re assuming you already have some basic idea of what it means and the sustained… Continue Reading java-test-driven-list
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Java IntStream Conversions 1. Introduction In this quick tutorial, we’ll go through all the possibilities regarding IntStream conversions to other types. Interesting readings about boxing and unboxing or iterating are recommended as a complement of this tutorial. 2. IntStream to Array Let’s start exploring how we can convert from an… Continue Reading java-intstream-convert
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Basic Introduction to JMX 1. Introduction The Java Management Extensions (JMX) framework was introduced in Java 1.5 and has found widespread acceptance in the Java developers community since its inception. It provides an easily configurable, scalable, reliable and more or less friendly infrastructure for managing Java application either locally or… Continue Reading java-management-extensions
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Implementing Simple State Machines with Java Enums Algorithms Java 1. Overview In this tutorial, we’ll have a look at State Machines and how they can be implemented in Java using Enums. We’ll also explain the advantages of this implementation compared to using an interface and a concrete class for each… Continue Reading java-enum-simple-state-machine
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Optional orElse Optional 1. Introduction In some cases, we might want to fallback to another Optional instance if another one is empty. In this tutorial, we’ll briefly mention how we can do that – which is harder than it looks. For an introduction to the Java Optional class, have a… Continue Reading java-optional-or-else-optional
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Implementing a Simple Blockchain in Java 1. Overview In this tutorial, we’ll learn the basic concepts of blockchain technology. We’ll also implement a basic application in Java that focuses on the concepts. Further, we’ll discuss some advanced concepts and practical applications of this technology. 2. What is Blockchain? So, let’s… Continue Reading java-blockchain
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Importance of Main Manifest Attribute in a Self-Executing JAR DevOps Java 1. Overview Every executable Java class has to contain a main method. Simply put, this method is a starting point of an application. To run our main method from a self-executing JAR file, we have to create a proper… Continue Reading java-jar-executable-manifest-main-class
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Zipping Collections in Java 1. Introduction In this tutorial, we’ll illustrate how to zip two collections into one logical collection. The “zip” operation is slightly different from the standard “concat” or “merge”. While the “concat” or “merge” operations will simply add the new collection at the end of the existing… Continue Reading java-collections-zip
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Difference between URL and URI 1. Overview In this short article, we’ll take a look at the main differences between URIs and URLs and implement examples to highlight those differences. 2. URI and URL The difference between them is straightforward after knowing their definitions: Uniform Resource Identifier (URI) − a… Continue Reading java-url-vs-uri
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A Guide to Crawler4j 1. Introduction We see web crawlers in use every time we use our favorite search engine. They’re also commonly used to scrape and analyze data from websites. In this tutorial, we’re going to learn how to use crawler4j to set up and run our own web… Continue Reading crawler4j
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