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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
Breadth-First Search Algorithm in Java 1. Overview In this tutorial, we’re going to learn about the Breadth-First Search algorithm, which allows us to search for a node in a tree or a graph by traveling through their nodes breadth-first rather than depth-first. First, we’ll go through a bit of theory… Continue Reading java-breadth-first-search
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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
Excluding URLs for a Filter in a Spring Web Application 1. Overview Most web applications have a use-case of performing operations like request logging, validation, or authentication. And, what’s more, such tasks are usually shared across a set of HTTP endpoints. The good news is that the Spring web framework… Continue Reading spring-exclude-filter
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Prototype Pattern in Java 1. Introduction In this tutorial, we’re going to learn about one of the Creational Design Patterns – the Prototype pattern. At first, we’ll explain this pattern and then proceed to implement it in Java. We’ll also discuss some of its advantages and disadvantages. 2. Prototype Pattern… Continue Reading java-pattern-prototype
Searching for a String in an ArrayList 1. Overview In this tutorial, we’ll look into different ways to search for a String in an ArrayList. Our intent is to check if a specific non-empty sequence of characters is present in any of the elements in the ArrayList and to return a… Continue Reading java-search-string-arraylist
Java Weekly, Issue 307 1. Spring and Java ===== >> Static Data with Spring Boot [reflectoring.io] A good tutorial on externalizing application configuration with @ConfigurationProperties. >> The best way to fix the Hibernate MultipleBagFetchException [vladmihalcea.com] A quick look at the right way to solve this problem, while exposing inefficiencies of an… Continue Reading java-weekly-307
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Using a Slash Character in Spring URLs 1. Introduction When we develop web services, we may need to deal with complex or unexpected URL paths that can contain slashes. As a consequence, we may encounter issues with the web servers or frameworks we are using. Spring specifically can be a… Continue Reading spring-slash-character-in-url
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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
Finding an Element in a List Using Kotlin 1. Overview In this tutorial, we’re going to see how to find an element in a list using Kotlin language. Also, we’re going to filter this list by a condition. 2. Find an Element in a List Let’s say that we have… Continue Reading kotlin-finding-element-in-list