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Flyweight Pattern in Java 1. Overview In this article, we’ll take a look at the flyweight design pattern. This pattern is used to reduce the memory footprint. It can also improve performance in applications where object instantiation is expensive. Simply put, the flyweight pattern is based on a factory which… Continue Reading java-flyweight
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Spring Events 1. Overview In this article, we’ll be discussing how to use events in Spring. Events are one of the more overlooked functionalities in the framework but also one of the more useful. And – like many other things in Spring – event publishing is one of the capabilities provided… Continue Reading spring-events
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A Guide to the Java LinkedList 1. Introduction LinkedList is a doubly-linked list implementation of the List and Deque interfaces. It implements all optional list operations and permits all elements (including null). 2. Features Below you can find the most important properties of the LinkedList: Operations that index into the… Continue Reading java-linkedlist
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How to Start a Thread in Java 1. Introduction In this tutorial, we’re going to explore different ways to start a thread and execute parallel tasks. This is very useful, in particular when dealing with long or recurring operations that can’t run on the main thread, or where the UI… Continue Reading java-start-thread
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Spring WebClient Requests with Parameters 1. Overview A lot of frameworks and projects are introducing reactive programming and asynchronous request handling. Consequently, Spring 5 introduced a reactive WebClient implementation as a part of the WebFlux framework. In this tutorial, we’ll see how to reactively consume REST API endpoints with WebClient.… Continue Reading webflux-webclient-parameters
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Radix Sort in Java Algorithms Java 1. Introduction In this tutorial, we’ll learn about Radix Sort, analyze its performance, and take a look at its implementation. Here we focus on using Radix Sort to sort integers, but it’s not limited to just numbers. We can use it to sort other… Continue Reading java-radix-sort
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Converting Iterator to List 1. Overview In this short tutorial, we’ll learn how to convert an Iterator to a List in Java. We’ll cover a few examples using a while loop, Java 8, and a few common libraries. We’ll use an Iterator with Integers for all our examples: Iterator<Integer> iterator… Continue Reading java-convert-iterator-to-list
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How to Remove the Last Character of a String? 1. Overview In this quick article, we are going to check and discuss different techniques for removing the last character of a String. 2. Using String.substring() The easiest way is to use the built-in substring() method of the String class. In… Continue Reading java-remove-last-character-of-string
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Learn JUnit JUnit – Testing Basics + A Guide to JUnit 5 + JUnit 5 @Test Annotation + @Before vs @BeforeClass vs @BeforeEach vs @BeforeAll + Assert an Exception is Thrown in JUnit 4 and 5 + Assertions in JUnit 4 and JUnit 5 JUnit – Integration with Other Libraries… Continue Reading junit
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Spring Security and OpenID Connect 1. Overview In this quick tutorial, we’ll focus on setting up OpenID Connect with a Spring Security OAuth2 implementation. OpenID Connect is a simple identity layer built on top of the OAuth 2.0 protocol. And, more specifically, we’ll learn how to authenticate users using the… Continue Reading spring-security-openid-connect
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