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A Guide to EnumMap 1. Overview EnumMap is a Map implementation that exclusively takes Enum as its keys. In this tutorial, we’ll discuss its properties, common use cases and when we should use it. 2. Project Setup Imagine a simple requirement where we need to map days of the week with the sport we… Continue Reading java-enum-map
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Apache Camel with Spring Boot 1. Overview At its core, Apache Camel is an integration engine, which – simply put – can be used to facilitate interactions between a wide and varied array of technologies. These bridges between services and technologies are called routes. Routes are implemented on an engine… Continue Reading apache-camel-spring-boot
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Using Spring @ResponseStatus to Set HTTP Status Code 1. Introduction In Spring MVC, we have many ways to set the status code of an HTTP response. In this short tutorial, we will see the most straightforward way: using the @ResponseStatus annotation. 2. On Controller Methods When an endpoint returns successfully,… Continue Reading spring-response-status
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Building a Web Application with Spring Boot and Angular 1. Overview Spring Boot and Angular form a powerful tandem that works great for developing web applications with a minimal footprint. In this tutorial, we’ll use Spring Boot for implementing a RESTful backend, and Angular for creating a JavaScript-based frontend. Further… Continue Reading spring-boot-angular-web
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Validating Input with Finite Automata in Java 1. Overview If you’ve studied CS, you’ve undoubtedly taken a course about compilers or something similar; in these classes, the concept of Finite Automaton (also known as Finite State Machine) is taught. This is a way of formalizing the grammar rules of languages.… Continue Reading java-finite-automata
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Warning: “The type MockitoJUnitRunner is deprecated” 1. Introduction In this quick tutorial, we’ll have a look at one of the warnings we may see when working with the popular testing framework Mockito. Namely, the one referring to the deprecated MockitoJUnitRunner class. We’ll see why this warning happens and how to… Continue Reading mockito-deprecated-mockitojunitrunner
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XML-Based Injection in Spring 1. Introduction In this basic tutorial, we’ll learn how to do simple XML-based bean configuration with the Spring Framework. 2. Overview Let’s start by adding Spring’s library dependency in the pom.xml: <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>5.1.4.RELEASE</version> </dependency> The latest version of the Spring dependency can be found… Continue Reading spring-xml-injection
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Spring Boot Consuming and Producing JSON 1. Overview In this tutorial, we’ll show how to build a REST service to consume and produce JSON content with Spring Boot. We’ll also take a look at how we can easily employ RESTful HTTP semantics. For simplicity, we won’t include a persistence layer,… Continue Reading spring-boot-json
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Returning Image/Media Data with Spring MVC 1. Overview In this tutorial, we’ll illustrate how to return images and other media using the Spring MVC framework. We will discuss several approaches, starting from directly manipulating HttpServletResponse than moving to approaches that benefit from Message Conversion, Content Negotiation and Spring’s Resource abstraction.… Continue Reading spring-mvc-image-media-data
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Java 8 and Infinite Streams 1. Overview In this article, we will be looking at a java.util.Stream API and we’ll see how we can use that construct to operate on an infinite stream of data/elements. The possibility of working on the infinite sequence of elements is predicated on the fact… Continue Reading java-inifinite-streams
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