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JHipster with a Microservice Architecture 1. Introduction In this writeup, we’ll explore an interesting example with JHipster – building a simple microservices architecture. We’ll show how to build and deploy all the required pieces, and in the end, we’ll have a full-blown microservice application up and running. If you’re new… Continue Reading jhipster-microservices
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Java InputStream to Byte Array and ByteBuffer 1. Overview In this quick tutorial, we’re going to take a look at how to convert an InputStream to a byte[] and ByteBuffer – first using plain Java, then using Guava and Commons IO. This article is part of the “Java – Back to… Continue Reading convert-input-stream-to-array-of-bytes
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Concatenating Strings In Java 1. Introduction Java provides a substantial number of methods and classes dedicated to concatenating Strings. In this tutorial, we’ll dive into several of them as well as outline some common pitfalls and bad practices. 2. StringBuilder First up is the humble StringBuilder. This class provides an array of String-building utilities… Continue Reading java-strings-concatenation
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Measure Elapsed Time in Java 1. Overview In this article, we’re going to have a look at how to measure elapsed time in Java. While this may sound easy, there’re a few pitfalls that we must be aware of. We’ll explore standard Java classes and external packages that provide functionality… Continue Reading java-measure-elapsed-time
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JAX-RS is just an API! 1. Overview The REST paradigm has been around for quite a few years now and it’s still getting a lot of attention. A RESTful API can be implemented in Java in a number of ways: you can use Spring, JAX-RS, or you might just write… Continue Reading jax-rs-spec-and-implementations
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Configure a RestTemplate with RestTemplateBuilder 1. Introduction In this quick tutorial, we’re going to look at how to configure a Spring RestTemplate bean. Let’s start by discussing the three main configuration types: using the default RestTemplateBuilder using a RestTemplateCustomizer creating our own RestTemplateBuilder To be able to test this easily, please follow… Continue Reading spring-rest-template-builder
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Getting the Size of an Iterable in Java 1. Overview In this quick tutorial, we’ll learn about the various ways in which we can get the size of an Iterable in Java. 2. Iterable and Iterator Iterable is one of the main interfaces of the collection classes in Java. The… Continue Reading java-iterable-size
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Infix Functions in Kotlin 1. Introduction Kotlin is a language that adds many fresh features to allow writing cleaner, easier-to-read code. This, in turn, makes our code significantly easier to maintain and allows for a better end result from our development. Infix notation is one of such features. 2. What… Continue Reading kotlin-infix-functions
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Lambda Expressions and Functional Interfaces: Tips and Best Practices 1. Overview Now that Java 8 has reached wide usage, patterns, and best practices have begun to emerge for some of its headlining features. In this tutorial, we will take a closer look to functional interfaces and lambda expressions. Further reading:… Continue Reading java-8-lambda-expressions-tips
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Programmatically Restarting a Spring Boot Application 1. Overview In this tutorial, we’ll show how to programmatically restart a Spring Boot application. Restarting our application can be very handy in some cases: Reloading config files upon changing some parameter Changing the currently active profile at runtime Re-initializing the application context for any reason… Continue Reading java-restart-spring-boot-app
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