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Defining JPA Entities 1. Introduction In this tutorial, we’ll learn about the basics of entities along with various annotations that define and customize an entity in JPA. 2. Entity Entities in JPA are nothing but POJOs representing data that can be persisted to the database. An entity represents a table… Continue Reading jpa-entities
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Java Web Weekly, Issue 164 Lots of interesting writeups on Java 9 this week. Here we go… 1. Spring and Java ===== >> Signing and verifying a standalone JAR [frankel.ch] Signing a JAR file created by Spring Boot can be quite tricky. >> Repackaging Exceptions In Streams [codefx.org] Handling checked… Continue Reading java-web-weekly-164
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Parsing YAML with SnakeYAML 1. Overview In this tutorial, we’ll learn how to use SnakeYAML library to serialize Java objects to YAML documents and vice versa. 2. Project Setup In order to use SnakeYAML in our project, we’ll add the following Maven dependency (the latest version can be found here):… Continue Reading java-snake-yaml
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Getting Started with Mockito @Mock, @Spy, @Captor and @InjectMocks 1. Overview In this tutorial, we’ll cover the annotations of the Mockito library – @Mock, @Spy, @Captor, and @InjectMocks. For more Mockito goodness, have a look at the series here. Further reading: Mockito – Using Spies Making good use of Spies… Continue Reading mockito-annotations
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A Quick Guide to Using Keycloak with Spring Boot 1. Overview In this article, we’ll cover the basics of setting up a Keycloak server, how to connect a Spring Boot application to it, and how to use it with Spring Security. 2. What Is Keycloak? Keycloak is an open source… Continue Reading spring-boot-keycloak
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Find If Two Numbers Are Relatively Prime in Java 1. Overview Given two integers, a and b, we say that they are relatively prime if the only factor that divides both is 1. Mutually prime or coprime are synonyms for relatively prime numbers. In this quick tutorial, we’ll walk through a… Continue Reading java-two-relatively-prime-numbers
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How to Get the Size of an Object in Java 1. Overview Unlike C/C++ where we can use sizeof() method to get an object size in bytes, there’s no true equivalent of such method in Java. In this article, we’ll demonstrate how we can still get the size of a… Continue Reading java-size-of-object
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Guide to Java 10 1. Introduction JDK 10, which is an implementation of Java SE 10, was released on March 20, 2018. In this article, we’ll cover and explore the new features and changes introduced in JDK 10. 2. Local Variable Type Inference Follow the link for an in-depth article… Continue Reading java-10-overview
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A Guide to XML in Java 1. Overview This is a guide to working with XML in Java. We’ll go over the most common Java XML processing libraries – for both parsing and binding. 2. DOM Parsers Simply put, a DOM parser works on the entire XML document, loads it… Continue Reading java-xml
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Vert.x Spring Integration Spring 1. Overview In this quick article, we’ll discuss the integration of Spring with Vert-x and leverage the best of both worlds: the powerful and well-known Spring feature, and the reactive single-event loop from Vert.x. To understand more about Vert.x, please refer to our introductory article here.… Continue Reading spring-vertx
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