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Java Web Weekly, Issue 172 Lots of interesting writeups on Java 9 this week. Here we go… 1. Spring and Java ===== >> Accessing private state of Java 9 modules [in.relation.to] The introduction of modularity to Java 9 sheds new light on accessing private fields using “deep reflection”. As well… Continue Reading java-web-weekly-172
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Hibernate Validator Specific Constraints 1. Overview In this tutorial, we’re going to review Hibernate Validator constraints, which are built into Hibernate Validator but are outside the Bean Validation spec. For a recap of Bean Validation, please refer to our article on Java Bean Validation Basics. 2. Hibernate Validator Setup At the very… Continue Reading hibernate-validator-constraints
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Intro to Feign 1. Overview In this tutorial, we will introduce and explain Feign, a declarative HTTP client developed by Netflix. Feign aims at simplifying HTTP API clients. Simply put, the developer needs only to declare and annotate an interface while the actual implementation will be provisioned at runtime. 2.… Continue Reading intro-to-feign
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Quick Guide to java.lang.System 1. Overview In this tutorial, we’ll take a quick look at the java.lang.System class and its features and core functionality. 2. IO System is a part of java.lang, and one of its main features is to give us access to the standard I/O streams. Simply put,… Continue Reading java-lang-system
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File Size in Java 1. Overview In this quick tutorial, we’ll learn how to get the size of a file in Java – using Java 7, the new Java 8 and Apache Common IO. Finally – we will also get a human readable representation of the file size. 2. Standard… Continue Reading java-file-size
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Spring Boot: Customize Whitelabel Error Page 1. Overview In this article, we’re going to look at how to disable and customize the default error page for a Spring Boot application as proper error handling depicts professionalism and quality work. 2. Disabling the Whitelabel Error Page First, let’s see how we… Continue Reading spring-boot-custom-error-page
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Spring Boot and Togglz Aspect 1. Overview In this tutorial, we’re going to take a look at how the Togglz library can be used with a Spring Boot application. 2. Togglz The Togglz library provides an implementation of the Feature Toggles design pattern. This pattern refers to having a mechanism… Continue Reading spring-togglz
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Java Weekly, Issue 284 Here we go… 1. Spring and Java ===== >> Introducing Spring Cloud App Broker [spring.io] With this Spring Cloud Services 3.0 release, it’s even easier to develop your own service broker with less boilerplate. >> Running TestProject Tests on a Local Development Environment [petrikainulainen.net] A step-by-step… Continue Reading java-weekly-284
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OData Protocol Guide 1. Introduction In this tutorial, we’ll explore OData, a standard protocol that allows easy access to data sets using a RESTFul API. 2. What is OData? OData is an OASIS and ISO/IEC Standard for accessing data using a RESTful API. As such, it allows a consumer to… Continue Reading odata
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Working with Images in Java 1. Overview In this tutorial, we are going to take a look at a few available image-processing libraries, and perform simple image processing operation – loading an image and drawing a shape on it. We’ll try out AWT (and a bit of Swing) library, ImageJ,… Continue Reading java-images
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