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String Not Empty Test Assertions in Java 1. Overview In certain scenarios, we need to assert if a given String is empty or not. There are quite a few ways to do such assertions in Java. Let’s explore some of those test assertion techniques in this quick tutorial. 2. Maven… Continue Reading java-assert-string-not-empty
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An Introduction to ZGC: A Scalable and Experimental Low-Latency JVM Garbage Collector 1. Introduction Today, it’s not uncommon for applications to serve thousands or even millions of users concurrently. Such applications need enormous amounts of memory. However, managing all that memory may easily impact application performance. To address this issue,… Continue Reading jvm-zgc-garbage-collector
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Simple AngularJS Front-End for a REST API 1. Overview In this quick tutorial we’ll learn how to consume a RESTful API from an simple AngularJS front-end. We’re going to display data in a table, create a resource, update it, and finally delete it. 2. The REST API First, let’s take… Continue Reading angular-js-rest-api
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Metaprogramming in Groovy 1. Overview Groovy is a dynamic and powerful JVM language which has numerous features like closures and traits. In this tutorial, we’ll explore the concept of Metaprogramming in Groovy. 2. What is Metaprogramming? Metaprogramming is a programming technique of writing a program to modify itself or another… Continue Reading groovy-metaprogramming
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Find the Registered Spring Security Filters 1. Overview Spring Security is based on a chain of servlet filters. Each filter has a specific responsibility and depending on the configuration, filters are added or removed. In this tutorial, we’ll discuss different ways to find the registered Spring Security Filters. 2. Security… Continue Reading spring-security-registered-filters
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Java Weekly, Issue 197 Lots of interesting writeups on Java 9 this week. Here we go… 1. Spring and Java ===== >> Spring Framework 5.0 goes GA ** [spring.io] >> Reacting to Spring Framework 5.0 [content.pivotal.io] Spring 5 is out! And, the Reactive Programming paradigm is the most significant addition… Continue Reading java-weekly-197
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A Guide to ConcurrentMap 1. Overview Maps are naturally one of the most widely style of Java collection. And, importantly, HashMap is not a thread-safe implementation, while Hashtable does provide thread-safety by synchronizing operations. Even though Hashtable is thread safe, it is not very efficient. Another fully synchronized Map, Collections.synchronizedMap,… Continue Reading java-concurrent-map
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Unmarshalling Dates Using JAXB 1. Introduction In this tutorial, we’re going to see how to unmarshal date objects with different formats using JAXB. First, we’ll cover the default schema date format. Then, we’ll explore how to use different formats. We’ll also see how we can handle a common challenge that… Continue Reading jaxb-unmarshalling-dates
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Fourth Round of Improvements to the Reddit Application 1. Overview In this tutorial, we’ll keep improving the simple Reddit application that we’re building as part of this public case study. 2. Better Tables for Admin First, we’ll bring the tables in the Admin pages to the same level as the… Continue Reading reddit-web-app-improvements-4
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Spring with Thymeleaf Pagination for a List 1. Overview In this quick tutorial, we’ll build a simple application to display a list of items with pagination using Spring and Thymeleaf. For an introduction on how to integrate Thymeleaf with Spring, please take a look at our article here. 2. Maven Dependencies… Continue Reading spring-thymeleaf-pagination
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