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Guide to the Guava BiMap
1. Overview In this tutorial, we’ll show how to use the Google Guava’s BiMap interface and its multiple implementations. A BiMap (or “bidirectional map”) is a special kind of a map which maintains an...
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Java Web Weekly, Issue 160
Lots of solid reactive focused talks this week. Here we go… 1. Spring and Java >> Java 10 Could Bring Upgraded Lambdas [infoq.com] A short report about a cool possible enhancement of Lambda...
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Iterable to Stream in Java
1. Overview In this short tutorial, let’s convert a Java Iterable object into a Stream and perform some standard operations on it. 2. Converting Iterable to Stream The Iterable interface is designed...
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Concurrency with LMAX Disruptor – An Introduction
1. Overview This article introduces the LMAX Disruptor and talks about how it helps to achieve software concurrency with low latency. We will also see a basic usage of the Disruptor library. 2. What...
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A Guide to LinkedHashMap in Java
1. Overview In this article, we are going to explore the internal implementation of LinkedHashMap class. LinkedHashMap is a common implementation of Map interface. This particular implementation is a...
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findFirst() and findAny() in the Java 8 Stream API
1. Introduction The Java 8 Stream API introduced two methods that are often being misunderstood: findAny() and findFirst(). In this quick tutorial, we will be looking at the difference between these...
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Spring Cloud Sleuth in a Monolith Application
1. Overview In this article, we’re introducing Spring Cloud Sleuth – a powerful tool for enhancing logs in any application, but especially in a system built up of multiple services. And for this...
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JSON Processing in Java EE 7
1. Overview This article will show you how to process JSON using only core Java EE, without the use of third-party dependencies like Jersey or Jackson. Pretty much everything we’ll be using is...
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Guide to Guava RangeSet
1. Overview In this tutorial, we’ll show how to use the Google Guava’s RangeSet interface and its implementations. A RangeSet is a set comprising of zero or more non-empty, disconnected ranges. When...
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Simple Inheritance with Jackson
1. Overview In this tutorial, we’re going to take a look at inheritance and in particular how to handle JSON serialization and deserialization of Java classes that extend a superclass. In order to get...
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Guide to Guava RangeMap
1. Overview In this tutorial, we’ll show how to use the Google Guava’s RangeMap interface and its implementations. A RangeMap is a special kind of mapping from disjoint non-empty ranges to non-null...
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A Guide to TreeMap in Java
1. Overview In this article, we are going to explore TreeMap implementation of Map interface from Java Collections Framework(JCF). TreeMap is a map implementation that keeps its entries sorted...
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Intro to Spring Remoting with HTTP Invokers
1. Overview In some cases, we need to decompose a system into several processes, each taking responsibility for a different aspect of our application. In these scenarios is not uncommon that one of...
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Guide to EJB Set-up
1. Overview In this article, we’re going to discuss how to get started with Enterprise JavaBean (EJB) development. Enterprise JavaBeans are used for developing scalable, distributed, server-side...
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Java Web Weekly, Issue 161
1. Spring and Java >> Bean Validation 2.0 Progress Report [beanvalidation.org] The new features of the Bean Validation 2.0 definitely look promising. >> Swift for Beans – var, let and Type...
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Guide to CountDownLatch in Java
1. Introduction In this article, we’ll give a guide to the CountDownLatch class and demonstrate how it can be used in a few practical examples. Essentially, by using a CountDownLatch we can cause a...
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Introduction to the Kotlin Language
1. Overview In this tutorial, we’re going to take a look at Kotlin, a new language in the JVM world, and some of its basic features, including classes, inheritance, conditional statements, and looping...
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New Stream Collectors in Java 9
1. Overview Collectors were added in Java 8 which helped accumulate input elements into mutable containers such as Map, List, and Set. In this article, we’re going to explore two new collectors added...
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Spring Data MongoDB: Projections and Aggregations
1. Overview Spring Data MongoDB provides simple high-level abstractions to MongoDB native query language. In this article, we will explore the support for Projections and Aggregation framework. If...
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MaxUploadSizeExceededException in Spring
1. Overview In the Spring framework, a MaxUploadSizeExceededException is thrown when an application attempts to upload a file whose size exceeds a certain threshold as specified in the configuration....
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