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Spring Data Java 8 Support 1. Overview Spring Data now supports core Java 8 features – such as Optional, Stream API and CompletableFuture. In this quick article, we’ll go through some examples of how we can use these with the framework. 2. Optional Let’s start with the CRUD repository methods… Continue Reading spring-data-java-8
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Introduction to the Java 8 Date/Time API 1. Overview Java 8 introduced new APIs for Date and Time to address the shortcomings of the older java.util.Date and java.util.Calendar. As part of this article, let’s start with the issues in the existing Date and Calendar APIs and let’s discuss how the… Continue Reading java-8-date-time-intro
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Java 8 StringJoiner 1. Introduction StringJoiner is a new class added in Java 8 under java.util package. Simply put, it can be used for joining Strings making use of a delimiter, prefix, and suffix. 2. Adding Elements We can add Strings using the add() method: @Test public void whenAddingElements_thenJoinedElements() {… Continue Reading java-string-joiner
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Guide To Java 8 Optional 1. Overview In this tutorial, we’re going to show the Optional class that was introduced in Java 8. The purpose of the class is to provide a type-level solution for representing optional values instead of null references. To get a deeper understanding of why we should care… Continue Reading java-optional
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Exceptions in Java 8 Lambda Expressions 1. Overview In Java 8, Lambda Expressions started to facilitate functional programming by providing a concise way to express behavior. However, the Functional Interfaces provided by the JDK don’t deal with exceptions very well – and the code becomes verbose and cumbersome when it… Continue Reading java-lambda-exceptions
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Primitive Type Streams in Java 8 1. Introduction The Stream API was one of the key features added in Java 8. Briefly, the API allows us to process collections and other sequences of elements – conveniently and more efficiently – by providing a declarative API. 2. Primitive Streams Streams primarily… Continue Reading java-8-primitive-streams
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The Double Colon Operator in Java 8 1. Overview In this quick article, we’ll discuss the double colon operator ( :: ) in Java 8 and go over the scenarios where the operator can be used. Further reading: Java 8 Interview Questions(+ Answers) A set of popular Java8-related interview questions… Continue Reading java-8-double-colon-operator
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Java 8 Stream API Analogies in Kotlin 1. Introduction Java 8 introduced the concept of Streams to the collection hierarchy. These allow for some very powerful processing of data in a very readable way, utilizing some functional programming concepts to make the process work. We will investigate how can we… Continue Reading java-8-stream-vs-kotlin
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String Operations with Java Streams 1. Overview Java 8 has introduced a new Stream API that lets us process data in a declarative manner. In this quick article, we would learn how to use the Stream API to split a comma-separated String into a list of Strings and how to… Continue Reading java-stream-operations-on-strings
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The Java 8 Stream API Tutorial 1. Overview In this in-depth tutorial, we’ll go through the practical usage of Java 8 Streams from creation to parallel execution. To understand this material, readers need to have a basic knowledge of Java 8 (lambda expressions, Optional, method references) and of the Stream… Continue Reading java-8-streams
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