Java 9Tag ArchiveSubscribe

Java 9 – Exploring the REPL 1. Introduction This article is about jshell, an interactive REPL (Read-Evaluate-Print-Loop) console that is bundled with the JDK for the upcoming Java 9 release. For those not familiar with the concept, a REPL allows to interactively run arbitrary snippets of code and evaluate their… Continue Reading java-9-repl

Java 9 java.lang.Module API 1. Introduction Following A Guide to Java 9 Modularity, in this article, we’re going to explore the java.lang.Module API that was introduced alongside the Java Platform Module System. This API provides a way to access a module programmatically, to retrieve specific information from a module, and generally to work with… Continue Reading java-9-module-api

Handling NoClassDefFoundError for JAXBException in Java 9 1. Introduction For anyone who has tried upgrading to Java 9, they have likely experienced some sort of NoClassDefFoundError when compiling code that previously worked in earlier versions of Java. In this article, we’ll look at a common missing class, JAXBException, and different ways… Continue Reading java-9-jaxbexception

Introduction to Java 9 StackWalking API 1. Introduction In this quick article, we will have a look at Java 9’s StackWalking API. The new functionality provides access to a Stream of StackFrames, allowing us to easily browse stack in both directly and making good use of the powerful Stream API… Continue Reading java-9-stackwalking-api

Multi-Release Jar Files 1. Overview Java is constantly evolving and adding new features to the JDK. And, if we want to use those features in our APIs, then that can obligate downstream dependencies to upgrade their JDK version. Sometimes, we are forced to wait on using new language features in… Continue Reading java-multi-release-jar

Java 9 java.util.Objects Additions 1. Introduction The java.util.Objects class has been part of Java since version 1.7. This class provides static utility methods for objects which can be used to perform some of the everyday tasks like checking for equality, null checks, etc. In this article, we will look at… Continue Reading java-9-objects-new

Java 9 Optional API Additions 1. Overview In this article, we will be looking at the Java 9 additions to the Optional API. Beyond modularity, Java 9 is also adding three very useful methods for the Optional class. 2. The or() Method Sometimes, when our Optional is empty, we want… Continue Reading java-9-optional

Java 9 Process API Improvements   1. Overview The process API in Java had been quite primitive prior to Java 5, the only way to spawn a new process was to use the Runtime.getRuntime().exec() API. Then in Java 5, ProcessBuilder API was introduced which supported a cleaner way of spawning… Continue Reading java-9-process-api

A Guide to Java 9 Modularity 1. Overview Java 9 introduces a new level of abstraction above packages, formally known as the Java Platform Module System (JPMS), or “Modules” for short. In this tutorial, we’ll go through the new system and discuss its various aspects. We’ll also build a simple… Continue Reading java-9-modularity