Java 15 became GA earlier this month (Sept 2020) (as announced by Oracle). As per Oracle’s now regular time-based schedule for major new releases of Java, this release was expected and comes 6 months after the previous one (Java 14 in March 2020). In this post I outline what I personally consider to be the most significant new features in Java 15 from a developer’s perspective, focusing primarily on the new Java language. I’ve also included some of the changes to the JDK core libraries / APIs and the JVM which will be of interest to developers.Continue reading
Deploying and running services on Function-as-a-Service (FaaS) compute platforms like AWS Lambda has some compelling benefits for appropriate use-cases (short running workloads), including true (low-latency) elastic scalability, at finer granularity, with significant cost-savings based on scaling to zero.
At the same time, the Spring application framework (and more recently Spring Boot) has long encouraged and helped accelerate building modern, flexible enterprise apps that run on the JVM, that are easy to test, by abstracting away generic code (‘plumbing’) for integrating an app with its libraries and APIs; using familiar design/programming patterns (IoC/DI, proxies, Template methods etc); and providing valuable features (declarative transaction management, environment specific config, etc).
In an ideal world we’d use all these technologies – building Java/JVM functions with the help of Spring that are deployed and run on AWS Lambda – to realise their combined benefits.
But can these technologies be made to work together effectively? Or do we need to accept that when it comes to designing and building services to run on FaaS platforms like AWS Lambda, tech stacks (programming languages and application framework) offer than Java and Spring may offer a better solution?
Java 12, or more accurately the Java Development Kit (JDK) 12) was officially released by Oracle on the 19th March 2019. This blog post highlights the subset of new features in this next major release of Java that will be of most interest to enterprise Java developers, in terms of the Java language, the core library APIs and other JDK features. It also outlines the support & maintenance available for this new release, and how this might influence your decision on whether to adopt it in production.
Java 11 was officially released by Oracle on 25th Sept 2018. This blog post highlights the subset of features in this next major release of Java that will be of most interest to enterprise Java developers. These include a small number of new language features, for which I have also provided some code examples showcasing how they can be used. This post also outlines the significance of this new Java release from a support & maintenance perspective; upgrade considerations; and includes a reminder about the recent change in the licensing terms for the Oracle JDK.
Oracle have recently made several changes concerning how they maintain, support & license use of Java (more accurately the JDK). This has commercial & technical implications for all enterprises running apps on the JVM (users of the JDK) in production – regardless of the app programming language (Java, Groovy, Kotlin, etc).
Don’t panic! Java is still free. But anyone responsible for developing or provisioning JVM apps for production usage needs to be aware of these changes and consider how it impacts their teams and business.
Java (or more accurately JDK) 10 was officially released on 20th March 2018. It includes a total of 12 new features, a full list of which can be found on the OpenJDK project page for JDK 10 , including links to their relevant JDK Enhancement Proposal (JEP) describing each in more detail. This blog post highlights the subset of features that will be of most interest to enterprise Java developers. These include a small number of new Java language features, for which I have also provided some code examples showing how they can be used.
Java Standard Edition (JSE) 9 (‘Java 9’) was finally completed and publicly released at the end of Sept 2017. This post contains a brief overview of what’s new in Java 9, and outlines the main reasons why you or your business might consider upgrading, if at all. It also provides developers with a link to a set of code examples that I’ve produced, which showcase the major new language features in Java 9 and explains each of them in more detail.
I’ve recently designed and built an open source API client for the REST API of a major enterprise video and webcast service, for use by its customers. It was a rewarding exercise that has helped me gain some valuable additional practical experience of emerging technology and tools for building and testing apps. This post outlines the value of the API client, its design, the technologies and tools I used, and how I rate them. I’ve open sourced the code to allow customers, and others, to view and reuse what I’ve built.
Over the course of the last month or so, I’ve invested some time familiarising myself with the major new features in Java 8, learning how to apply them, and understanding the benefits which can be gained from using them. As part of this exercise I’ve produced some code examples (see below) for the following features:
- Lambda expressions
- Streams (aka bulk or aggregate data operations)
- Default methods
- Date/time API
- Optional type