Single-Page Apps Make Java Fun Again
Java used to be fun. You could write your code, it ran everywhere,
even in the browser. You could make animations, games, chat apps, and
more. It was all new and exciting.
As time went by, the promise of Java held true. Code you wrote kept on working.
Applets you wrote worked years later. Web Start came along and let
you deploy desktop apps easily via the web.
Then the browser vendors turned on Java. Whether it was Google
looking for payback against Oracle for their Java lawsuit, or Mozilla
Java. For the first time the availability of Java to consumers began
A New Hope
Around the time things started looking bleak for mass distribution of
Java-based apps, TeaVM appeared on the scene. A technology for
code in the browser using familiar tools. The developer of TeaVM
(Alexey Andreev) realized a Java-friendly framework for building
single-page apps was needed, so he implemented one on top of TeaVM and
called it Flavour.
The Development Experience
For Java developers, your familiar tools now can build true modern web
apps. You can develop in your IDE of choice. Autocomplete and other
editing shortcuts work well with TeaVM's JSO APIs, so you can write
code for the browser but leverage the power of a strongly-typed
Once built, the application is in the target folder, like any maven
app. Since the content is HTML plus a single JS file, you can open it
in a browser, and refresh after builds to see the latest version of
TeaVM produces a WAR file, so you can deploy it in an app container
like any other Java web app. However, at its core your app is an HTML
file, a classes.js file, and (optionally) an app.css file. you can
simply copy those files to a public folder on any web server and your
app is deployed.
Once deployed, anyone in the world can run your app by typing on the
URL. No downloading an app, no installer, no app store, just visit a
Bringing the Joy Back To Java
TeaVM makes developing Java front-ends fun. The development process
is familiar and easy. Deployment is a piece of cake. And users can
access your app from any device. Write Once, Run Anywhere? Yes!
Java the way it was meant to be.
Last modified on 16 Feb 2021 by AO
Copyright © 2021 Andrew Oliver