Apache Ant VS Google Web Toolkit

3) Recomendo realizar o download do JDK 7 ou superior, Apache Ant e Open SSL;

make has many detractors, but I've shipped some fairly large projects using nothing but it as the build system. Once you've settled on a particular implementation of make, you can get a lot done with it. The pain comes in when you want to do even modestly interesting things and you need it to work on both GNU make and SysV (or BSD) make. Its syntax also speaks loudly as to the era which it's from, but the same could be (unfavorably) said of things like Visual Studio project files and Ant.

Use GWT to compile your Java to JS.

The JavaScript library for the project (not on GitHub) is built with the GWT (http://www.gwtproject.org/) toolkit.

Not quite what you asked for, but here's a relatively mature Java to JavaScript compiler: http://www.gwtproject.org/

Transpiled languages were nothing new to the web dev community. Let’s see - we had CoffeeScript, Flow, Elm, GWT counts? sure why not, and of course TS (and probably more I’ve neglected). So we must ask ourselves why TS won, right? Well, at least I did.

You might want to try GWT (http://www.gwtproject.org) but it's class library is a bit different than usual java.

In the ancient times (12y ago) I managed to build a reasonably complicated 10+ GUI view / 1k+ user WebApp using Java only. I used GWT[1] and Sencha's Ext-GWT, now called GXT[2]

Depending on your needs, in 2021 I don't recommend starting with these. The reason I used it was that you could actually create widget-based SPAs using Java only (no JS, no CSS, no HTML), had excellent debugging support, and prototyping was fast.

But the webapp was more functional than pleasing in appearance. For an intranet tool / configuration utility etc. I might consider it again, but anything else where you want attract possible new users... I think you have to learn modern web dev stacks.

[1]: http://www.gwtproject.org/

[2]: https://www.sencha.com/products/gxt/

Google Web Toolkit? 😉 http://www.gwtproject.org/ It's ancient now but back around 2010 it was a gods-sent gift to me. I was tasked with writing a website for the internal use of a company I worked in and I had to develop both the backend and the frontend. I couldn't do it without GWT.