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Java SlideShow app

13 points · submitted Apr 2026 by u/jeffreportmill · archived

For our JavaOne presentation on "Java and WebAssembly", we used a home-brew Java-in-the-browser presentation tool to demonstrate our point (as subtly as possible?). Only a couple weeks of development, it turns any markdown file on the web into a slide show.

Click here to run it yourself: https://reportmill.com/SlideShow

https://preview.redd.it/3m0pz3xrplsg1.png?width=2454&format=png&auto=webp&s=6cdd76b7d8a961af2e7dbad1ae582b2d63dd18ea

The code is in the 'snapshow' directory of this demos repo: https://github.com/reportmill/SnapDemos

7 comments · 85% upvoted · other discussions

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[deleted] 1 points · Apr 2026

[removed]

jeffreportmill [OP] 1 points · Apr 2026

Thanks! It is using CheerpJ which lets me launch the desktop version in the browser. The CheerpJ JVM is WASM and it does a JIT of Java runtime and my jar to ASM.js (they will eventually transition that to WASM, but for now JS still has some benefits).

I can also do AOT compile with very small runtime with TeaVM: https://reportmill.com/SlideShow/teavm/

The TeaVM version is older (I enjoy the convenience of CheerpJ using the same jar).

wishper77 1 points · Apr 2026

I'm interested in the session itself.. can't find it online though. Has it been recorded?

jeffreportmill [OP] 2 points · Apr 2026

They recorded all sessions - I think they plan to release them all in the coming months. So far I think it's only been the keynotes and a few others.

wishper77 2 points · May 2026

http://youtube.com/post/UgkxnKOC5sYQifLP22XuMmzyN21xyhBDtnJ0?si=taaAOLZR0krkChWa

Is this one?

Edit - sorry, stupid question. It is that one :)

wishper77 1 points · Apr 2026

Thanks