You can build Web UI using Java only

on YouTube ↗10m

" summary

Claim: you can build a full web UI using Java only, exemplified by a one-class Hello World view that wires a text field and button and runs on the JVM so you can debug in your IDE. The demo uses Vaadin components (bundled Java + frontend) synced over HTTP or WebSockets, targets CRUD and dashboards, and ships as a single dependency plus a frontend plug‑in. Project generation at start.vaadin.com and the conference site itself is implemented with Vaadin.

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