This article shows how to create a desktop app with UI based on web technologies.

Java_LibHunt serves as resource for Java developers offering a curated selection of libraries, frameworks, and tools to streamline the development process. Developers  can expect to gain insights into industry best practices, and stay updated about the latest innovations in Java development. Developers can get tips about productivity and efficiency, and use the Java platform to build robust, scalable, and performant applications.

Awesome Java Newsletter

Building modern desktop applications with Java doesn't have to mean using outdated UI toolkits like Swing or JavaFX. This guide demonstrates how to create a cross-platform Java desktop app using web technologies including shadcn/ui, React, and TypeScript. The approach uses JxBrowser to embed a Chromium-based web view, serves web resources from the classpath for security, and implements type-safe communication between JavaScript and Java using Protobuf and gRPC. This hybrid approach combines the power of Java backend with modern web UI capabilities.

Java desktop app with Shadcn UI

This only makes sense if you hate JavaScript, but you are writing JavaScript for the frontend anyway

Tile: shadcn in java
Reality: no shadcn in java, just another webview

alternative option like tauri is more performative

I am not sure why you are saying javaFX is outdated
it support css and has a a lot of libraries
also have a good performance !
I think adding extra layer for js and connected to a java backend will just add extra complexity + performance issues and maybe increasing in the memory usage and project size !
take a look at this showcase repo
<a href="https://github.com/Abdulqadir-Aldhalia/SAYYAR-Showcase" target="_blank" rel="noopener nofollow">https://github.com/Abdulqadir-Aldhalia/SAYYAR-Showcase</a>