It just so happens that I’ve built one already: TUI4J (Terminal User Interface for Java).

https://github.com/WilliamAGH/tui4j

It combines a port of BubbleTea from Go, and Textual and other inspired rewrites of other functionality.

It’s a fork of someone’s earlier work that I sought to expand/stabilize.

I built a beautifully simple LLM chat interface with full dialog windows, animations, and full support for keyboard and mouse interactivity parity, showing what this Java library is capable of.

Example chat app: https://github.com/WilliamAGH/brief

Would love to see others build similar things with it!