jd-gui

Install command: 
brew install --cask jd-gui

Name: JD-GUI

Standalone Java Decompiler GUI

https://java-decompiler.github.io/

Cask JSON API: /api/cask/jd-gui.json

Cask code: jd-gui.rb on GitHub

Current version: 1.6.6

Requirements: macOS >= 10.11

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