JD-GUI is a free and open source Java De-compiler software that displays Java source codes of .class files. using JD-GUI you can browse the reconstructed source code for instant access to methods and fields. It is written in JAVA and released under GNU General Public License v3.0.
How to Install JD GUI on Ubuntu Linux
You can install JD-GUI via flatpak and native deb package file. First install flatpak and flathub on your system and restart it after the installation.
After that open the terminal software using the ctrl+alt+t keys or via the show applications menu and run below JD-GUI flatpak install command. It will install the latest version of JD-GUI on your system.
flatpak install flathub io.github.java_decompiler.jd-gui
And open the JD-GUI app using below command.
flatpak run io.github.java_decompiler.jd-gui
And uninstall JD-GUI using below command.
sudo flatpak uninstall io.github.java_decompiler.jd-gui
Install JD-GUI via DEB:
Download the latest version of JD-GUI in .deb package file and save it on your Downloads folder. In the terminal run below JD-GUI apt install command.
sudo apt install ./Downloads/jd-gui-1.6.6.deb
Here “jd-gui-1.6.6.deb” is the downloaded file name and path is Downloads folder. You can change above command based on your file name and path.