gcj-4.8-source software package provides GCJ java sources for use in IDEs like eclipse and netbeans, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gcj-4.8-source
gcj-4.8-source is installed in your system.
Make ensure the gcj-4.8-source package were installed using the commands given below,
$ sudo dpkg-query -l | grep gcj-4.8-source *
You will get with gcj-4.8-source package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Java |
| Package | gcj-4.8-source |
| Version | 4.8.5-4ubuntu2 |
| Description | GCJ java sources for use in IDEs like eclipse and netbeans |
| Sub Section | Java |