javahelp2 software package provides Java based help system, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install javahelp2
javahelp2 is installed in your system.
Make ensure the javahelp2 package were installed using the commands given below,
$ sudo dpkg-query -l | grep javahelp2 *
You will get with javahelp2 package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Java |
| Package | javahelp2 |
| Version | 2.0.05.ds1-7 |
| Description | Java based help system |
| Sub Section | Java |