openjdk-6-source software package provides OpenJDK Development Kit (JDK) source files, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install openjdk-6-source
openjdk-6-source is installed in your system.
Make ensure the openjdk-6-source package were installed using the commands given below,
$ sudo dpkg-query -l | grep openjdk-6-source *
You will get with openjdk-6-source package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Development |
| Package | openjdk-6-source |
| Version | 6b40-1.13.12-0ubuntu0.14.04.2 |
| Description | OpenJDK Development Kit (JDK) source files |
| Sub Section | devel |