jblas software package provides fast linear algebra library for Java, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install jblas
jblas is installed in your system.
Make ensure the jblas package were installed using the commands given below,
$ sudo dpkg-query -l | grep jblas *
You will get with jblas package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Science |
| Package | jblas |
| Version | 1.2.3-6 |
| Description | fast linear algebra library for Java |
| Sub Section | Science |