Call Jama Matrix from jython.

use_jama_with_jython

$ ./bin/jython 
Jython 2.7.0 (default:9987c746f838, Apr 29 2015, 02:25:11) 
[Java HotSpot(TM) 64-Bit Server VM (Oracle Corporation)] on java1.7.0_60
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path.append('Jama-1.0.3.jar')
>>> from Jama import Matrix
>>> array = [[1,2,3],[4,5,6],[7,8,9]]
>>> A = Matrix(array)
>>> b = Matrix.random(3,1)
>>> A.set(0,0,81)
>>> A.solve(b).print(5,2)

  -0.02
  -2.01
   1.84