title: Inverse of a matrix in java
body: <p>I would like to calculate an inverse of matrix in java. Are there any already existing packages which calculate inverse of matrix. I found similar <a href="https://stackoverflow.com/questions/1992638/java-inverse-matrix-calculation">question</a>, but the answers in the questions are not so strongly recommending to use anyof the packages. Even i could not follow the method they are using. I have a large matrix of 10000s of rows and columns. I would
  like to calculate inverse of it.</p>