title: How to store table or matrix in Java?
body: <p>I used to use matrix in octave to store data from data set, in Java how can I do that? Assume I have 10-20 columns and large data, I don't think </p>
  
  <pre><code>int [][]data; 
  </code></pre>
  
  <p>would be the best option. Is nested map the only solution?</p>