title: Creating two Dimensional array with existing arrays in java
body: <p>I have four arrays of strings and I would like to create a two dimensional array of 3 columns and dynamic rows.</p>
  
  <p>the arrays are like:</p>
  
  <pre><code>String[] first_name;
  String[] last_name;
  String[] unit;
  String[] phone_number;
  
  
  Object[][] obj = new Object[first_name.length()][3]
  </code></pre>
  
  <p>My problem is how do I achieve something like this:</p>
  
  <pre><code>obj = {first_name[index] + " " + last_name[index], unit[index], phone_number[index]}
  </code></pre>
  
  <p>Please help out!!!</p>