title: Java API to convert Array to CSV
body: <p>Suppose I have an array of int, float, string etc. Is there any utility API (e.g. Commons, Guava) that will give me a comma separated string? </p>
  
  <p>Like so,</p>
  
  <pre><code>int[] a = {1,2,3,4,5}. 
  String s = magicAPI.getCSV(a); // s == "1,2,3,4,5";
  </code></pre>