title: Convert String to Integer/Float/Double
body: <p>I am trying to convert a string to <code>Integer/Float/Double</code> but I got a <code>NumberFormatException</code>.</p>
  
  <p>My String is <code>37,78584</code>, Now I am converting this to any of them I got <code>NumberFormatException</code>.</p>
  
  <p>How can I convert this <code>string</code> to any of them.</p>
  
  <p>Please help me to get out of this problem.</p>