title: java.lang.NumberFormatException: For input string: “”
body: <p>The question is duplicate but I can't find a proper solution so please help me out with this,</p>
  <p>I have to convert the credit card number(from edittext) to int.
  Credit card number like : &quot;3333 3333 3333 3333&quot;
  I removed white space using <code>String removeWhiteSpace = cardNumEt.getText().toString().replace(&quot; &quot;, &quot;&quot;);</code>
  Than converted to int like :</p>
  <pre><code>  try
              {
                  int nIntFromET = Integer.parseInt(removeWhiteSpace);
              }
              catch (NumberFormatException e)
              {
                 Log.e(&quot;exptn&quot;,e.toString());
              }
  </code></pre>
  <p>but unfortunately it's giving me exception :</p>
  <pre><code>java.lang.NumberFormatException: For input string: &quot;3333333333333333&quot;
  </code></pre>