NumberFormatException: For input string: ""
<p>I am getting this error for my program. I am new to java so can any one guide me on this.</p>

<pre><code>java.lang.NumberFormatException: For input string: ""
 at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
 at java.lang.Integer.parseInt(Integer.java:470)
 at java.lang.Integer.parseInt(Integer.java:499)
 at data.connect(data.java:322)
 at data.&lt;init&gt;(data.java:78)
 at data.main(data.java:561)
</code></pre>
