upload excel file validation in java
<p>i am new for upload Excel file POI API so i need to validate duplicate cell in particular column . example like </p>

<pre><code>String dupcolumn  = myRow.getcell(0);
Iterator iter = new Iterator();
while(iter.hesnext())
{
myRow = (Row) iter.next();

dupcolumn.contains(iter.toString());


}
</code></pre>

<p>Above code cannot support to read in particular column , but always continuous reading column .</p>
