Datatable data binding seems useless

Question

I have the following inside of form tags
<h:commandButton value="submit" action="#{mybean.examinedata}"/>
<h:dataTable binding="#{mybean.data}" id="table1" value="#{mybean.loaddata}" var="payment">
<h:column>
     <h:outputText value="#{payment.title}"/>
</h:column>
</h:dataTable>
When the submit button is clicked and the action method mybean.examinedata is run how to I access the data stored in the data binding mybean.data ?

Answer 1

I now can access all rows by setting
mybean.setRowIndex(0); to the row I wish to access. The next problem I do not understand is how to access the column data.
where mybean.getrowdata() returns the row of data
where mybean.getrowdata().toString() returns
" {title=mytitle, transactionid=80820-92426} "
I have tried to cast the row data to a class
rowdata mydata = (rowdata) mybean.getrowdata();
where rowdata is
public class rowdata {
private String title;
private String transactionid;
public rowdata(String title,String transactionid){
this.title=title;
this.transactionid=transactionid;
also I have getter and setter for both title & transactionid
I get
javax.faces.el.EvaluationException: java.lang.ClassCastException
Thanks ...