arraylist to integer array

[monika]

Hello,


I am extracting some data from database(which is a integer field in the database) and I am storing that data into a arraylist.
Now I want to find to find some further operation I want to store it in a integer array---

But when I am trying to so I am getting a error message.I have done all this in a JSp page

java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Integer


<% ArrayList ar=new ArrayList(); %>
<% while(rs.next()) { %>

<%


String strprodvalue = rs.getString("first");
out.println(strprodvalue);
ar.add(strprodvalue);
//int[] ints=new int[ar.size()];

%>

<BR>
<%
}
%>


<%

Object ia[] = ar.toArray(); //get array
int sum = 0;
for(int i=0; i<ia.length; i++)
{
sum+=((Integer)ia[i]).intValue();

}

out.println("Sum is :" + sum);

%>


Can you please help me how to convert arraylist into a integer array

[Tolls]

For starters don't do that in a JSP.

If the data coming from the db is an integer, why are you using getString() and not getInt()?

[monika]

Thank you for your help.

Can you please suggest me how can I write this method in classes instead of JSP and how can I access that?

Thank You

[Tolls]

Write Java?
I'm sorry, but that seems a bit of an odd question.
I presume you learnt Java before moving onto JSPs.