Error on converting Datatype to INT in JSP

Question

I recieved Data from a form via POST/GET method in a page. Now, by default, JSP takes that as string. I wanted to convert it to int and tried but it not worked.

My JSP Code for this is:

String editstr=request.getParameter("some_thing");
int edit;
edit=Integer.parseInt(editstr)

I also tried something like

int edit=Integer.parseInt(editstr)

Neither Works

score 1 · Answer 1 · answered Aug 20 '12 at 11:33

1

Do you get NumberFormatException or NullPointerException?

If not then look for an trouble in setting and getting the parameter some_thing.

answered Aug 20 '12 at 11:33

kapandron

3,546
2
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score 1 · Accepted Answer · edited May 23 '17 at 11:56

1

You must have to test the parameter whether it is null or not.

String editstr=request.getParameter("some_thing");
int edit=0;
if(editstr!=null){
   try{
     edit=Integer.parseInt(editstr);
   }catch(Exception ex) { 
     out.println(ex);
   }
}

PS: You should have to learn/use JSTL to avoid Java code in JSPs.

edited May 23 '17 at 11:56

Community

1
1

answered Aug 20 '12 at 11:37

KV Prajapati

93,659
19
148
186

Error on converting Datatype to INT in JSP

2 Answers2