Parsing of text in JSP

Question

hai, I am new to java and I wanna know how can i parse a text using StringTokenizer and then add them all(integers). I tried this but doesnt work.plz help.
<% int sum[];
try{
if(request.getParameter("result").indexOf("+")>=0){
StringTokenizer st=new StringTokenizer(request.getParameter("result"), "+");
while(st.hasMoreTokens()){
sum=Integer.parseInt(st.nextElement());
}}catch(Exception e){}
%>
appreciate ur help
qs

Answer 1

Hi
Since you are using '+' as a delimiter my guess is that in your request URL you have gien: '?result=19+10'
The problem with this is that the browser formats data that it sends to a server from a form in a similar fashion in that it puts a '+' for a blank space between values, So when the server interprets this it takes the '+' and inserts a blank space betweeen the values so if you provide result=8+9 then the servlet receives 8 9.....This gives you a NumberFormatException when trying to parse the Token. Instead try giving :
http://server-name:port-number/servlet-name?result=19,10
and in your servlet code put:
StringTokenizer tokens = new StringTokenizer(param,",");
This should work...
Keep me posted on your progress.
Good Luck!
Eshwar Rao
Developer Technical Support
Sun microsystems Inc.
http://www.sun.com/developers/support