Hi,

I am not sure what you are trying to do, but I have some ideas for you.  If
a checkbox on the client is not checked on the client(web browser) it does
not send a value or even its name to the server.  If I have a lot of
checkboxes that are related to the same thing, I like to give them the same
name.  That sends all of their values in a list to the server.  You can use
request.getParamterValues to get the values.  Here is an example:

if (request.getParameterValues("myCheckBox") != null)
{
   String [] CheckboxVal = request.getParameterValues("myCheckBox");
   for (int i = 0; i < CheckboxVal.length; i++)
   {
   	out.println("I saw ["+ CheckboxVal[i] + "]");
   } 
}

I hope that helps.

Tosh

-----Original Message-----
From: ngngachuen@i... [mailto:ngngachuen@i...]
Sent: Wednesday, February 21, 2001 5:34 AM
To: Pro_JavaServer_Pages
Subject: [pro_jsp] help: compareTo(checkbox,"")==0 , not work


hi...

 i tried to check the checkbox whether it is checked or not by using the 
following code:
-------code-----------


int count= Integer.parseInt(request.getParameter("count"));
String[] icheck =new String[count];
int store =0;

for(i=0;i<count;i++){
    String checkbox= "checkbox"+i;
    String temp= request.getParameter(checkbox);
    if(temp.compareTo("")==0){
        System.out.println(i+" is null \n");
    }
    else {
       icheck[store]=temp;
       store++;
   }
}



-----------------------------------
but when i run it .  
the following error comes out : 
javax.servelet.ServletException ,  ,,,
java.lang.NullPointerException..

pls help me 
thx 
ngachuen