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Dmitry Melekhov wrote:
> -----------------------------
> Please read the FAQ!
> <http://java.apache.org/faq/>
> -----------------------------
>
> I use JServ 1.0 with gnujsp 0.9.10.
>
> When I execute following jsp code:
> <%=request.getParameterValues("todo")[0]%>
> <%
> switch (sess.getState()) {
> case 0:{%>
> <a href="main.jsp?todo=list">NieniYae</a>
> <a href="main.jsp?todo=add">Aiaaaeou</a>
> <BR>
> <%}
>
> without parameter todo in url refs don't occure :(
> If parameter exists all works ok.
> Why? And how to get it working without parameter?
>
If you call this code without passing any values for the "todo"
parameter, you will get a null pointer exception from the first line.
The reason is that getParameterValues() will return null in that case.
You might want to change the first line to something like this:
<%
String todo = null;
String values[] = request.getParameterValues("todo");
if (values != null)
todo = values[0];
%>
and the todo string will either contain the first occurrence of this
parameter, or null if it was not specified.
>
> Dmitry Melekhov
> (aka 2:5050/11.23@fidonet)
> http://www.aspec.ru/~dm
>
Craig McClanahan
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