Can't Save Session if Field is a Double

[scripter73]

Hi,

Relatively new to Java. Can someone explain why I can't do the following? I have a function that grabs a database element called getCustId(). The function returns a double.

Here's what I want to say:
* Custdata is my database object.

HttpSession s = request.getSession();
s.setAttribute("custid",custdata.getCustId());
.....

s.getAttribute(session.getAttribute("custid"));


I get the following error:



Generated servlet error:
[javac] Compiling 1 source file

C:\Tomcat 5.0\work\Catalina\localhost\cust-webapp\org\apache\jsp\loginProcess_jsp.java:110: setAttribute(java.lang.String,java.lang.Object) in javax.servlet.http.HttpSession cannot be applied to (java.lang.String,double)
s.setAttribute("custid",userdata.getCustId());
^
1 error


Is there some sort of "mask" I can use?

Thanks in advance.

scripter73


Change Your Thinking, Change Your Life.

 

[sedj]

Because the method setSession takes a signature of (String, Object) - and a double is a primitive data type.

Try this :

HttpSession s = request.getSession();
s.setAttribute("custid",new Double(custdata.getCustId()));
.....

Object o = s.getAttribute("custid");
double d = 0.0d;
if (o != null) {
  d = ((Double)o).doubleValue();
}

 

[scripter73]

Thanks, sedj,

I'd like to try this out, but this looks like it is for retrieving the session variable, but how do I put the double into the session var? I get an error when I try to:


s.setAttribute("custid",userdata.getCustId());

Then, can I use what you have above?

Thanks,
scripter73




Change Your Thinking, Change Your Life.

 

[scripter73]

Alert! Alert!

Hey sedj,

I didn't see that you had modified my code to:

s.setAttribute("custid",new Double(custdata.getCustId()));

I make the updates you suggested, and got past the error.

Works great!

Thanks again.

Sorry for the misunderstanding.

scripter73


Change Your Thinking, Change Your Life.