You are using the same name for the parameter to the constructor and the
instance variable for your inner class.
fillup
On 5/29/02 10:55 AM, "Mark Shurgot" <[EMAIL PROTECTED]> wrote:
> I am having the strangest problem with Tomcat and inner classes. In a few
> JSP pages, we use inner classes (beefed up structs) to store information
> retrieved from a database into a collection class (Vector).
>
> It seems that somewhere between getting the data from the result set and
> constructing and storing an instance of the (data holding) inner class in a
> Vector, the data is getting corrupted (doubles only).
>
> Example:
>
> ---- JSP -----
>
> <%!
> // inner class
> class SomeClass
> {
> public double dSomeDouble;
>
> public SomeClass(double dSomeDouble)
> {
> // label: point 2
> this.dSomeDouble = dSomeDouble;
> // some other data members
> }
> }
> %>
>
> <%
> // execute some query to get info, get results as JDBC ResultSet
> oResult
>
> Vector oVecResults = new Vector()
> double dDoubleVal = oResult.getDobule(1);
> // label: point 1 (dDobuleVal is intact)
>
> oVecResults.add(new SomeClass(dDoubleVal));
> // label: point 3
> %>
>
> ---- END JSP ----
>
> At "point 1" the values retrieved from the database are intact, and remain
> so until passed into the constructor of the inner class. At "point 2"
> dSomeDouble becomes corrupt (some random number out of memory), and remains
> so past "point 3".
>
> Added twist: This problem only occurs after a page has been hit 5 times (3
> times for larger pages). (1st time, Tomcat compiles the page, next four
> times the page is loaded in memory).
>
> Config: Apache Tomcat 4.0.1 (exact same problem found in Linux and Windows
> versions).
>
> Any ideas? Extracting the inner class from the page fixes the problem, but
> is not a desired solution. Any help is appreciated.
>
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