Am I missing something?

Blitzkrieger

Nothing ever seems to work with Java! I mean this thing :

java.lang.UnsupportedOperationException
at sun.jdbc.odbc.JdbcOdbcStatement.addBatch(JdbcOdbcStatement.java:898)

is probably due to the DBMS and SQL version ****e, but this really gets on my goat :

shortlist.java:145: Method getAttribute(java.lang.String) not found in interface
javax.servlet.http.HttpSession.
type = session.getAttribute(name).toString();

In my Java book, on the Java website and in the examples that came with the Tomcat server, HTTPSession has methods :

getAttribute()
setAttribute()
removeAttribute()
getAttributeNames()
etc.

but they just don't seem to be in the HTTPSession class. I've been having this problem constantly with Java - methods just not available in the classes the tutorials/libraries list them. Am I missing something here?

Enygma

java.lang.UnsupportedOperationException
at sun.jdbc.odbc.JdbcOdbcStatement.addBatch(JdbcOdbcStatement.java:898)

Yeah prolly something to do with software versions, get the latest driver for your DBMS. Does your DBMS support batch operations?

The session problem might be due to the fact that you're using an older version of the Servlet API. What version of Tomcat are you running?
Try session.getParameter(String s);

Although, you must have used session.setAttribute() at some stage right? If that worked then I don't know what the problem is.

lynchie

getAttribute(java.lang.String) was only introduced in the Servlet API version 2.2 and above. If you are using Tomcat 3 you are probably using the older version of the Servlet API. Your book must be quite new so it is using the new Spec. Download Tomcat 4.01

Blitzkrieger

Thanks for the advice but no joy

HTTPSession.java does seem to have all the right methods in it but I still get that error.

shortlist.java:81: Method getAttributeNames() not found in interface javax.servl
et.http.HttpSession.
Enumeration names = session.getAttributeNames();
^
shortlist.java:85: Method getAttribute(java.lang.String) not found in interface
javax.servlet.http.HttpSession.
name = session.getAttribute(type).toString();
^
shortlist.java:103: Method setAttribute(java.lang.String, java.lang.String) not
found in interface javax.servlet.http.HttpSession.
session.setAttribute(specific, model);
^
shortlist.java:117: Method getAttributeNames() not found in interface javax.serv
let.http.HttpSession.
Enumeration names = session.getAttributeNames();
^
shortlist.java:121: Method getAttribute(java.lang.String) not found in interface
javax.servlet.http.HttpSession.
name = session.getAttribute(type).toString();
^
shortlist.java:129: Method removeAttribute(java.lang.String) not found in interf
ace javax.servlet.http.HttpSession.
session.removeAttribute(type);
^
shortlist.java:141: Method getAttributeNames() not found in interface javax.serv
let.http.HttpSession.
Enumeration names = session.getAttributeNames();
^
shortlist.java:145: Method getAttribute(java.lang.String) not found in interface
javax.servlet.http.HttpSession.
name = session.getAttribute(type).toString();
^
8 errors

All those methods are listed but don't show up

bonkey

Are you sure you have the right path and classpath - that youre not importing an older version? Do you have multiple versions of these libraries (and Java itself) installed?

jc

Blitzkrieger

I do have multiple installations but I replaced them all with the new version. Everything else is in a backup dir and shouldn't be accessed.