MathGroup Archive 2006

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: JLink class is loaded but cannot be found?

  • To: mathgroup at
  • Subject: [mg66560] Re: JLink class is loaded but cannot be found?
  • From: wbogorad at
  • Date: Sat, 20 May 2006 04:47:02 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

The problem is solved.
According to Todd Gayley 
"The problem you are having is a subtle classloading problem. The JDBC DriverManager uses a rather unfortunate scheme for locating driver classes. The DriverManager only sees classes that are loaded by the same classloader that loaded the DriverManager class itself. When using J/Link, the DriverManager class is loaded by the system classloader (because it is a built-in part of Java), but the driver class is loaded by the JLinkClassLoader (because it is found via the classpath). Although there is another way around this, an easy thing to do is to put the ojdbc14.jar file into the Java runtime's "extensions" directory, which is <mathematica dir>/SystemFiles/Java/Windows/lib/ext. Then it will be found by the DriverManager and you won't need to use AddToClassPath or any other classpath-related tweaks."

I've followed his recommendations and it resolved the issue.
Thanks, Todd

Link to the forum page for this post:
Posted through [[postId=10494]]

  • Prev by Date: stytax error
  • Next by Date: Re: What's wrong with Integrate [ 1/x, {x,1,Infinity}]?
  • Previous by thread: Re: stytax error
  • Next by thread: Bugs--Limit bug in version 5+ ?