Java.lang.instrument -- agent is loaded too late

Question

I'm playing around with a ClassFileTransformer in JDK 1.5 on Windows. I've got everything hooked up so that my premain method is called, allowing me to add a ClassFileTransformer.
The problem is that by the time this happens, many of the system classes have already been loaded... classes like java.lang.String and java.lang.Integer. Is there any way to get my transformer hooked up earlier so that I have a shot at transforming those system classes? (RedefineClasses won't work -- I'd really like to add a field and a method to some of the classes.)
Thanks,
--Dan                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

Answer 1

I thank for your's idea.
But, I think that your's solve is not true.
Because, I try set the name very short, but when I run(bug) application , then I meet this error again.
please help me!
This is detail errors:
Target URL -- http://127.0.0.1:7101/Ap/faces/untitled1.jspx
Aug 14, 2009 2:23:44 PM oracle.adfinternal.view.faces.activedata.SessionDataUpdateManager __getPageDataUpdateManager
SEVERE: cannot register active data when window has no name
<Aug 14, 2009 2:23:50 PM ICT> <Error> <HTTP> <BEA-101017> <[weblogic.servlet.internal.WebAppServletContext@fcb317 - appName: 'Application3', name: 'Ap', context-path: '/Ap', spec-version: '2.5', request: weblogic.servlet.internal.ServletRequestImpl@3d9a08[
GET /Ap/faces/untitled1.jspx HTTP/1.1
Accept: */*
Accept-Language: en-us
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)
Connection: Keep-Alive
Cookie: oracle.uix=0^^GMT+7:00
]] Root cause of ServletException.
java.lang.InternalError: name is too long to represent
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
     at weblogic.utils.classloaders.GenericClassLoader.defineClass(GenericClassLoader.java:335)
     at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:288)
     Truncated. see log file for complete stacktrace
>