error after installing java 1.4

Hello,
I have a problem.
I just have installed java sdk1.4.0 for windows and when I want to run my application I have this error:
Error: (0) initialization error: class Error const *: class file has wrong version 48.0, should be 45.3 or 46.0.
and nothing else. It's a new error because I didn't have this one under 1.2.
Can you help me please ?
Thanks.
(sorry for my language)

I have not come across this error before but it sounds as though a previous installation of the Java runtime is getting muddled up with the new. The message seems to relate to a C++ class rather than a Java class so it occurs during loading of the JRE and not your application.
I suggest you uninstall SDK 1.4 and reinstall it again. Make sure you install it in a separate directory from any previous versions of the SDK that you have. Also ensure that you have the path to the bin directory for the SDK defined in your PATH, and that you remove any paths to other versions of the SDK that you have installed.

Are you using JBuilder 5?

http://radweb.borland.com/codecentral/ccweb.exe/listing?id=16881

There is a 'hack' that someone reported would work, but it involved writing a script to go through all the class files and change the version number to something that Borland's compiler would like. This is probably against someone's license, and besides that, this 'fix' would not give you asserts keyword support.

thanks I will try