invalid class file format.

[kiran chandra]

I have configered my jbulider9 to work with orcle9iAs.
I set up the working diretory to kchandra and when i am running the project,i am encountering the following error.could anyone help me out.
error: Invalid class file format in N:\JBuilder9\jdk1.4\jre\lib\rt.jar(java/rmi/NoSuchObjectException.class). The major.minor version '48.0' is too recent for this tool to understand.
Test_StatelessSessionBeanWrapper0.java:6: Class java.rmi.NoSuchObjectException not found in import.
import java.rmi.NoSuchObjectException;
^
error: Invalid class file format in N:\JBuilder9\jdk1.4\jre\lib\rt.jar(java/lang/Object.class). The major.minor version '48.0' is too recent for this tool to understand.
Test_StatelessSessionBeanWrapper0.java:0: Class java.lang.Object not found in class com.evermind.util.Link.
// DMS begins
^
4 errors
Error compiling N:\KChandra\Oracle\iSuites\oc4j2\j2ee\home\applications\tproj/test.jar: Syntax error in source
Warning: Error reading transaction-log file (/N:/KChandra/Oracle/iSuites/oc4j2/j2ee/home/persistence/transaction.state) for recovery: premature end of file
Forced or abrupt (crash etc) server shutdown detected, starting recovery process...
Recovery completed, 0 connections committed and 0 rolled back...
Auto-deploying file:/N:/KChandra/Oracle/iSuites/oc4j2/j2ee/home/applications/tproj/test_web/ (Assembly had been updated)...
Oracle9iAS (9.0.2.0.0) Containers for J2EE initialized