J2SE 1.4rc works with 9ias preview 2?

I got this error message when run the example in oc4j:
do u know why?
500 Internal Server Error
OracleJSP: oracle.jsp.provider.JspCompileException:
Errors compiling:C:\oracle\ora90\j2ee\home\application-deployments\default\defaultWebApp\temp\_pages\_examples\_jsp\_num\_numguess.java
error: Invalid class file format in C:\Program Files\Java\j2re1.4.0-rc\lib\rt.jar(java/lang/Object.class). The major.minor version '48.0' is too recent for this tool to understand.
C:\oracle\ora90\j2ee\home\application-deployments\default\defaultWebApp\temp\_pages\_examples\_jsp\_num\_numguess.java:0: Class java.lang.Object not found in class com.orionserver.http.OrionHttpJspPage.
package examples.jsp._num;
^
2 errors

Please look at thread http://forums.oracle.com/forums/message.jsp?id=767439. There have been some
core package changes in 1.4. Also, you may have better luck finding answers to JSP and OC4J questions in the
J2EE forum.
Hope this helps.
later -- Jeff
I got this error message when run the example in oc4j:
do u know why?
500 Internal Server Error
OracleJSP: oracle.jsp.provider.JspCompileException:
Errors compiling:C:\oracle\ora90\j2ee\home\application-deployments\default\defaultWebApp\temp\_pages\_examples\_jsp\_num\_numguess.java
error: Invalid class file format in C:\Program Files\Java\j2re1.4.0-rc\lib\rt.jar(java/lang/Object.class). The major.minor version '48.0' is too recent for this tool to understand.
C:\oracle\ora90\j2ee\home\application-deployments\default\defaultWebApp\temp\_pages\_examples\_jsp\_num\_numguess.java:0: Class java.lang.Object not found in class com.orionserver.http.OrionHttpJspPage.
package examples.jsp._num;
^
2 errors

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