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Please help me this is for my graduation.

 
jurgen hallez
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(This message follows another message of Jurgen Hallez.)
Hello,
Thanks for the replies !! Hello to the one in Antwerp ! I live in Merksem.
I am sorry if I am not using the UBB code.
The problem is that I am studying commercial engineer. I don't know much about java and jsp programming. My graduation paper should be ready this thursday.
I am almost sure that the code is 99 % right. The only question I have is whether the method to count for the average of the salaries is correct and whether all the necessary methods in the home and remote interface are there. I am sorry that some of the code is in dutch. Therefore, I try to give a translation:
gemiddelde = average
naam = surname
voornaam = name
bereken = calculate
The calculate method calculates the average of the salaries.
The error I get is in the deloytool of the SDK J2EE 1.4. When I try to save the file, it says 'sax error, premature end of file'. Then the application closes and I can not reopen the application.
-------------
Another error I got with another aplication is the following. I get this error when I try to run the application in the browser.
HTTP Status 500 -
--------------------------------------------------------------------------------
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP
No Java compiler was found to compile the generated source for the JSP.
This can usually be solved by copying manually $JAVA_HOME/lib/tools.jar from the JDK
to the common/lib directory of the Tomcat server, followed by a Tomcat restart.
If using an alternate Java compiler, please check its installation and access path.
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:132)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:356)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:420)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:463)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:444)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:557)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:305)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:306)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:253)
javax.servlet.http.HttpServlet.service(HttpServlet.java:861)
sun.reflect.GeneratedMethodAccessor71.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:324)
org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:289)
java.security.AccessController.doPrivileged(Native Method)
javax.security.auth.Subject.doAsPrivileged(Subject.java:500)
org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:311)
org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:205)

note The full stack trace of the root cause is available in the Sun-Java-System/Application-Server-PE-8.0 logs.

--------------------------------------------------------------------------------
Sun-Java-System/Application-Server-PE-8.0
----------------------------------------------------------------------------
I can not find the solution suggested, because I can not find the installation directory of the tomcat server. I have installed the SDK J2EE 1.4. I guess this has its own web server, but I can not find the directory.
Thanks for all your time !! Appreciated !! I really hope I can finish this.
THANKS !!
 
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