Aglets-java.lang.UnsupportedClassVersionError:Unsupported major.minor versi

hi! I am doing project using aglets while i am following code i am getting error as shown below.pls help me.
import com.ibm.aglet.*;
public class CreatedAglet extends Aglet
public void onCreation(Object init)
System.out.println("createdAglet agent created");
public void run()
System.out.println("createdAglet running");
import com.ibm.aglet.*;
public class CreatingAglet extends Aglet
public void onCreation(Object init)
System.out.println("Agent Created");
public void run()
try
AgletContext context = this.getAgletContext();
context.createAglet(null,"CreatedAglet",null);
catch(Exception e)
System.out.println("Exception " + e);
Error :
Microsoft Windows XP [Version 5.1.2600]
java.lang.UnsupportedClassVersionError: CreatingAglet (Unsupported major.minor v
ersion 50.0)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:537)
at com.ibm.aglets.tahiti.AgletClassLoader.loadClassFromCodeBase(Unknown
Source)
at com.ibm.aglets.tahiti.AgletClassLoader.findClassInternal(Unknown Sour
ce)
at com.ibm.aglets.tahiti.AgletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at com.ibm.aglets.tahiti.ResourceManagerImpl.loadClass(Unknown Source)
at com.ibm.aglets.AgletContextImpl.createAglet(Unknown Source)
at com.ibm.aglets.AgletContextImpl.createAglet(Unknown Source)
at com.ibm.aglets.tahiti.MainWindow$TahitiEventHandler.perform(Unknown S
ource)
at com.ibm.aglets.tahiti.MainWindow$TahitiEventHandler.run(Unknown Sourc
e)
at java.lang.Thread.run(Thread.java:534)
When loading CreatingAglet from atp://system:4434/ : java.lang.UnsupportedClassV
ersionErrorCreatingAglet (Unsupported major.minor version 50.0)
java.lang.ClassNotFoundException: When loading CreatingAglet from atp://system:4
434/ : java.lang.UnsupportedClassVersionErrorCreatingAglet (Unsupported major.mi
nor version 50.0)
at com.ibm.aglets.tahiti.AgletClassLoader.loadClassFromCodeBase(Unknown
Source)
at com.ibm.aglets.tahiti.AgletClassLoader.findClassInternal(Unknown Sour
ce)
at com.ibm.aglets.tahiti.AgletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at com.ibm.aglets.tahiti.ResourceManagerImpl.loadClass(Unknown Source)
at com.ibm.aglets.AgletContextImpl.createAglet(Unknown Source)
at com.ibm.aglets.AgletContextImpl.createAglet(Unknown Source)
at com.ibm.aglets.tahiti.MainWindow$TahitiEventHandler.perform(Unknown S
ource)
at com.ibm.aglets.tahiti.MainWindow$TahitiEventHandler.run(Unknown Sourc
e)
at java.lang.Thread.run(Thread.java:534)

The error message says that you have a library that is too new for your JDK/VM.
Kaj

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I'm trying to import the substitution VO but encountered the following exception.
Would appreciate if anyone can shed some light on this. Thanks
java oracle.jrad.tools.xml.importer.JPXImporter $HISEM_TOP/mds/posummary.jpx -username apps -password apps -dbconnection "(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=hmdeverpdb)(PORT=1522))(CONNECT_DATA=(SID=pupg)))"
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/xml/sax/Locator (Unsupported major.minor version 48.0)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:493)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:11
1)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:248)
at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:286)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
at oracle.jrad.tools.xml.importer.JPXImporter.processJPXFile(JPXImporter
.java:254)
at oracle.jrad.tools.xml.importer.JPXImporter.main(JPXImporter.java:110)
Rgds
Ung

what is your JDK version ?
This error would come up if you try to load a class compiled in a more recent JDK version than the one in which it is running.
try using a more recent JDK version
Thanks
Tapash

Junit ,eclipse :java.lang.UnsupportedClassVersionError:

I have java 1.4.2_02,eclipse 3.2 and junit 4.3 versions. when I try to run a test case , encountring the following error can anyone explain the cause of this error
java.lang.UnsupportedClassVersionError: org/eclipse/jdt/internal/junit4/runner/JUnit4TestLoader (Unsupported major.minor version 49.0)
     at java.lang.ClassLoader.defineClass0(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:537)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:251)
     at java.net.URLClassLoader.access$100(URLClassLoader.java:55)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:194)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
     at java.lang.Class.forName0(Native Method)
     at java.lang.Class.forName(Class.java:141)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.loadTestLoaderClass(RemoteTestRunner.java:324)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.createRawTestLoader(RemoteTestRunner.java:314)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.createLoader(RemoteTestRunner.java:309)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.defaultInit(RemoteTestRunner.java:287)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.init(RemoteTestRunner.java:210)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:195)

So how can I run junit 3.8.1 with JRE 1.4.2 and eclipse 3.1?

Getting java.lang.UnsupportedClassVersionError error

Hi all,
I have implemented a module in struts here i am logging in by using the page login.jsp it contains two textboxes whenever i click on the button the action should go to next page that is display.jsp if the values are eaqual. For this i am checking whether the entered values are available in database or not after that only the action has to move display.jsp page
in struts-config.xml file i wrote
<form-bean name="ProjLoignForm" type="om.ProjLoginFB"/>
<action input="/userlogin.jsp" name="ProjLoignForm" path="/login"
   scope="request" type="action.ProjAction" validate="true">
   <forward name="success" path="/display.jsp"/>
   <forward name="failure" path="/userlogin.jsp"/>
</action>here om and action are packages.
Please help me why it is giving a error like
java.lang.UnsupportedClassVersionError: action/ProjAction (Unsupported major.minor version 49.0Thank you in advance..

Hi,
The class requires JDK/JRE 1.5 but you are probably executing with JDK/JRE 1.4
Kaj

Error (Unsupported major.minor version 49.0) in Servlet - Tomcat 4.1

Hello,
I have got below error when i have run web application with JSP,Servlet,beans:
I have used Tomacat 4.1, 5.0 and 5.9.No change ???
I am using j2sdk1.4.2_03 and j2re1.4.2_03.
This is the complete project i want to run in my PC
when i extract .war file and run on my PC it's generate below error :
This is urgent For me . PLEASE HELP
ERROR :
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Error allocating a servlet instance
     at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:672)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2422)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:163)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:199)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:828)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:700)
     at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:584)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
     at java.lang.Thread.run(Thread.java:536)
root cause
java.lang.UnsupportedClassVersionError: com/innovapark/soar/jsp/index_jsp (Unsupported major.minor version 49.0)
     at java.lang.ClassLoader.defineClass0(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:509)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
     at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1679)
     at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:968)
     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1409)
     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1289)
     at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:885)
     at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:668)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2422)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:163)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:199)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:828)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:700)
     at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:584)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
     at java.lang.Thread.run(Thread.java:536)
Apache Tomcat/4.1.30
Thank You
Neon

Solved
Just do these things.... If you initially complied your classes in jdk1.5 and if u r trying to run the same in 1.4.2 or other.. The already compiled classes will be expecting jdk 1.5 JRE for their runtime execution. So what u have to do is......
1.stop ur sever
2.delete the work directory in tomcat
3.Delete the work directory in your projects web-app Folder
4.Now cleann the project... Build... and Run Again ... . It should work...
if still it dont , i prefer use only jdk1.4.2 on system.. set enviorment variebles for it...Reinstall tomcat .. and do above mentioned steps ,,, This should solve the problem...
Message was edited by:
sunildm4u

What meanning java.lang.UnsupportedClassVersionError

Hi 9iAS team,
I have a servlet in jdev903 run is OK but to deploy 9iAS
903 ocour 500 Internal Server Error
java.lang.UnsupportedClassVersionError: request/Servlet2 (Unsupported major.minor version 48.0)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:488)
what meanning java.lang.UnsupportedClassVersionError...?

Hi,
You get this error when there is any incompatibility issues between the jdk installed on your system and the jdk required by iAS. Check iAS docs to find the jdk version suported by iAS.
The meaning of the error is explained [url http://java.sun.com/j2se/1.4.1/docs/api/java/lang/UnsupportedClassVersionError.html]here.
Regards,
Anupama

Exception in thread "main" java.lang.UnsupportedClassVersionError: ATMCaseS

Hi,
I received this error below when I run my very first java class file. Also, I also have Oracle 10.2.0.1 installed on my PC. Could someone advise what I need to do to fix it?
Thanks,
C:\examples\ch01\ATM>java ATMCaseStudy
Exception in thread "main" java.lang.UnsupportedClassVersionError: ATMCaseStudy
(Unsupported major.minor version 49.0)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:539)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
3)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:251)
at java.net.URLClassLoader.access$100(URLClassLoader.java:55)
at java.net.URLClassLoader$1.run(URLClassLoader.java:194)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)

Hi,
Have been having a similar problem. (With 1.6.0_14 and 1.6.0_16)
However making the single .java file into an .jar seems to fix the problem.

./asadmin gives - java.lang.UnsupportedClassVersionError:

I had facing problem to run the asadmin in my new server, it keep showing me an error as show in the attachment below. Can you please give advise on how to solve this problem as soon as possible, I really need to start my Sun One App server as soon as today. Thank you.
Actually I had migrate from the old server to a new server.
1. I had backup the /ext folder (which contains the sunone info) from the old server, and restore back to the new server.
2. I can start the web server.
3. When try to run the asadmin (/ext/sunone/s1as/asadmin), it give me an error.
root@test1 # ./asadmin
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/iplanet/ias/tools/cli/IasAdminMain (Unsupported major.minor version 48.0)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:486)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:111)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:248)
at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:297)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:286)
at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)
root@test1 #

Hi!
I had that exception too, and were because
the jdk version which I used to compile (jdk1.5) were
newer than the jdk version for the Sun App Server (jdk 1.4.2)
I solved it changing the jdk version for the compiler
I hope this can help you, good luck!!
Pilar

Aglets-java.lang.UnsupportedClassVersionError:Unsupported major.minor versi

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