Class cast exception in jsp plz help

i have written a jsp where i displayed a text box with value given by user inside it
when the user enters some other value in text box and clicks on update button then i forwarded reqeust to servlet which will some data base work
servlet will forward again to the same jsp with the new value in text box.
but i am getting CLASS CAST EXCEPTION when servlet is forwarding reqeust to same JSP
help me what to do ........
thanking you in advance ..cheers

display cart.jsp file:
<%@ page import="java.util.*,org.*" %>
<html>
<body>
<%
Vector cartupdate = (Vector)session.getAttribute("cartlist");
for (int i = 0; i < cartupdate.size(); i++) {
CartListBean clb = (CartListBean)cartupdate.elementAt(i);
%>
<form name="itemslist<%=i%>" action="updateCart" method="post">
<input type="hidden" name="itemcode" value="<%=clb.getItemCode()%>">
     <input type="hidden" name="itemname" value="<%= clb.getItemName()%>">
<input type="hidden" name="price" value="<%= clb.getPrice()%>">
<%= clb.getItemName() %>
<input type="text" name="qty" value="<%=clb.getQuantity()%>">
<input type="submit" name="<%=clb.getItemCode()%>" value="update">
</form>
<br>
<%
%>
<form name="tobuy" action="buysrv" method="post">
<input type="submit" name="buy" value="BUY">
</form>
</body>
</html>
updatecart servlet code:
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import org.*;
import java.sql.*;
import java.util.*;
public class UpdateCart extends HttpServlet
public void service(HttpServletRequest request,HttpServletResponse response) throws IOException,ServletException
HttpSession session=request.getSession(false);
Vector cartupdate = (Vector)session.getAttribute("cartlist");
for (int i = 0; i < cartupdate.size(); i++) {
org.CartListBean cart = (org.CartListBean)cartupdate.elementAt(i);
if((cart.getItemCode()).equals(request.getParameter("itemcode")))
org.CartListBean clb=new org.CartListBean();
clb.setItemCode(request.getParameter("itemcode"));
     clb.setQuantity(request.getParameter("qty"));
     clb.setItemName(request.getParameter("itemname"));
clb.setPrice(request.getParameter("price"));
cartupdate.setElementAt(clb,i);
session.setAttribute("cartlist",cart);
ServletContext application=getServletContext();
System.out.println("got finished");
          RequestDispatcher rd=application.getRequestDispatcher("/displaycart.jsp");
               rd.forward(request,response);
Message was edited by:
143java

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     at java.lang.reflect.Method.invoke(Method.java:597)
     ... 44 more
Any help will be highly appreciated.
Thanks in advance.
Anup

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          Thanks in advance,
          Dharma
          public void doGet(HttpServletRequest req, HttpServletResponse resp)
               throws ServletException, IOException
                    resp.setContentType("text/html");
                    PrintWriter out = new PrintWriter(resp.getOutputStream());
          try
          Context context=getInitialContext();
          Object reference=context.lookup("ArlProjContractorAppletSession");
          ArlProjContractorAppletSessionHome home=(ArlProjContractorAppletSessionHome)PortableRemoteObject.narrow(reference,ArlProjContractorAppletSessionHome.class);
          //Exception is occuring in the above statement. It is unable
          //to cast to the home interface
                    ArlProjContractorAppletSession the_ejb=null;
          try
          the_ejb=home.create();
          System.out.println("the_ejb = " + the_ejb.toString());
          catch(Exception e)
          e.printStackTrace();
          catch(Exception e)
          e.printStackTrace();
                    // to do: code goes here.
                    out.println("<HTML>");
                    out.println("<HEAD><TITLE>Contractor TimeTracker</TITLE></HEAD>");
                    out.println("<BODY>");
                    // to do: your HTML goes here.
                    out.println("</BODY>");
                    out.println("</HTML>");
                    out.close();


          I came across this kind of problem once. My problem went away after I upgraded
          from 5.1 SP6 to 5.1 SP8.
          "Dharma" <[email protected]> wrote:
          >
          >Hi,
          >
          >I am working on J2EE applications.I am using Webgain studio and weblogic
          >server.I
          >got a problem while invoking EJB from the servlet.
          >
          >While calling an EJB from the servlet, it is giving that "Class Cast
          >Exception".This
          >is because, the remote home reference is not able to type casted to the"Home
          >Interface"
          >of the EJB, even if I type casted explicitly. It is creating the context
          >and able
          >to identify the EJB with the JNDI name.
          >
          >Could please help me in solving this problem.I am pasting the code here.
          >
          >Thanks in advance,
          >Dharma
          >
          >
          >public void doGet(HttpServletRequest req, HttpServletResponse resp)
          >     throws ServletException, IOException
          >     {
          >          resp.setContentType("text/html");
          >          PrintWriter out = new PrintWriter(resp.getOutputStream());
          >
          > try
          > {
          >
          > Context context=getInitialContext();
          >
          > Object reference=context.lookup("ArlProjContractorAppletSession");
          >
          > ArlProjContractorAppletSessionHome home=(ArlProjContractorAppletSessionHome)PortableRemoteObject.narrow(reference,ArlProjContractorAppletSessionHome.class);
          >
          >//Exception is occuring in the above statement. It is unable
          >//to cast to the home interface
          >
          >          ArlProjContractorAppletSession the_ejb=null;
          >
          > try
          > {
          > the_ejb=home.create();
          >
          > System.out.println("the_ejb = " + the_ejb.toString());
          >
          > }
          > catch(Exception e)
          > {
          > e.printStackTrace();
          > }
          > }
          > catch(Exception e)
          > {
          > e.printStackTrace();
          > }
          >          // to do: code goes here.
          >
          >          out.println("<HTML>");
          >          out.println("<HEAD><TITLE>Contractor TimeTracker</TITLE></HEAD>");
          >          out.println("<BODY>");
          >
          >          // to do: your HTML goes here.
          >
          >          out.println("</BODY>");
          >          out.println("</HTML>");
          >          out.close();
          >     }
          >
          >
          >
          >
          >

Class Cast Exception in a custom adapter processing module

Hi,
I am trying to create a Custom adapter module in my file adapter as a Local enterprise Bean.
I have taken the "ConvertCRLFfromToLF" sample given by SAP as a reference, created an EJB module project, and deployed the enterprise archive to the J2EE engine.
However, i am getting a Class Cast Exception in the Adapter Engine for my communication channel.
Any help on this will much appreciated.
Thanks & Regards,
Renjith.

HI,
Managed to solve this..this was due to the additional jars which was included by the Developer Studio in the EAR file. We have to remoce the jars from the EAR, change the application.xml and sap_manifest.mf files to give reference to the jars already deployed in the J2EE engine.
Thanks & Regards,
Renjith

(Class cast Exception)Problem while loading data fro database in java class

Dear all,
Please help me...to solve this
I have a database having two columns of String and Date Types.
In my java code i was trying to load the data to a UI.
I am successfull in loading the String type value.
But while loading date field value,is showing Class cast Exception.
What i am doing is Getting the values from database to a String[] array.
So my question is how to
get the Date field as date field itself,Then convert it to a String..Then put it in to String[] array...
Any body please help...If any one want more clarification in question i will give......

Hi,
I am using GWT to display my data in a Grid.
So it will accept a Single two dimensional String array....Here i have one as String and other as Date.
So i was trying to get each row in a sindle dimensional array array[] then store it in a list.
Iteration goes up to 10 rows.After i am setting it in to a list
ie list.add(array);
Now while returning this list i am doing this
"return (String[][])list.toArray(new String[0][]);"
When i tried to get the date element to String array it is showing class cast exception. When i tried with toString() method it is showing the same problem.

Class cast exception in Process Control

Hello,
I am trying to use a SubProcess through a Process Control from a ParentProcess in another Workshop application.
They are both deployed in the same domain.
The SubProcess Control is packaged in a Control Project whose jar is imported in the other ParentProcess Workshop application.
The data that is passed is in form of XML documents described as schemas. And both applications use the same Schema.jar.
The call from the ParentProcess looks like it is OK.
But when the reply comes back it looks like the transform fails. I get a "class cast exception"
The feeling I get is that the returning xml document variable can't be cast into the local xml document variable. Even though they are of the exact same type...
All help is very much appreciated!!!
Unhandled Process Exception:
java.lang.ClassCastException
at se.telia.object.kund.control.sokKundPControl.clientRequest(Unknown Source)
at se.telia.tab.regae.process.Untitled.sokKundPctrlClientRequest(Untitled.jpd:101)
-------------

I'm having some problems with a transformation and I'm getting a cast exception so maybe it's the same thing.
The problem is when the source schema has some element with minOccurs="0". If the element is not present in the xml document that is received, the transformation seems to be trying to cast it anyway.

Class Cast exception in ArrayDescriptor.createDescriptor(

I want to pass an array into a an Oracle procedure called using a callableSatement.
When I create the array descriptor i get an class cast exception. I believe this error occurs when the sun.jdbc.odbc.JdbcOdbcConnection
or the weblogic.jdbc.wrapper.PoolConnection_weblogic_jdbc_oci_Connection connection object is being cast to oracle.jdbc.driver.OracleConnection by createDescriptor method how can i overcome this run time error????

Welcome to the forum!
>
am trying to pass ArrayList to Oracle procedure
but when i am excuting the code i got the following error
java.lang.ClassCastException: com.ibm.ws.rsadapter.jdbc.WSJdbcConnection incompatible with oracle.jdbc.OracleConnection
Can anybody help me to resolve this problem.
>
Not if you don't provide the code you are using so we can see what it is doing. Also post your 4 digit Oracle version, Java version, JDBC jar file name/version and the procedure signature that shows the language, parameters and types.
An ArrayList is a Java object so are you using a Java stored procedure?
Or are you using WebSphere? If WebSphere see this IBM link which appears to apply to the problem you are describing.
http://www-01.ibm.com/support/docview.wss?uid=swg21409335

Class Cast exception in Servlet...

hello guys, hope you can help...i am trying to build an application where data are exchanged between pages....form data are retrieved and sent to Servlet1,
in Servglet1..i have
String name=(String)request.getParameter("username");
then that variable was added to the user seesion using..session.setAttribute("user",name);
so in the current servlet(Servlet2), i am simply trying to retrieve it with..
String usr=(String)session.getAttribute("user");
but i still get a Class Cast exception....i really cant work out why...
here is the stack strace...
java.lang.ClassCastException: CheckUpdate$User
at UpdateServlet.doPost(UpdateServlet.java:59)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
at CheckUpdate.doPost(CheckUpdate.java:136)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
thanks

I'm really doubting that the value retrieval is the actual cause of the problem.
UpdateServlet.java:59What does line 59 of that servlet contain?

Type problem - Class Cast Exception - trying to understand

hello,
i get a Class cast exception in the following code.
interface Foo {}
class Alpha implements Foo {}
class Beta extends Alpha {}
class Delta extends Beta {
public static void main( String[] args ) {
Beta x = new Beta();
Beta b = (Beta)(Alpha)x; //fine
Foo f = (Delta)x; //CCE
Object ob = new Object();
String s = new String();
ob = s; //fine, no need of case
s = (String)ob; //needs a castI was just thinking, implicitly Delta and Beta both of them IS-A Foo, and assigning x to a type foo shouldnt be a problem(while making it refer to the Delta class) so, what could cause the CCE ?
I would appreciate if someone could please help me understand this.
Rgds

Hi.
Assigning your "x" to a variable typed Foo is not a problem. The problem is that you are trying to cast an instance of Beta ("x") into type Delta which is not possible. Every Delta is a Beta, but not every Beta will be a Delta!
Simple as that.
Bye.

Remote Class cast Exception

Greetings,
I took my first steps into the RMI world. I managed to get a tutorial example working. Now I did my own RMI system, but I can`t get rid of this problem.
- rmiregistry is running OK
- my RMIServer is running OK
but my RMIClient Throws: java.lang.ClassCastExceptionI took a closer look at the Object I receive on the client side, and it was:
DBManager_Stub[RemoteStub [ref: [endpoint:[ ... [/b]
Here are the code snippets:
public interface DefaultDBManager extends java.rmi.Remote
public class DBManager implements DefaultDBManagerIn my RMIServer:
LocateRegistry.createRegistry(PORT);
DefaultDBManager DB_MANAGER = new DBManager();
UnicastRemoteObject.exportObject(((DefaultDBManager)DB_MANAGER));
Naming.rebind(URL,DB_MANAGER);and in the client code:
DBManager DB_MANAGER = (DBManager)Naming.lookup(URL);But the client code Throws Class cast Exception.
What is it I`m not seeing here?
Help appreciated,
Eki

and in the client code:
DBManager DB_MANAGER = (DBManager)Naming.lookup(URL);You should be casting to the interface not the impl class.
DefaultDBManager DB_MANAGER = (DefaultDBManager)Naming.lookup(URL);

Class cast exception in jsp plz help

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