Java.lang.ClassCastException: java.lang.Short

It(He,She) gives me the exception java.lang. ClassCastException: java.lang. Short, the complete code is:
java.lang.ClassCastException: java.lang.Short
inventBD.EquipoBD.ConsultarEquipo(EquipoBD.java:36)
In the line 36 what I have is:
nuevo_equipo.setPart((Integer)traRes.getObject(4));
The information that I spend(pass) this one to him(her) declared as an integer.
Which can be the problem? Something on having done the casting?

It(He,She) it
gives me the exception java.lang.
ClassCastException: java.lang. Short,So what does the API say this means? Ever bothered to have a look?
the complete
code is:
java.lang.ClassCastException: java.lang.Short
inventBD.EquipoBD.ConsultarEquipo(EquipoBD.java:36)
In the line 36 what I have is:
nuevo_equipo.setPart((Integer)traRes.getObject(4));
The information that I spend(pass) this one to
him(her) declared as an integer.You cast it to Integer. But it's a Short.

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Java.lang.NullPointerException throwed when doing Hibernate Persistence

Im using Hibernate3.
I am trying to add a record of "orderdetail", also setting its many-2-one association "order", which include a many-2-one association with "employer".
Mycode is:
public class OrderdetailDaoTest {
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      // TODO Auto-generated method stub
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         Orders order = (Orders)orderdao.getOrderByid(orderid);
         vo.setOrders(order);
         IEmployeesDAO eedao = new EmployeesDAO();
         Integer eeid = new Integer("1");
         Employees employee = eedao.getEmployeeByid(eeid);
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         Calendar startdate = Calendar.getInstance();
         startdate.set(2007, 5, 15);
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         vo.setStartDate(startdate.getTime());
         Calendar enddate = Calendar.getInstance();
         startdate.set(2007, 6, 15);
         //System.out.println("time is "+enddate.getTime());
         vo.setEndDate(enddate.getTime());
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         vo.setRepatStatus("Other");
         vo.setTransferStatus("Named Transfer");
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Exception in thread "main" java.lang.NullPointerException
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   at com.farm.vo.Orders.hashCode(Orders.java:168)
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   at java.util.HashSet.add(Unknown Source)
   at java.util.AbstractCollection.addAll(Unknown Source)
   at org.hibernate.collection.PersistentSet.endRead(PersistentSet.java:273)
   at org.hibernate.engine.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.java:183)
   at org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:268)
   at org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:249)
   at org.hibernate.loader.Loader.endCollectionLoad(Loader.java:866)
   at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:853)
   at org.hibernate.loader.Loader.doQuery(Loader.java:717)
   at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
   at org.hibernate.loader.Loader.loadCollection(Loader.java:1919)
   at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:36)
   at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:520)
   at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:60)
   at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1676)
   at org.hibernate.collection.AbstractPersistentCollection.forceInitialization(AbstractPersistentCollection.java:454)
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   at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:229)
   at org.hibernate.loader.Loader.loadEntity(Loader.java:1785)
   at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:47)
   at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:41)
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<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
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        <property name="arrivalStatus" type="java.lang.String">
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        <property name="repatDate" type="java.util.Date">
            <column name="RepatDate" length="19" />
        </property>
        <property name="repatStatus" type="java.lang.String">
            <column name="RepatStatus" length="18" />
        </property>
        <property name="transferStatus" type="java.lang.String">
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        </property>
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It seems that the exception throwed on the hashcode() for NULL value field include in the association.... The many-2-one assciation is bidirectional, by the way.
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<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
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Fail to bind Java Short/Byte type in Oracle Driver in WLS6.1

Hi,
In Oracle, the field is defined as Number(5), but we failed to bind
the Java Short/Byte object to the PreparedStatement in WLS.
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Any hint here? Or other people can succeed with Oracle's own driver.
I have noticed a post about WLS's Oracle Driver support will be ceded
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Thanks,
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We get this exception thrown from WLS:
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The method is like
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Thanks
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On Thu, 24 Jan 2002 21:11:47 -0800, "Slava Imeshev"
<[email protected]> wrote:
Hi Simon,
Could you show us your code?
Do you get any exceptions?
Regards,
Slava Imeshev
"Simon Song" <[email protected]> wrote in message
news:[email protected]..
Hi,
In Oracle, the field is defined as Number(5), but we failed to bind
the Java Short/Byte object to the PreparedStatement in WLS.
WLS 6.1 with SP2.
Any hint here? Or other people can succeed with Oracle's own driver.
I have noticed a post about WLS's Oracle Driver support will be ceded
in the future. Can we still get support on the Oracle Driver from WLS?
Thanks,
Sheng Song

Does the Number type in Oracle always map to the Java BigDecimal object

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Thanks,
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[email protected]

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Keith Nielsen:
We have noticed that whenever we create a column in a table of type smallint, integer, real, etc. that the type in sqlplus always shows up as number(x). Our problem is that this type always seems to map to java.math.BigDecimal through JDBC. Is this a bug in the JDBC drivers???
Put another way when I create a column of type smallint I expect that after performing a query I should be able to call the getShort method on the result set in order to get the value from the afore mentioned column. But instead I get a ClassCastException because the Java type for the column is actually a java.math.BigDecimal.
Thanks,
Keith
[email protected]<HR></BLOCKQUOTE>
~~~
The possible Java types to which SQL NUMBER type can be materialized to include
oracle.sql.NUMBER
java.lang.Byte
java.lang.Short
java.lang.Integer
java.lang.Long
java.lang.Float
java.lang.Double
java.math.BigDecimal
byte,short, int, long, float, double
For a complete listing for all datatypes mappings refer the Oracle8i JDBC Developer's guide and reference.

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Victor,
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Connecting java file to jsp

Hi i'm working on a jsp file and i want my jsp file to access the methods in a java file of mine.I have an idea its got something to do with beans. But i have no knowledge about beans. does anyone know how i can acheive it.

The following ( from the java tutorial with samples is downloadable) gave me the clarity in understanding how .jsp interact with classes (modified beans)
This tutorial is available at
http://java.sun.com
and follow thelinks for the tutorial.
Here Goes.....
Home | Download | PDF | API | FAQ | Search | Feedback | History
JavaBeans Components
JavaBeans components are Java classes that can be easily reused and composed together into applications. Any Java class that follows certain design conventions is a JavaBeans component.
JavaServer Pages technology directly supports using JavaBeans components with standard JSP language elements. You can easily create and initialize beans and get and set the values of their properties.
JavaBeans Component Design Conventions
JavaBeans component design conventions govern the properties of the class and govern the public methods that give access to the properties.
A JavaBeans component property can be
Read/write, read-only, or write-only
Simple, which means it contains a single value, or indexed, which means it represents an array of values
A property does not have to be implemented by an instance variable. It must simply be accessible using public methods that conform to the following conventions:
For each readable property, the bean must have a method of the form
PropertyClass getProperty() { ... }
For each writable property, the bean must have a method of the form
setProperty(PropertyClass pc) { ... }
In addition to the property methods, a JavaBeans component must define a constructor that takes no parameters.
The Duke's Bookstore application JSP pages bookstore.jsp, bookdetails.jsp, catalog.jsp, and showcart.jsp use the database.BookDB and database.BookDetails JavaBeans components. BookDB provides a JavaBeans component front end to the access object database.BookDBAO. The JSP pages showcart.jsp and cashier.jsp access the bean cart.ShoppingCart, which represents a user's shopping cart.
The BookDB bean has two writable properties, bookId and database, and three readable properties: bookDetails, numberOfBooks, and books. These latter properties do not correspond to any instance variables but rather are a function of the bookId and database properties.
package database;
public class BookDB {
private String bookId = "0";
private BookDBAO database = null;
public BookDB () {
public void setBookId(String bookId) {
this.bookId = bookId;
public void setDatabase(BookDBAO database) {
this.database = database;
public BookDetails getBookDetails() throws
BookNotFoundException {
return (BookDetails)database.getBookDetails(bookId);
public List getBooks() throws BooksNotFoundException {
return database.getBooks();
public void buyBooks(ShoppingCart cart)
throws OrderException {
database.buyBooks(cart);
public int getNumberOfBooks() throws BooksNotFoundException {
return database.getNumberOfBooks();
Creating and Using a JavaBeans Component
To declare that your JSP page will use a JavaBeans component, you use a jsp:useBean element. There are two forms:
<jsp:useBean id="beanName"
class="fully_qualified_classname" scope="scope"/>
and
<jsp:useBean id="beanName"
class="fully_qualified_classname" scope="scope">
<jsp:setProperty .../>
</jsp:useBean>
The second form is used when you want to include jsp:setProperty statements, described in the next section, for initializing bean properties.
The jsp:useBean element declares that the page will use a bean that is stored within and is accessible from the specified scope, which can be application, session, request, or page. If no such bean exists, the statement creates the bean and stores it as an attribute of the scope object (see Using Scope Objects). The value of the id attribute determines the name of the bean in the scope and the identifier used to reference the bean in EL expressions, other JSP elements, and scripting expressions (see Chapter 16). The value supplied for the class attribute must be a fully qualified class name. Note that beans cannot be in the unnamed package. Thus the format of the value must be package_name.class_name.
The following element creates an instance of mypkg.myLocales if none exists, stores it as an attribute of the application scope, and makes the bean available throughout the application by the identifier locales:
<jsp:useBean id="locales" scope="application"
class="mypkg.MyLocales"/>
Setting JavaBeans Component Properties
The standard way to set JavaBeans component properties in a JSP page is by using the jsp:setProperty element. The syntax of the jsp:setProperty element depends on the source of the property value. Table 12-3 summarizes the various ways to set a property of a JavaBeans component using the jsp:setProperty element.
Table 12-3 Valid Bean Property Assignments from String Values Value Source Element Syntax
String constant <jsp:setProperty name="beanName"
property="propName" value="string constant"/>
Request parameter <jsp:setProperty name="beanName"
property="propName" param="paramName"/>
Request parameter name that matches bean property <jsp:setProperty name="beanName"
property="propName"/>
<jsp:setProperty name="beanName"
property="*"/>
Expression <jsp:setProperty name="beanName"
property="propName" value="expression"/>
<jsp:setProperty name="beanName"
property="propName" >
<jsp:attribute name="value">
expression
</jsp:attribute>
</jsp:setProperty>
1. beanName must be the same as that specified for the id attribute in a useBean element.
2. There must be a setPropName method in the JavaBeans component.
3. paramName must be a request parameter name.
A property set from a constant string or request parameter must have one of the types listed in Table 12-4. Because constants and request parameters are strings, the web container automatically converts the value to the property's type; the conversion applied is shown in the table.
String values can be used to assign values to a property that has a PropertyEditor class. When that is the case, the setAsText(String) method is used. A conversion failure arises if the method throws an IllegalArgumentException.
The value assigned to an indexed property must be an array, and the rules just described apply to the elements.
Table 12-4 Valid Property Value Assignments from String Values Property Type Conversion on String Value
Bean Property Uses setAsText(string-literal)
boolean or Boolean As indicated in java.lang.Boolean.valueOf(String)
byte or Byte As indicated in java.lang.Byte.valueOf(String)
char or Character As indicated in java.lang.String.charAt(0)
double or Double As indicated in java.lang.Double.valueOf(String)
int or Integer As indicated in java.lang.Integer.valueOf(String)
float or Float As indicated in java.lang.Float.valueOf(String)
long or Long As indicated in java.lang.Long.valueOf(String)
short or Short As indicated in java.lang.Short.valueOf(String)
Object new String(string-literal)
You use an expression to set the value of a property whose type is a compound Java programming language type. The type returned from an expression must match or be castable to the type of the property.
The Duke's Bookstore application demonstrates how to use the setProperty element to set the current book from a request parameter in the database bean in bookstore2/web/bookdetails.jsp:
<c:set var="bid" value="${param.bookId}"/>
<jsp:setProperty name="bookDB" property="bookId"
value="${bid}" />
The following fragment from the page bookstore2/web/bookshowcart.jsp illustrates how to initialize a BookDB bean with a database object. Because the initialization is nested in a useBean element, it is executed only when the bean is created.
<jsp:useBean id="bookDB" class="database.BookDB" scope="page">
<jsp:setProperty name="bookDB" property="database"
value="${bookDBAO}" />
</jsp:useBean>
Retrieving JavaBeans Component Properties
The main way to retrieve JavaBeans component properties is by using the JSP EL expressions. Thus, to retrieve a book title, the Duke's Bookstore application uses the following expression:
${bookDB.bookDetails.title}
Another way to retrieve component properties is to use the jsp:getProperty element. This element converts the value of the property into a String and inserts the value into the response stream:
<jsp:getProperty name="beanName" property="propName"/>
Note that beanName must be the same as that specified for the id attribute in a useBean element, and there must be a getPropName method in the JavaBeans component. Although the preferred approach to getting properties is to use an EL expression, the getProperty element is available if you need to disable expression evaluation.
All of the material in The J2EE(TM) 1.4 Tutorial is copyright-protected and may not be published in other works without express written permission from Sun Microsystems.
hope this helps
regards,

WEB-AS JAVA type TS not removable from SLD

Hi Experts,
I have a peculiar issue where In I have a ECC 6.0 ( SID :- RD1) added in my SLD of PI 7.0 as WEB-AS ABAP Type Technical System.
I was able to work with the corresponding Business System in my ID( configuration). But two days back when I logged in to view my SLD , I could see that in my Technical System category there are two instances of RD1 one WEB-AS ABAP and other WEB-AS JAVA . Now I suppose WEB-AS JAVA type TS for RD1 was created by mistake. But now when I am removing it from the TS category and also removing the instances created under BCSystem and SAP JAVA cluster in content maintainence. I see the WEB-AS JAVA type TS appearing again in the TS after some time. I repeated the same several times and also start/stop the SLD server but then after sometime again the WEB-AS JAVA type TS for RD1( ECC 6.0 - not required) appearing in the list of TS.
I am unable to understand this absurd behaviour. I have carefully removed all the instances from the content maintainence but still it appears after sometime.
Are there any other possible places where there can be instance created for the WEB-AS JAVA type TS in SLD server where from I am supposed to remove it ???
Regards
Nishant

Hi Nishant,
You question is little confusing
Case1. Are you saying : You made TS (Say XYZ) for ABAP part of an SAPECC system and next day you found a TS with the same name (XYZ) for the same SAPECC system, but the component was JAVA In short you have two TS one for each ABAP & Java Part of the same systems.
Case2 :1. Are you saying : You made TS (Say XYZ) for ABAP part of an SAPECC system and next day you found a TS with the some other name (ABC) for the same SAPECC system, but the component was JAVA In short you have a TS for each ABAP & Java Part of the same system. If this is the case then, how is this possible both cannot have same name
Regards
Suraj

Modularize the java code

Hello All,
I am working on a Java project in eclipse which has the following structure:
package
    |---Trie.java
    |---TrieImpl.java
    |---TrieNode.javaThe main class and the operations on the Trie are methods in 'TrieImpl.java'
In short, the TrieImpl.java file is as:
import.....
public class TrieImpl<T> implements Trie<T>
    public boolean delete(String key) {
    public void insert(String key, T value) {
   public void search(String query, int distance) {
   search(root,query,distance,qPos,weight,result,found);
   private void search(TrieNode<T> node, String Q, int D, int qIndex, int W, StringBuilder result, boolean found) {
   while (found == false && qIndex < Q.length() && W <= D ) {
   do something
   search(n, Q, D, qIndex, W, result, found); // recursive search
   public void static main {
       TrieImpl<String> tree = new TrieImpl<String>();
       ......get the query and distance from the user......
       tree.search(query,distance);
}I would like to use Global variables like the boolean variable found in the search function.
for e.g. here are some variables I would like to be global
boolean found
int distance
int qIndex
String Q (the original query string)
StringBuilder result
So that when I set the found to true in any on the search recursions, I can exit the search stack.
The problem right now is that since I am passing the 'found' value at every recursion, each stack has a different boolean value for found.
Some suggestions I googled instructed to create a global class and access the variables with the class identifier.
How can I do that here?
Thanks in advance.

The problem right now is that since I am passing the 'found' value at every recursion, each stack has a different boolean value for found.Why doesn't your method just return a bool to indicate the result?

How fast is Java?

I am current having a linkedlist of objects(I have to use linkedlist), I populated with 51000 objects inside. These objects have one string in each and each string is small in size and there is no duplicates.
Now I run through this list to search for one string, let's say "XXXxxxXXX". This string, in worst case, is now being placed at the bottom of the list. Now, I run through 51000 objects to do a string compare and this little program doesn't even have GUI. It runs in 7 seconds.
I just wonder why it takes so long? my coworker told me that it takes < 7ms to finish this in a PLC. Any idea that I can make this Java program shorter in second? Here is my code:
public boolean findMessage(Message message){
          int size = messageQueue.size();
          boolean found = false;
          for(int i=size-1;i>=0;i--){
               Message candidate = messageQueue.get(i);
               if(message.getMessage().equalsIgnoreCase(candidate.getMessage())){
                    i = -1;
                    found = true;
          return found;
MessageQueue queue = MessageQueue.getInstance();
               queue.setMaxSize(51000);
               for(int i=0;i<51000;i++){
                    queue.addMessage(new Message(Integer.toString(i)));
               // Find the last one and print
               long start = System.currentTimeMillis();
               long queueSize = queue.getMaxSize();
               boolean found = false;
               Message search = new Message(Integer.toString(0));
               if(queue.findMessage(search) == true){
                    found = true;
               long end = System.currentTimeMillis();
               long total = end - start;
               System.out.println("Time used to search("+found+"):" + ((double)total)/((double)1000));

The hardware is:
P-D 1.8GHz
2GB Ram
WinXP SP2
Compiler: jdk1.5.0_09
I am actually writing a program that my coworker's 20 PLCs send signals to my program and my program spawns threads to take care of all requests. Requests are as simple as a string that is asking if the previous PLC has done its job. We are going to use DB to search for the record, as long as the record is inserted there, that PLC knows its previous PLC has done its job so the second one can start its job.
However, DB takes too long to search especially when you need to re-index it all the time and PLC needs response in 50ms. So I wonder at least if I could take it down to 0.5 second, that should be still possible to take it down more or possibly using jni. Why I don't go for C then? because Java's built-in threading capability is a wonderful product that I should make sure of. Of course if I could make it in pure Java, it would be great because we won't know what platform we will deploy this Java program on.
So any idea? even if you say assembly language would be fine for me, but please provide me details on it because I am just a beginner. Thanks.

How is literal short works...?

Hi frnds i am new to this forum i have some basic doubt on literals.
public class example{
public static void go(Long n){System.out.println("Its Long");};
     public static void go(Short n){System.out.println("Its Short");};
     public static void go(int n){System.out.println("Its Int");};
public static void main(String[] args) {
short x=6;
          long y=7;
          go(x);
          go(y);
The out put of this is:
Its Int
Its Long
why its Int is printed instead its short? I have doubt here how exactly this literals works in case of in and short datatypes?
any suggestion and explanations ... thanks in advance.

hi ejp.... thanks for the reply...
basically i dont have any purpose to work this code to print as its short.
i just wanna know what exactly making this go(x); to execute go(int n).... even though ther is go(Short n).. method ..?
x is declared as short.
when i replace literal to its wrapper class Short (java.lang,Short) out put will be Its short.
why this not apply for Long..???
Any explanation..

BC4J/Struts java.lang.ClassCastException in UpdateAction

Dear reader,
I am facing a problem that I can't address. I have an entity object named 'Employee' and on the password field, there is one validation rule (a method, which checks if the passwords length is between 6 and 12 characters). I have a view called 'EmployeeView' for this entity.
I have a jsp page, where a form can be used to update an Employee's data (using an update-action servlet). This all works fine if there is no validation rule on one of the fields (as is on password), as soon as the user fills in let's say a too short password, in UpdateAction this line causes an ClassCastException.
oracle.jbo.html.struts11.actions.UpdateAction.execute(UpdateAction.java:85)
The source-line it goes wrong:
ApplicationConfig appConfig = (ApplicationConfig) request.getAttribute(Action.APPLICATION_KEY);
Apparently it is not set then... But it works fine if the password is filled in within the range of the rule.
Does anyone have any idea why this is caused? Am I missing something vital? Or am I doing something wrong? Thanx a lot for your time.
Regards,
Martijn

Take a look at the stack trace, it shows you exactly where the error is coming from:
java.lang.ClassCastException: org.theclass.candidate.view.SearchForm
org.theclass.candidate.view.CandidateListAction.execute(CandidateListAction.java:41)Line 41 in your CandidateListAction.
Probably it is failing on a cast of your action form.
Taking a closer look at your struts-config, you are "chaining" actions.
Your AddCandidateAction uses the candidateForm, and forwards to CandidateListAction.do
Your CandidateListAction uses the searchForm.
That will be the cause of your class cast exception.
<action path="/Add"
name="candidateForm"
type="org.theclass.candidate.view.AddCandidateAction"
validate ="true"
input="/jsp/addcandidate.jsp">
<forward name="success" path="/CandidateList.do"/>
</action>
<action path="/CandidateList"
type="org.theclass.candidate.view.CandidateListAction"
name="searchForm"
scope="request" >
<forward name="failure" path="/jsp/list.jsp"/>
<forward name="success" path="/jsp/candidatelist.jsp"/>
</action>Check out: http://struts.apache.org/1.x/faqs/newbie.html#chaining
Solutions?
- don't chain actions ;-)
- use the same action form for both actions (possible?)
- make the actionForward a "redirect" one. That means a new request, and losing any request parameters/attributes but should prevent this class cast exception.
Hope this helps,
evnafets

Java.lang.ClassCastException: com.businessobjects.dsws.session.impl.Credent

Hi All,
I am trying to create a web session with Java SDK using Eclipse. I am use Business Objects XI R3.1. While creating web session it gives me exception on line SessionInfo boSI = boSession.login(boCredential);
I have ensured user name password and cms url.
java.lang.ClassCastException: com.businessobjects.dsws.session.impl.CredentialIm
pl
        at com.businessobjects.dsws.session.SessionSkeleton.login(Unknown Source
        at com.businessobjects.dsws.session.SessionMessageReceiverInOut.invokeBu
sinessLogic(Unknown Source)
        at org.apache.axis2.receivers.AbstractInOutSyncMessageReceiver.invokeBus
inessLogic(AbstractInOutSyncMessageReceiver.java:42)
        at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMe
ssageReceiver.java:96)
        at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:145)
        at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostReq
uest(HTTPTransportUtils.java:275)
        at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:1
20)
        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(Appl
icationFilterChain.java:252)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
        at com.businessobjects.dsws.wsc.common.axis.FlashFilter.doFilter(Unknown
Source)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:202)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:173)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:178)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:126)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:105)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:107)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:148)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:869)
        at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.p
rocessConnection(Http11BaseProtocol.java:664)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpo
int.java:527)
        at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFol
lowerWorkerThread.java:80)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP
ool.java:684)
        at java.lang.Thread.run(Thread.java:595)
Thanks in advance,
Rajendra

I have experienced exactly the same problem with saaj from jwsdp 2.0
If you found a solution, please give us a short feedback ?
I juste noticed that the same code works great with axis 1.4 saaj api.

Jpql - multi expressions in select query, java.lang.ClassCastException:

Hello, i'm trying to get a Unit object from the query below.
i am getting javax.ejb.EJBException in this method
@NamedQuery(name = "getUnitIdUnitName", query = "SELECT u.unitId,u.unitName FROM Unit u "+ "ORDER BY u.unitName")
public Unit getUnitsComboBox() {
//get UnitId, UnitName from Units.
Unit unitIDUnitName =(Unit) ((List<Object[]>)em.createNamedQuery("getUnitIdUnitName").getResultList()).get(0)[0];
return unitIDUnitName;
Caused by: java.lang.ClassCastException: java.lang.Long cannot be cast to mmis.entity.Unit
Must i use an iterator ?
Thanx

Amasoni wrote:
Hello, i'm trying to get a Unit object from the query below.
i am getting javax.ejb.EJBException in this method
@NamedQuery(name = "getUnitIdUnitName", query = "SELECT u.unitId,u.unitName FROM Unit u "+ "ORDER BY u.unitName")
public Unit getUnitsComboBox() {
//get UnitId, UnitName from Units.
Unit unitIDUnitName =(Unit) ((List<Object[]>)em.createNamedQuery("getUnitIdUnitName").getResultList()).get(0)[0];
return unitIDUnitName;
Caused by: java.lang.ClassCastException: java.lang.Long cannot be cast to mmis.entity.Unit
ThanxYou don't want to select the columns, you want to select the object itself.
SELECT u FROM Unit u ORDER BY u.unitName
or even shorter:
FROM Unit u ORDER BY u.unitName
Try to reason where to put your question by the way, it is not about Javaserver Faces. If you can't find a forum that clearly matches consider putting it in Java Programming. In this case it was entirely unnecessary since you already posted JPA questions in the EJB forum, which is a decent match.

Java.lang.ClassCastException

My class CDRack is almost ready, but in the last method
sortAlphabetically() there
comes java.lang.ClassCastException. I found in the net
http://java.sun.com/docs/books/tutorial/collections/algorithms/
that with method Collections.sort(l) I can sort alphabetically.
The code compiles, but when I run it with a tester program, it stops
to ClassCastException in the almost last row.
Something is wrong with Collections.sort(l) ?
/** Class CDRack represents collections of compact discs. Discs are
located in the rack in slots numbered from zero upwards. The discs are
represented by Record objects and empty slots by null values. */
public class CDRack extends Object {
private Record[] mRecords;
private int size;
/**Creates a new, empty CD rack.
Parameters:
size - the size of the new rack, i.e. the number of slots it has */
      public CDRack(int size) {
          mRecords = new Record[size];
          this.size = size;
/** "Organizes" the discs in the rack so that they will be located in
consecutive slots starting at slot number zero, and any and all empty
slots will be at the "end of the rack". After calling this method, the
discs are in an undefined (i.e. arbitrary) order - the only thing this
method guarantees is that there aren't any empty slots in between full
ones.
      public void organize() {
          // Turn array into a list - more flexible
          List l = Arrays.asList(aanilevyt);
          // Remove all nulls from a copy of the list which supports removal.
          l = new ArrayList(l);
          while (l.remove(null)) /*do nothing*/;
          // Clear the original array.
          for (int i = 0; i < mRecords.length; i++){
               mRecords[i] = null;
          } // Put the non-nulls back.
          l.toArray(mRecords);
/**"Organizes" the discs in the rack to the beginning of the rack (see
the method organize) and sorts them in alphabetical order. Recordings
by the same artist are placed in alphabetical order by disc name. */
    public void sortAlphabetically() {
          // Turn array into a list - more flexible
          List l = Arrays.asList(aanilevyt);
          // Remove all nulls from a copy of the list which supports removal.
          l = new ArrayList(l);
          while (l.remove(null)) /*do nothing*/;
          // Clear the original array.
          for (int i = 0; i < mRecords.length; i++){
               mRecords[i] = null;
          } // Put the non-nulls back.
          l.toArray(mRecords);
          Collections.sort(l);   // alphabetical order. THERE IS CLASSCASTEXCEPTION
}

I have thought and thought but the sorting alphabetically doesnt work.
I can't use Collections.sort and class Record doesnt implement Comparable(and I can't change it).
One suggestion was that I could make my own class which implements Comparator. Could it be like this
import java.util.*;
public class AlphabeticComparator
implements Comparator{
public int compare(Object o1, Object o2) {
    String s1 = (String)o1;
    String s2 = (String)o2;
    return s1.toLowerCase().compareTo(
      s2.toLowerCase());
}      But how an earth can I tell to CDRack class that it would
use the class AlphabeticComparator?
Somebody please save my Christmas!
/** Class CDRack represents collections of compact discs. Discs are
located in the rack in slots numbered from zero upwards. The discs are
represented by Record objects and empty slots by null values. */
public class CDRack extends Object {
private Record[] mRecords;
private int size;
/**Creates a new, empty CD rack.
Parameters:
size - the size of the new rack, i.e. the number of slots it has */
      public CDRack(int size) {
          mRecords = new Record[size];
          this.size = size;
/** "Organizes" the discs in the rack so that they will be located in
consecutive slots starting at slot number zero, and any and all empty
slots will be at the "end of the rack". After calling this method, the
discs are in an undefined (i.e. arbitrary) order - the only thing this
method guarantees is that there aren't any empty slots in between full
ones.
      public void organize() {
          // Turn array into a list - more flexible
          List l = Arrays.asList(aanilevyt);
          // Remove all nulls from a copy of the list which supports removal.
          l = new ArrayList(l);
          while (l.remove(null)) /*do nothing*/;
          // Clear the original array.
          for (int i = 0; i < mRecords.length; i++){
               mRecords<i> = null;
          } // Put the non-nulls back.
          l.toArray(mRecords);
/**"Organizes" the discs in the rack to the beginning of the rack (see
the method organize) and sorts them in alphabetical order. Recordings
by the same artist are placed in alphabetical order by disc name. */
    public void sortAlphabetically() {

Java.lang.ClassCastException: java.lang.Short

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