To create an instance class Bean

Interested in knowing to create an
instance of class which extends TieDocument.
The required values to be given to the
constructur arguments.
public Myclass extends Tiedocument
public MyClass(LibrarySession ifs, java.lang.Long id,
java.lang.Long classId, S_LibraryObjectData data)
throws IfsException {
super(ifs,id,classId,data);}
What should be the values to be given to the
classId,Id,S_LibraryObjectData.
Looking forward for your reponses.

Here is an example
package ifs.demo.typeDefinition;
import oracle.ifs.beans.TieDocument;
import oracle.ifs.beans.LibrarySession;
import oracle.ifs.server.S_LibraryObjectData;
import oracle.ifs.common.IfsException;
public class SimpleImage extends TieDocument
public SimpleImage(LibrarySession ifs,
java.lang.Long id,
java.lang.Long classId,
S_LibraryObjectData data)
throws IfsException
// Construct a Document object - standard variant.
super(ifs,id,classId,data);
null

Similar Messages

Is this right: How to create an instance of a managed bean?

public static void setManagedBean(String name, Object obj) {
FacesContext.getCurrentInstance().getApplication().createValueBinding("#{" + name + "}").setValue(FacesContext.getCurrentInstance(), obj);
And how do I delete a managed bean attached to the session? (I don't
need to do that but for the sake of completeness, I figure better to ask
now.)
Thanks - dave

This is very dangerous ground because you give up compile-time safety, but you can get a Class object using Class.forName(String). Then you can use methods of the class Class to operate on it (including creating an instance).

Creating an instance of a class from within another class

I am trying to create an instance of MCQ in the T class but I am getting this error:
File: E:\JAVA PROGRAMS\assignment 1\T.java [line: 15]
Error: cannot find symbol
symbol : class MCQ
location: class T
here are the two classes:
// class T
import java.awt.*;
import java.util.*;
import java.lang.*;
public class T{
public T(String aT)
pest = aT;
public static T t_one()
T aT = new T("Calculator");
aT.addQ(new MCQ( " 2 + 2", "equals 4", "equals 5", "equals 0", " equals -2",
"is a prime number", 1));
return aT;
private String pest;
//class Q
import java.awt.*;
import java.util.*;
import java.lang.*;
public abstract class Q{
Vector q = new Vector();
public String aT;
abstract void addQ(Q aQ);
public class MCQ extends Q{
String a,b,c,d,e,f,g;
int answer;
public MCQ (String a, String b, String c, String d, String e, int answer)
this.a = a;
this.b = b;
this.c = c;
this.d = d;
this.e = e;
this.answer = answer;
void addQ(Q aQ)
q.addElement(new T(aT));
I tried to make reference to MCQ by doing this in class T:
MCC qT = new MCQ() ;
but that presents a whole other set of problems.
please help I think I have tried everything!

Use code tags (http://forum.java.sun.com/help.jspa?sec=formatting)
Don't import java.lang.* . You get those automatically.
Your MCQ class is really Q.MCQ (the way you posted, anyway).
If Q weren't abstract, you could do:
new Q().new MCQ(...)But, you can't create a Q without defining 'add'. You could do it anonymously, but that makes no sense. Put Q and MCQ in separate files and try again.

Create multiple instances of same class but with unique names

Hi,
I'm creating an IM application in Java.
So far I can click on a user and create a chat session, using my chatWindow class. But this means I can only create one chatWindow class, called 'chat'. How can I get the application to dynamically make new instances of this class with unique names, for examples chatWindowUser1, chatWindowUser2.
Below is some code utlising the Openfire Smack API but hopefully the principle is the clear.
    private void chatButtonActionPerformed(java.awt.event.ActionEvent evt) {
        int selectedUserIndex = rosterList.getSelectedIndex();
        String selectedUser = rostAry[selectedUserIndex].getUser();
        System.out.println("Chat with: " + selectedUser);
        if (chatBox == null) {
            JFrame mainFrame = CommsTestApp.getApplication().getMainFrame();
            chatBox = new CommsTestChatBox(mainFrame,conn,selectedUser);
            chatBox.setLocationRelativeTo(mainFrame);
        CommsTestApp.getApplication().show(chatBox);
}

yes, an array would work fine, just realize that by using an array, you're setting an upper bound on the number of windows you can have open.
As for unique names, if you mean unique variable name, you don't need one. The array index serves to uniquely identify each instance. If you mean unique title for the window, set that however you want (username, index in array, randomly generated string, etc.). It's just a property of the window object.

Can we create multiple instances of a Bean in a JSP file?

Hi,
I am new to JSP & Servlets programming.
I need to write a servlet that connects to a database via JDBC ( using IBM DB2 dbms) , sets some Beans with the tuples in the relevant table.
Then, I need to have a JSP "read" ( or "get") info from the Beans & display the contents to the client.
( At a time only 5 tuples must be visible in the UI , with Next & Prev links ...)
I am using Tomcat 4.0 for this...
Can any one please help me regarding HOW to go abt it ?
Esp., should we create 1 instance of a Bean , ( say "DataBean") for EACH tuple , or is there a way to do it with only 1 instance...
Please, guide me... ( if not possible, at least give me some hints to some GOOD resources ( books, sites,etc.), that deal with this kind of applications)
Thanks,
Raghu.

Once again, thanx a lot for your detailed help -- evnafets !!
I think I am gaining in my knowledge of JSP & Servlets thanks to your help...
Now, I am tackling the issue of selecting the BEST way of "STORING" which "PAGE" no. I am displaying.
Say, I have only 15 tuples(ROWS), & with 5 tuples displayed per page, I have to have 3 "pages", & I need to accomplish the handling of "Prev" & "Next" links using only 1 Servlet & 1 JSP ( apart from the Authorization servlet ).
I am thinking of storing a "session-scoped" variable called "page-num". Do you think it's the best way?
Or should I score it as an "application-scoped variable" ( i.e., in the ServletContext ...) ??
Also, I have got no clues as to which of the following would be a better idea :
(a) Fetch ALL the tuples in the table & set as many beans. And then display the corresponding 5 tuples in each page.
Here, more bean instances are needed to hold the data which gets repeatedly passed around ( when Prev & Next links are clicked ).
OR ..
(b)Fetch only 5 tuples at a time . I think this may be done by creating a scrollable Resultset & then moving around to the appropriate ROW by saying
resultSet.absolute( (page_num - 1)*5 + 1 ); & then fetching 5 tuples relative to this row.
In this case I will need atmost 5 Bean objects per request.
And YES, one more thing , WOULD you PLEASE try & give me some guidance towards some good references to JSP, Servlets & J2EE ? ( Links, Books, anything ! )
Sorry for the TROUBLE I gave, but THANKS a lot for the TROUBLE u took ! ;-)
Thanks & Regards,
Raghu

Create an instance of my class variable

Hello all,
I'm a newbie to iPhone/iPad programming and am having some trouble, I believe the issue is that I'm not creating an instance of my class variable. I've got a class that has a setter and a getter, I know about properties but am using setters and getters for the time being. I've created this class in a View-based application, when I build the program in XCode 3.2.6 everything builds fine. When I step through the code with the debugger there are no errors but the setters are not storing any values and thus the getters are always returning 0 (it's returning an int value). I've produced some of the code involved and I was hoping someone could point out to me where my issue is, and if I'm correct about not instantiating my variable, where I should do that. Thanks so much in advance.
<p>
Selection.h
@interface Selection : NSObject {
int _choice;
//Getters
-(int) Choice;
//Setters
-(void) setChoice:(int) input;
Selection.m
#import "Selection.h"
@implementation Selection
//Getters
-(int)Choice {
return _choice;
//Setter
-(void)setChoice:(int)input{
          _choice = input;
RockPaperScissorsViewController.m
#import "RockPaperScissorsViewController.h"
@implementation RockPaperScissorsViewController
@synthesize rockButton, paperButton, scissorsButton, label;
//@synthesize humanChoice, computerChoice;
-(void)SetLabel:(NSString *)selection{
          label.text = selection;
-(IBAction)rockButtonSelected {
//          [self SetLabel:@"Rock"];
          [humanChoice setChoice:1];
</p>
So in the above code it's the [humanChoice setChoice:1] that is not working. When I step through that portion with the debugger I get no errors but when I call humanChoice.Choice later on in the code I get a zero.
-NifflerX

It worked, thank you so much. I put
humanChoice = [[Selection alloc]init];
In viewDidLoad and it worked like a charm. Thank you again.
-NifflerX

Why portal server can't create an instance of axis.Service class?

Hi,gurus,
We developed a uwl custom connector,The time out occured in that custom connector.After adding the time out value from 30s to 300s,the problem still existed.
The code is like below:
String endpoint = "http://172.16.127.4:8080/appframe-web/services/WorkItemService";
Service service = new Service(); // time out code
Call call = (Call) service.createCall();
call.setTargetEndpointAddress(endpoint);
call.setOperationName("wisForPortal");
call.addParameter("userCode", org.apache.axis.encoding.XMLType.XSD_STRING, javax.xml.rpc.ParameterMode.IN);/
call.setReturnType(org.apache.axis.encoding.XMLType.XSD_STRING);
String temp = "36";
Object result = call.invoke(new Object[]{temp});
The time out occured when the portal server create an instance of Service class.Does that mean the server can't find the jars?
But the object declaration like "Service service=null;" is all right.
Any ideas?Thanks in advance.

I have a project called 'Default EAR' in my workspace.
But I can't add the JAR to the that project. These instructions are for WSAD 4, but I assume WSAD 5 is similar:
Go to menu File and select Import. Choose "File System" to import from. Specify "Default EAR" as your folder and select the jar file from the directory/browse prompt.
This is assuming your web app is connected to Default EAR and not some other EAR file. Also once you've done this, you will find that the jar file automatically becomes part of your build path. You didn't have to do anything extra to make that happen.

Creating multiple instances of a class in LabVIEW object-oriented programming

How do you create multiple instances of a class in a loop? Or am I thinking about this all wrong?
For instance, I read in a file containing this information:
Person Name #1
Person Age #1
Hobby #1
Hobby #2
Hobby #3
Person Name #2
Person Age #2
Hobby #1
Hobby #2
Hobby #3
Person Name #3
Person Age #3
Hobby #1
Hobby #2
Hobby #3
If I define a Person class with name, age, and an array of strings (for the hobbies), how can I create several new Person instances in a loop while reading through the text file?
FYI, new to LabVIEW OOP but familiar with Java OOP. Thank you!

First of all, let's get your terminology correct. You are not creating multiple instances of a class. You are creating Objects of the class.
Use autoindexing to create an array of your class type.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
Unofficial Forum Rules and Guidelines

How to create an instance of a class which is stored in a String?

I've class name stored in a String Object.
now i've to create an instance of that class name.
How?

This is very dangerous ground because you give up compile-time safety, but you can get a Class object using Class.forName(String). Then you can use methods of the class Class to operate on it (including creating an instance).

How to create an instance of a protected class outside the enclosing packag

Hi all,
I have a piece of code like this:
package test;
public class A {
protected class B { }
How to create an instance of B outside the package test ? Could you please give me an example ?
Thanks
Ha Chau

Thank WirajR for your reply, but in your solution,
you have to create an instance of B inside class A
and pass it outside. I would like to know whetherwe
can create an instance of class B outside thepackage
test. That means I want the instance creation
expression of B appears outside the package test.Can
we do that?
If you want to use a class this way then it shouldn't
be marked protected. I can't see why you don't
just declare it public if that's what it is.
Wouldn't be much point to haveing a protected
modifier if it had no effect, would there?I think there is use for it if you use an interface to filter out the parts you want to give public access to, and keep the part you want to keep protected, protected

How to create an instance of a class?

how do you create sn instance of a class, and how do you call a method from another class?

You may need to read thru the information provided on this page to understand how to create objects: http://java.sun.com/docs/books/tutorial/java/data/objectcreation.html
I'd also suggest you read the tutorial available at: http://java.sun.com/docs/books/tutorial/java/index.html
Regarding how you call a method belonging to another class you could do it in the foll. ways depending on whether the method is static or not - a static method may be called using the class name followed by a dot and the static method name while a non-static method would require you to create an instance of the class and then use that instance name followed by a dot and the method name. All said and done i'd still suggest you read thru the complete Java programming tutorial to get a good grounding on all these concepts and fundamentals of the language if you are looking to master the technology.
Thanks
John Morrison

Creating different instances of one class

Hi everyone thanks so much for all the help so far! I want to create a new instance of class coauthorship everytime the loop goes around to a new record! However thats not whats happening it only creates 1 instance of coauthorship and it is overwritten with every loop here is Class Coauthorship
public class Coauthorship {
    private String name, coauthor, title;
    private List titles;
    /** Creates a new instance of Coauthorship */
    public Coauthorship(String name1, String name2, String TITLE){
        name = name1;
        coauthor = name2;
        title = TITLE;
        //List titles = Collections.synchronizedList(new ArrayList(alltitles));
    public String getauthor(){
        return name;
    public void settitle(String TITLE){
        title = TITLE;
    public void setname(String name1){
        name = name1;
   public void setcoauthor( String name2){
        coauthor = name2;
// public void addTitle(String TITLE){
    //    if(TITLE != null)
    //    titles.add(TITLE);
    public String getcoauthor(){
        return coauthor;
       public String gettitle(){
        return title;
       public int getTitleCount(){
           return titles.size();
         public void printcoauthors(String currentauthor){
         //Extractdata ed = new Extractdata();
        // Coauthorship c = new Coauthorship(ed.getname1(), ed.getname2(), ed.getTITLE());
         if(currentauthor.equals(getauthor()))
             System.out.println(getcoauthor());
         else if (currentauthor.equals(getcoauthor()))
             System.out.println(getauthor());
         System.out.println(gettitle());
         System.out.println("Hello is this thing on?");
}and here is where the values are coming from in Class Extractdata
//Checks if the document was cowritten
                if(authors.getLength() > 0)
                            for(int z = 0; z < authors.getLength(); z++){
                           //Begin with the second author so not to include the author in the list of coauthors
                                    for(int w = 1; w < authors.getLength(); w++){
                                        Coauthorship coauthorship = null;
                                        //Ensures that the author is not counted as a co-author
                                        if(z != w){
                                            name1 = names[z];
                                            name2 = names[w];
                                            Coauthorship c = new Coauthorship(name1, name2, TITLE);
                                            c.setname(name1);
                                            c.setcoauthor(name2);
                                            c.settitle(TITLE);
                            }Thanks so much for everyones help so far

One thing to remember is that when you write:
Coauthorship c = new Coauthorship(name1, name2, TITLE);
Coauthorship c is creating a reference variable that points to an object that is of class type Coauthorship. It is NOT the object itself. It only points to the object in question.
It is the new Coauthorship(...) that actually creats the object in memory. So each time through the loop you are asking for a new Coauthoriship object and a new reference to that new object. Of course, Java (meaning the JVM) may (or always will - not sure here) re-use the reference variable at the same memory location. You loose the reference to each object create in the previous loop iteration leaving you with a reference pointing to the last object created in the loop when the loop ends.
If you could state in plain English what your goal is, that would help. From your code, I can tell that the goal (or problem domain) is not clear. Or at least, how to achieve that goal is not clear. State the requirements using ergular words (not psuedo code or such) that would help get things a little clearer.

No instances can be created from abstract classes

Dear SAPGurus,
I have developed a oData Service in my backend system & able to register the service in the gateway hub system. When i try to execute the metadata of the service from gateway system i am able to see the metadata with list of entity types availble in the data model.
But when i try to execute with entity set i am getting the following error.
"The class 'ZCL_ZGRC_DATA_MODEL_DPC' is abstract. No instances can be created from abstract classes."
Where my data model provider class name is 'ZCL_ZGRC_DATA_MODEL_DPC'
Kindly help me.
Thanks & Regards,
Rumeshbabu S

Hello Rumesh,
I do not think the error which u are getting is because of System Alias setting in SPRO.
Its something else which is really strange.
However the below is the setting to be maintained in GW SPRO system alias when u have a environment setup like u have now.
I mean the way u have created service and registered -
In ECC system u have created service using builder.
In GW system u have registered it and trying to access now via an RFC destination.
We have the same setup like u have now and we do not have any issues. We have also maintained the System Alias like i have shared in screen shot.
Check your System Alias config once in SPRO. But i dont think this is causing problem in your case. Still check once.
As per my understanding, from GW its trying to hit the DPC class and hence i feel system alias setting is correct in your case.
Problem is something else which is really strange.
Check error logs and see if it can. Share the error log please.
Regards,
Ashwin

Creating an instance of a class with no default constructor

Hello gurus,
I wrote my own serialization and RMI protocol for both C++ and Java that follows closely what the default Java version does. I'm trying to recreate an object on the Java side that was sent over the wire. The first step is to create an instance of the class. How do I create an instance of a class that has no constructor (i.e. the only instances are static, created by the class itself and returned by static methods) or one that has no default constructor (like Integer)? The Java serialization seems to support it but the reflection API doesn't seem to have any support for this (i.e. Class::newInstance() and Constructor::newInstance()). It seems that through the standard API you can only create an object via one of its constructors. There must be a "hidden" method somewhere that allows the Java serialization to create an object without calling a constructor - where is it?
Dominique

There must be a "hidden" method
somewhere that allows the Java serialization to create
an object without calling a constructor - where is
it?You are correct, the way in which the Serialization creates Objects is "hidden" deep within the runtime.
If it were not hidden, you would be able to find it, and use it to violate the integrity of the VM.

Creating an instance of a class at runtime?

Does anyone know how to create an instance of a class at RunTime? For example, I want to load classes from a JAR file at RunTime, and then create instances of certain classes of each JAR. I ask this because I do not see how to create an instance of one of those classes the traditional way, SomeClass var = new SomeClass(). I am pretty sure that someone out there has done this and succeeded in doing it. All of the post on this stuff only talk about loading the class from a JAR file, but I have already loaded them using URLClassLoader�s findClass() method. I have also created an instance of the class that findClass() returns using newInstance(), but newInstance() returns an object of type Object. How can I convert this object to an object of type SomeClass? You cannot cast it because the compiler will complain due to the import statement issue. So if you cannot include the import statement because that classpath does not exist, then how the heck would you cast the newInstance() object into a SomeClass object?

You can cast the returned object to the type you need...that is what I do in my applet. The trick is that you must get the instance of the applets class loader (or you get a classCastException). Pay attention to this line below - that's the real key here.
"// Get a reference to the applets own classloader"
protected CBaseQuestionnaireFile m_BaseObject = null;// declared up front
m_BaseObject = loadAndRunClass("com.cpm.dataentry.questionnaire.CQuestionnaireFile");// fully qualified base object
Here is the load and run method:
   CBaseQuestionnaireFile loadAndRunClass(String classname)
      com.cpm.common.base.CBaseQuestionnaireFile questBase = null;
      Class cClass = null;
      try
         // first we open the jar file with the classes we need
         String[] aJarList = new String[10];
         // Questionnaire format file
         File fURL1 = new File(GetMainFrame().m_strQuestionnaireFileName);
         URL url1   = new URL(fURL1.toURL(),"");
         URL urlNew = new URL("jar:" + url1.toExternalForm() + "!/" );
         // Server base class directory
         String strServerDirectory = "http://" + GetMainFrame().m_strHost + "/APPLETS/";
         File fURL2 = new File(strServerDirectory);
         URL url2 = new URL(fURL2.toURL(),"");
         URL urlNew2 = new URL("jar:" + url2.toExternalForm() + "!/" );
         // Local base class directory
         String strLocalDirectory = CSystem.GetBasePath() + "/Research/bin/";
         File fURL3 = new File(strLocalDirectory);
         URL url3 = new URL(fURL3.toURL(),"");
         URL urlNew3 = new URL("jar:" + url3.toExternalForm() + "!/" );
         File fURLBase = new File(CSystem.GetBasePath() + "/Research/bin/base.jar");
         URL urlBase = new URL(fURLBase.toURL(),"");
         URL urlNewBase = new URL("jar:" + urlBase.toExternalForm() + "!/" );
         File fURLControl = new File(CSystem.GetBasePath() + "/Research/bin/controls.jar");
         URL urlControl = new URL(fURLControl.toURL(),"");
         URL urlNewControl = new URL("jar:" + urlControl.toExternalForm() + "!/" );
         File fURLUtil = new File(CSystem.GetBasePath() + "/Research/bin/utlities.jar");
         URL urlUtil= new URL(fURLUtil.toURL(),"");
         URL urlNewUtil = new URL("jar:" + urlUtil.toExternalForm() + "!/" );
         // Determine where to look
         URL[] urlList = null;
         if(GetMainFrame().m_isStandalone == false) {
            // From a browser
            CSystem.PrintDebugMessage("Running as an applet");
            if(GetMainFrame().m_bOnLineMode == true) {
               // On line
               CSystem.PrintDebugMessage("*** On Line Mode ***");
               urlList = new URL[2];
               urlList[0] = urlNew;
               urlList[1] = urlNew2;
            else {
               // Off line
               CSystem.PrintDebugMessage("*** Off Line Mode ***");
               urlList = new URL[4];
               urlList[0] = urlNew;
               urlList[1] = urlNewBase;
               urlList[2] = urlNewControl;
               urlList[3] = urlNewUtil;
          else {
             CSystem.PrintDebugMessage("*** Stand Alone Mode ***");
             urlList = new URL[1];
             urlList[0] = urlNew;
CSystem.PrintDebugMessage("Question file/path: " + GetMainFrame().m_strQuestionnaireFileName);
        // Set the wait cursor
        GetMainFrame().SetWaitCursor();
        // Get a reference to the applets own classloader
        Class myClass = getClass();
        ClassLoader appletClassLoader = myClass.getClassLoader();
        // Call our multi-jar class loader
        JarClassLoader jarLoader = new JarClassLoader(urlList,appletClassLoader);
CSystem.PrintDebugMessage("CPM Test - passed Jar Loader" + jarLoader.toString());
         // Load the classname from the jarfile
         try
              cClass = jarLoader.loadClass(classname);
         catch(ClassNotFoundException cnfe)
            Object[] optionsConfirm = { "Ok" };
            JOptionPane.showOptionDialog(GetMainFrame(),"Questionnaire file is either damaged or has been tampered with.", "Questionnaire File Error",
            JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE, null, optionsConfirm, optionsConfirm[0]);
            GetMainFrame().m_strQuestionnaireFileName = "";
            // Clear the wait cursor
            GetMainFrame().ClearWaitCursor();
            return null;
         Class cSuperclass = cClass.getSuperclass();
CSystem.PrintDebugMessage("Test Superclass type is: " + cSuperclass.toString());
         Object o = cClass.newInstance();
CSystem.PrintDebugMessage("Test plain class type is: " + o.toString());
         // Never remove this line of code
         // without it, a crafty user could use our load routine
         // to load/and run some nasty code
         // This test makes SURE that *ONLY* questionnaires get opened
         // and their methods get called
         if(o instanceof com.cpm.common.base.CBaseQuestionnaireFile)
            // Create the object
CSystem.PrintDebugMessage("Test Is instance of CBaseQuestionnaireFile");
CSystem.PrintDebugMessage("CPM Test - Casting to Base Class");
            questBase = (com.cpm.common.base.CBaseQuestionnaireFile)o;
CSystem.PrintDebugMessage("CPM Test - Getting languages from questionnaire");
            GetMainFrame().GetLanguagesFromQuestionnaire(questBase);
CSystem.PrintDebugMessage("CPM Test - Setting locale from Questionnaire selection");
            questBase.SetQuestionnaireLocale(GetMainFrame().m_locale);
CSystem.PrintDebugMessage("CPM Test - Initializing Questionnaire");
            questBase.Initialize();
            questBase.InitializeCards();
          else
            Object[] optionsConfirm = { "Ok" };
            JOptionPane.showOptionDialog(GetMainFrame(),"Questionnaire file is either damaged or has been tampered with.", "Questionnaire File Error",
            JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE, null, optionsConfirm, optionsConfirm[0]);
            GetMainFrame().m_strQuestionnaireFileName = "";
            // Clear the wait cursor
            GetMainFrame().ClearWaitCursor();
            return null;
      catch (Exception e)
          exDialog.showForThrowable(e.toString(),e);
     // Clear the wait cursor
     GetMainFrame().ClearWaitCursor();
     // Set MouseListener Pointer
//     questBase.SetMouseListenerPointer(GetMainFrame().m_mouseListener);
     return questBase;
   }

To create an instance class Bean

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