Servlet class creating multiple objects

Hi
I am using WSAD 5.0. My servlet is acting as a controller but when when i m invoking the servlet from 2 JSPs , server is creating 2 objects for that servlet because of which i m not able to get the values which was set by the first servlet object..
Can somebody tell me why the server is creating 2 objects for my servlet.
Alok

No.. its is invoked only once.
If an instance of the servlet does not exist, the Web container
Loads the servlet class.
Creates an instance of the servlet class.
Initializes the servlet instance by calling the init method. Initialization is covered in Initializing a Servlet.
Invokes the service method, passing a request and response object. Service methods are discussed in the section Writing Service Methods.
http://java.sun.com/j2ee/tutorial/1_3-fcs/doc/Servlets4.html
MeTitus

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How do I create multiple objects during runtime?

I don't know how to create multiple objects during runtime, here's my problem:
I get a String as input. Then I create an object called newobject. I put the object in a hashtable with the above string as key.
Then comes the problem, in order to create a new object, I have to rerun the same class, which uses the same name (newobject) to create a 2nd object. Now my hashtable doesn't reference to my 1st object anymore...
Is there anyway I can fill up the hashtable with different objects, and make each key point to each object it was supposed to?
For those who want to see a bit of the program:
public class PlayBalloon{
public Hashtable ht = new Hashtable();
for(){
Balloon pB = newBalloon;
newBalloon=new Balloon(pB);
ht.put("Some input from user", newBalloon);
for(){
ht.get(s).draw;<= s=string, draw=own meth. in Balloon
}

I think i can see the problem that you are having. You have, in effect, duplicate keys in your hashtable - ie, two strings used as keys with the same name.
The way that a hashtable works is as follows...
When you ask for a value that is mapped to a key it will go through the table and return the first occurence it finds of the key you asked for. It does this by using the equals() method of whatever object the key is (in your case it is a String).
If you cant use different Strings for your keys in your hashtable then i would consider writing an ObjectNameKey class which contains the String value that you are trying to put in the hashtable and an occurrence number/index or something to make it unique. Remember to override the equals method in your ObjectNameKey object or else the hash lookup will not work. For example
class ObjectNameKey {
    private String name;
    private int occurence;
    public ObjectNameKey(String name, int occ) {
        this.name = name;
        this.occurence = occ;
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        return name;
    public String getOccur() {
        return occurence;
    public boolean equals(Object o) {
        if (!(o instanceof ObjectNameKey)) {
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Updation problem while creating multiple objects from enterprise portal

Hi All,
From enterprise portal i am calling an RFC 'BAPI_PROJECT_MAINTAIN' to create objects .
While trying to create multiple objects simultaneously it gives error "sapuser is currently using, can't be created".
It seems like as i am creating multiple objects by calling RFC repeatedly , while the first one is not updated fully i am sending the second value to be processed.
Pl. tell me how to overcome this. Do I need to add any sleep time in EP or any other method is there in SAP to overcome this situation.
thanks
sandeep

Dear Sandeep,
I have discussed this problem with EP team lead in my organisation, i have given your email id to him he will forward the solution on your id.
If usefull reward points helpfull....
Regards,
Rajneesh Gupta

How to create multiple objects within a class

I have a item.lvclass which has an item.ctl (contains a cluster of class private data). I need to add another object (item2.ctl) within that same class so that I can reuse the code for that class.
So how do you create additional objects within the same class?

Well... right now... I've cornered myself going down this path: http://forums.ni.com/t5/LabVIEW-Idea-Exchange/LVOOP-Interfaces/idc-p/1314637#M8918
Seems like the solution in the idea was not implemented yet....
Okay. I will try to describe the situation differently...
Let's say I have a Car.lvclass
I want to have two objects: sedan & roadster
both have similar properties, but also have different properties:
4 doors vs 2 doors
hardtop vs convertible
silver vs white (color)
I want the two objects to be of the same class so that they can share the same private and public VI's. As a matter of fact, I want to have both objects in the VI's within the Car.lvclass.

How many methods copies will create when i create multiple objects

Hi
I have big doubt in java. See the following Program
class A{
public int i;
public static int j;
public void methodOne(){
Sytem.out.println("Welcome");
public static void methodTwo(){
System.out.println("Welcome methodOne");
class B{
public static void main(String[] args){
A obj = new A();
A objOne = new A();
A objTwo = new A();
In this program how many method copies and variable copies will create when i create mulitiple objects. I am sure that only one copy j variable and methodTwo method (becz both are static) for all the objects. what about the method methodOne and i. Here how many copies will create. Could you please explain this concept very clearly.
Thanks and Regards
Sherin Pooja

Sherin wrote:
Sorry I pasted the previous comment with table format. Here the table format is not working
Local variables---Stack
Instance/Member/field variables---Heap
Class/static variables---Static Memory
Methods---Methods do not live on the heap or stack.Incorrect. Methods live in the method area, which is "logically part of the heap," according to the JVM spec.
Instance/Member/field variables---It will create and destroy according to object initialization and destroy.That's very poor English and doesn't really capture what happens.
policyHolder = new PolicyHolder(); //Dynamic objects will be stored in the heap.
All objects are stored in the heap. There's no distinction between "dynamic" and "static."
Class/static variables---Static variables are created when the program starts and destroyed when the program stops.Wrong. They are created when the class is loaded and destroyed when it is unloaded.
I don't know where you got all this information from, but I recommend you don't use that site. Much of it is just plain wrong, and the rest is very poorly written and imprecise.

Creating Multiple Objects

Hi all,
This is a follow on to, and hopefully a more constructive question than my last. To make it simpler, each time a user clicks a button, I want a new JPanel to be created. I want each panel to be named panel1, panel2, panel3, and so on as the button is clicked again and again. How might I do this? Thanks!
Sincerely,
James

legsmacgee wrote:
I love this forum, everyone is so sarcastic. Seriously, I love it. Anyway, I don't care if its crowded, the solution to this problem will help fix another more complicated one.I'm not trying to be sarcastic, just trying to see if you've thought through your question. Here's a demo:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class LotsOfPanels implements ActionListener {
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        EventQueue.invokeLater(new Runnable(){
            public void run() {
                launchGUI();
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        south.add(addButton);
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        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setSize(800,600);
        f.setLocationRelativeTo(null);
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    public void actionPerformed(ActionEvent evt) {
        String text = "Panel added at " + new java.util.Date();
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        p.setBorder(BorderFactory.createTitledBorder(text));
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}

Create a script to create multiple objects without using execute immediate.

I have a function that requires several objects (4 types, 8 functions) to run. Right now they're in separate sql files. I'd like to combine them into one file that I would run but I'd rather not use the 'execute immediate' since it seems like you have to escape quotes and the like.
How would you do that?
Thanks in advance,
J

Yeah I thought about that but I'd like them all to be in one file.
I believe I figured it out though. (about 20m after I posted no less)
Adding a '/' on it's own line after each block of code appears to do the trick. I just have to write a bit of code to drop a dependent type if it exists.
J

Live Migration between two WS2012 R2 Clusters with SCVMM 2012 R2 creates multiple objects on Cluster

Hi,
I'm seeing an issue when migrating VM's between two 2012 R2 Hyper-V Clusters, using VMM 2012 R2, that have their Storage provided by a 4 Node Scale Out File Server Cluster that the two clusters share.
A migration between the two clusters is successful and the VM is operation but I'm left with two roles added to the cluster the VM has moved to instead of the expected one.
For example: Say I have a VM that was created on cluster A with SCVMM, resulting in a name of : "SCVMM Test-01 Resources"
I then do a live migration to Cluster B which has access to the same storage and then I end up with two new roles instead of one.
"SCVMM abw-app-fl-01 Resources" and "abw-app-fl-01"
The "SCVMM abw-app-fl-01 Resources" is left in an unknown state and "abw-app-fl-01" is operational.
I can safely delete "SCVMM abw-app-fl-01 Resources" and everything still works but it looks like something is failing during the process.
Has anyone else seen this?
I'll probably have one of my guys open a support ticket in the new year but was wondering if anyone else is seeing this.
Kind regards,
Jas :)

In my case the VMs where created in VMM in my one and only Hyper-V cluster (that's been created and is managed by VMM).
All Higly Available VM:s have a FCM role named "SCVMM vmname" where vmname is the name if the VM in VMM. On top of that a lot
of VM:s, but not all, have a second role name named vmname. Lots of name in that sentence.
All VMs that have duplicates are using the role named vmname.
I thought it had to do with whether a VM had been migrated so I took one that never had been migrated and did. It did not get a duplicate.
Is there any progress on this?

Hi Kamran, I am new to Forte, what do you mean by a service object creating multiple objects. Can you elaborate more please ? Thankx in advance

Please stop posting questions like this. This forum is not ment to be used for one to one conversation. Or use the original question and answer my answer. Or email mail me directly at [email protected]
thanks
ka

Multiple objects created in loop

How do I create multiple objects for the same class with a loop
I can hard code the names in but I want to allocate names from an array as the names
ie
BankAccount Acct(NameArray[0]) = new BankAccount();
to get
AcctFred.method();
and access this in a loop
I know if can be done but how??
Regards, Cat

Another variation:
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   // Creates the accounts and stores them in the hash table
   HashTable hAccounts = new HashTable();
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hAccounts.put(names[i], account);
// Retrieves an account by its name
Account account = (Account)hAccounts.get("John");
Hope this helped,
Regards.

Create multiple JLabel object

hi i have create an application that load multiple image from file JLabel using the for loop beause everytime the for loop will create a new JLabel imageJLabel() therefore i would like to know is that anyway that i could create multiple object JLabel like this
for(int i=0;i<count;i++)
JLabel imageLabel + i = new JLabel();
i hope to do it like this
JLabel imageLabel1 = new JLabel();
JLabel imageLabel2 = new JLabel();
JLabel imageLabel3 = new JLabel();
This is the code:
try
while(rs.next())
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System.out.println("The numbers of records " + count);
}catch(SQLException sqlex)
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howPicPanel.setLayout(new GridLayout(count,1,5,5));
showRatePanel.setLayout(new GridLayout(count,1,5,5));
for(i=0;i<count;i++)
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Icon teampic = new ImageIcon("image/image.gif");
imageLabel.setIcon(teampic);
imageLabel.setText(String.valueOf(tName.elementAt(i)));
imageLabel.setToolTipText(String.valueOf(tName.elementAt(i)));
showPicPanel.add(imageLabel);

for(int i=0;i<count;i++)
JLabel imageLabel + i = new JLabel();
}Won't work, but this will:
JLabel [] labels = new JLabel[count];
for( int i=0; i<count; i++ ) {
labels[i] = new JLabel();

Javascript notifications to Flex on Multiple objects

Hi,
I know that with ExternalInterface, we can register ActionScript functions that will be callable from JavaScript, But i want to register actionscript function for of one class which has multiple instance created in the Application. So how it will recognize which object action script function will called from java script.
For example :
1) Java script : Has function javaScripAlert() which call Action script function showAlert();
Ie testSwf.alert(value);
function javaScripAlert (value) {
TestSwf.alert();
2) Class ABC has call back function showAlert (value); It register callback function “showAlert” in class ..
Ie . ExternalInterface. addCallback(“alert”, showAlert);
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<ns1:ABC id=”abc1” />
<ns1:ABC id=”abc2” />
<ns1:ABC id=”abc3” />
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So is any way that function of other object also called at that time .
Thanks & Regards,
Sanjay Ruparelia

With ExternalInterface, you can register ActionScript functions that will be callable from JavaScript, so you can set up your JS callbacks to trigger calls into your Flex app to update the status.

Can I put multiple object placeholder in Master slide?

I would like to know if I can creat multiple object placeholder in Master slide or not. After searching the disccusion, seems that this problem occur since Keynote 03 and is not improved till Keynote 09 now. In fact, I would like to make a slide show of multiple photos, but I would like to arrange several photos in one slide and exactly the same position and size in each slide. So, it would be easiler if I can make a master slide with mulitple object placeholders. Can anyone help or if there is any alternative ways? Thank you.

Apple Maps is not a GIS application. It might be one day. For now, you will have to use ArcGIS or something similar.

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 multiple TYPES of objects from one menu?

Q: How can I create a single class to create objects of multiple 'object classes' in a way that is not a huge switch statement?
Explaination:
Let's say that I have an application that I am building, that manages five hundred object types. A properly-built object subclassing tree is created, and I want to be able to create objects of any 'leaf node' of this subclassing tree using a single 'objectCreate()' method in a 'factory object'. The purpos of this method will be to create an instance of the correct object, pass a handle to a few collections for properly sorting and storing these objects in groups.
Usually, one could create a switch in this function, testing for the type of object that the user wants to create from the menu. But in the case of having hundreds of possible object choices, this becomes harder and harder code to maintain (let alone performance).
Any suggestions?

But if my menu has:
1. German Shepard
2. Doberman Pinscher
3. Malamut
4. Persian Long-hair
5. Siamese
6. Tabby
And my object class tree goes:
                              [ Animal ]
             [ Cat ]                              [ Dog ]
[ various breeds ]                         [ various breeds ]How do I code the menu class to respond to the input, so that it runs the correct [breed] object's constructor?
The line:
Animal choice = new xxxxxxxx();
I can't use a variable to replace 'xxxxxxxx' in run-time, but having a ton of choices in code sounds/looks unreasonable.
if (choice == "Doberman Pinscher")
Animal choice = new doberman();
else if (choice == "Tabby")
Animal choice = new tabby();
Do you see what I am trying to avoid? I am not experienced enough to instantly realize how to avoid the latter, and instead, do a single instantiation command for the correct constructor.

Servlet class creating multiple objects

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