Dealing with different classes.

How do i switch from one class to another class, after the first has done its thing?

You don't "switch" from one class to another.
Methods in one class can call methods in another. Your main class' main() method is where things start (for standalone apps). It calls other methods in the same class or other classes, which in turn call others, etc. When main is done, your program is done (sort of).
Your question's not very clear. Maybe you could clarify. Or maybe going through a tutorial or text will help clear up your confusion.
Sun's basic Java tutorial
Sun's New To Java Center. Includes an overview of what Java is, instructions for setting up Java, an intro to programming (that includes links to the above tutorial or to parts of it), quizzes, a list of resources, and info on certification and courses.
http://javaalmanac.com. A couple dozen code examples that supplement The Java Developers Almanac.
jGuru. A general Java resource site. Includes FAQs, forums, courses, more.
JavaRanch. To quote the tagline on their homepage: "a friendly place for Java greenhorns." FAQs, forums (moderated, I believe), sample code, all kinds of goodies for newbies. From what I've heard, they live up to the "friendly" claim.
Bruce Eckel's Thinking in Java (Available online.)
Joshua Bloch's Effective Java
Bert Bates and Kathy Sierra's Head First Java.
James Gosling's The Java Programming Language. Gosling is
the creator of Java. It doesn't get much more authoratative than this.

Similar Messages

What is the best way to deal with different audio sample rates on the same timeline ?

what is the best way to deal with different audio sample rates on the same timeline ?

You don't have to do anything special. If possible, start your project with a clip that has the desired target frame rate and audio sample rate, and your project parameters will be set automatically. Other sample rates will be converted under the covers.
For example, if your video is shot at 48khz, you can add music files at 44.1khz with no problem.
If you are recording audio that you want to synch with video (multicam), you will get best results if everything is 48khz, but you can use 44.1 if that is all you have. Once I forgot to reset my Zoom to 48,000 and it still worked.

Dealing with abstract classes and interfaces with XMLBeans

I'm quite new to XMLBeans and would like some help. I've got things working when
you are only saving concreate classes as XML, but when it comes to clesses containing
interfaces I am running into problems.
I basically have a collection of XY objects (see below) that I want to save as
XML.
I want to convert the following java classes to an xml schema:
public class XY{
X x;
Y y;
public interface X{
void setA(int a);
int getA();
public interface Y{
void setB(int b);
int getB();
public class X1 implements X{
void setA(int a);
int getA();
//other data to save
public class X2 implements X{
void setA(int a);
int getA();
//other data to save
public class Y1 implements Y{
void setB(int b);
int getB();
//other data to save
public class Y2 implements Y{
void setB(int b);
int getB();
//other data to save
What would be the best way to convert these to XML Schema? I've looked through
all the XMLBeans documentation, but it doesn't say anything about dealing with
interfaces/abstract classes. Is there anywhere else to look?
Thanks in advance,
Andrew

Anurag,
What I really wanted was a work-around to using substiutionGroups as substitution
groups are not supported in this release.
I want to convert the following schema:
<xsd:complexType name="PublicationType">
<xsd:sequence>
<xsd:element name="Title" type="xsd:string"/>
<xsd:element name="Author" type="xsd:string" minOccurs="0" maxOccurs="unbounded"/>
<xsd:element name="Date" type="xsd:gYear"/>
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="BookType">
<xsd:complexContent>
<xsd:extension base="PublicationType" >
<xsd:sequence>
<xsd:element name="ISBN" type="xsd:string"/>
<xsd:element name="Publisher" type="xsd:string"/>
</xsd:sequence>
</xsd:extension>
</xsd:complexContent>
</xsd:complexType>
<xsd:complexType name="MagazineType">
<xsd:complexContent>
<xsd:restriction base="PublicationType">
<xsd:sequence>
<xsd:element name="Title" type="xsd:string"/>
<xsd:element name="Date" type="xsd:gYear"/>
</xsd:sequence>
</xsd:restriction>
</xsd:complexContent>
</xsd:complexType>
<xsd:element name="Publication" type="PublicationType"/>
<xsd:element name="Book" substitutionGroup="Publication" type="BookType"/>
<xsd:element name="Magazine" substitutionGroup="Publication" type="MagazineType"/>
<xsd:element name="BookStore">
<xsd:complexType>
<xsd:sequence>
<xsd:element ref="Publication" maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
to produce an XML file like:
<?xml version="1.0"?>
<BookStore ¡Ä>
<Book>
<Title>Illusions: The Adventures of a Reluctant Messiah</Title>
<Author>Richard Bach</Author>
<Date>1977</Date>
<ISBN>0-440-34319-4</ISBN>
<Publisher>Dell Publishing Co.</Publisher>
</Book>
<Magazine>
<Title>Natural Health</Title>
<Date>1999</Date>
</Magazine>
<Book>
<Title>The First and Last Freedom</Title>
<Author>J. Krishnamurti</Author>
<Date>1954</Date>
<ISBN>0-06-064831-7</ISBN>
<Publisher>Harper & Row</Publisher>
</Book>
</BookStore>
What is the best way to do this without using substitution types?
Thanks,
Andrew
"Anurag" <[email protected]> wrote:
Andrew,
Could you please paste/attach a sample of the code you are using to convert
Java bean classes to XMLBeans?
In the current release the goal of XMLBeans technology was to convert
from
XML Schemas or XML files to XMLBeans. The focus was not towards conversion
of Java beans to XMLBeans.
Regards,
Anurag
"Andrew" <[email protected]> wrote in message news:[email protected]...
I'm quite new to XMLBeans and would like some help. I've got thingsworking when
you are only saving concreate classes as XML, but when it comes toclesses
containing
interfaces I am running into problems.
I basically have a collection of XY objects (see below) that I wantto
save as
XML.
I want to convert the following java classes to an xml schema:
public class XY{
X x;
Y y;
public interface X{
void setA(int a);
int getA();
public interface Y{
void setB(int b);
int getB();
public class X1 implements X{
void setA(int a);
int getA();
//other data to save
public class X2 implements X{
void setA(int a);
int getA();
//other data to save
public class Y1 implements Y{
void setB(int b);
int getB();
//other data to save
public class Y2 implements Y{
void setB(int b);
int getB();
//other data to save
What would be the best way to convert these to XML Schema? I've lookedthrough
all the XMLBeans documentation, but it doesn't say anything about dealingwith
interfaces/abstract classes. Is there anywhere else to look?
Thanks in advance,
Andrew

ME51N : how to deal with different units of measure as defined in MM01?

Hi Folk,
Could you please help me ?
Some of our materials booked in stock are purchased by our purchasing department in Europe but as well by our purchasing department in US.
The base unit of measure of those materials are defined with KG (kilogram) in the masterdata file (MM01).
Why this is not allowed to enter a purchase requisition (ME51N) with other unit of measure than KG? My purchasing department in US is not able to work with kilogram and thus they need to enter the requisition with US units of measure (pounds).
However when we create purchase orders, we can play with other units of measure.
Does someone can explain to me how to create a PR with a unit of measure different from the default one? Or could you share your experience to bypass this issue. Note that we really would like to have the same material number both for Europe and US (with different plants and storage locations).
Thank you very much!
François.

Please check these answered links:
PR UOM
Re: Can't Change UOM in PR
Alternate UOM in PR & PO
Edited by: Afshad Irani on Jun 14, 2010 7:11 PM

Best way to deal with different screen sizes

Hi !
We have been a small company using java for our client ( http://www.topbridge.com ) . The Swing client has used panels with absolute positions so the client would fit in 800x600 screen. Since java is 'run everywhere' we would like to rewrite it so it also possible to run on smaller screens ( zaurus ) . Any suggestions about best way to do this? Is there any layout method that would try to fit everything within a given screen size?
Thank you!

The Swing client has used panels with absolute positions
Well there's your problem: your UI was written by someone who didn't know how to write a UI.
Always sketch your UI on paper, break it into logical sections rather than dealing with everything in one go (your code should break down accordingly in any case) and for each of those sections determine where space should be allocated when resizing - from this, the decision of which layout managers to use will fall out naturally.

What's the deal with Lazy Class Loading?

My understanding was that if class B is used in class A, (i.e. imported and used in local code), but class A does NOT
- extend class B
- implement class B
- have a field of class B's type or
- use class B in any of its methods signatures
then class B would not be loaded unless the localised code that uses it was executed.
However, I am of course finding that this is not the case.
So what's the deal?
Why are my classes being loaded when there's no code that uses them?

Okay, prepare for some gory details...
My actual code is slightly more complicated than A & B, but the context of the error is the same.
Here is what's happening:
The main method, in class A is creating an instance of A;
The constructor of A creates an instance of B;
The constructor of B calls a static method in C;
The static method in C creates an instance of C.
C contains an instance method M that creates an instance of inner class C.C1, however method M is NOT called from C's constructor, nor will it EVER be called in the (test) application.
Class C.C1 implements interface D.D1.
Neither of classes D or D.D1 are in the classpath (intentionally).
A NoClassDefFoundError is thrown, indicating that D.D1 could not be loaded, with the top method on the stack trace being (from memory) B.<init> (i.e. no mention of C, the only class that refers to D or D.D1).
My assumption was that C.C1 should never be loaded, because it is never used, or that, if it was loaded eagerly, no exception should be thrown until a point at which it is used.
Seeing as the inner classes and the inheritance can complicate things above, I commented out the code that uses C.C1 and D.D1, which results in the following sequence of events (which still fail):
The main method, in class A is creating an instance of A;
The constructor of A creates an instance of B;
The constructor of B calls a static method in C;
The static method in C creates an instance of C.
Difference is here:
C contains an instance method M that creates an instance of class D, however method M is NOT called from C's constructor, nor will it EVER be called in the (test) application.
Class D does not appear in any method signatures or as a field type.
Class D is not in the classpath (intentionally).
A NoClassDefFoundError is thrown, indicating that D could not be loaded, with the top method on the stack trace being B.<init> (i.e. no mention of C, the only class that refers to D).
Again, my assumption is that D should never be loaded, because the only method that uses it is never called.
Why is the JVM attempting to load D and telling me that it can't find it when the application never actually uses D?
Crazy stuff!

How to deal with different versions of Idocs in XI

Hi,
I am doing a scenario IDoc to IDoc but on both sides SAP versions are different say 5.0 and 4.6
I have done all the configuaration and it is working fine.
But in sxmb_moni getting "Outbinding"(this is not error)
and in attributes in trace it is saying "segment version"..
i guess while transporting to QA and Prod it might trigger some problems...
i could not find any docs properly in SDN......
could anyone give input how to deal situation like this?
regards.

HI Swarup,
thanx for the response.
i did the same thing...i imported 2 different versions into xi and used in mapping.and interface is working fine.
what i am concerned is : will there be any problem in future while transporting to different environments?
and why it is showing 'segment version' in attribute in Trace in sxmb_moni....
any inputs will be help full....
Thanx in advance.
regards.

How to deal with different Pixel Ratios?

Hi, I have a project in which I use two different pixel ratios (0.9) and (1.2). Now of course, they both look squished, and not only that but the exporting of the file is completely messed up, with black bars and still some squishiness. Does anyone know any easy way to fix this? I have hundreds of files which are of different pixel ratios. If they need to be the same ratio going in, how is it that I can BATCH convert them to the same one? Since it would be such a pain to do them individually. Thank you so much for your time!

First decide on your output format, 16x9 or 4x3. Once you have made that decision, create a sequence in that format and use scale to frame size in the preferences before importing those clips. Do not scale up to lose the black borders, unless you don't care about the quality.

Help With Multiple Class Objects With Methods

I am dealing with multiple classes. I am wondering why I am getting an error on this line it's by the bottom
          obj1.array() = newArray[i];
It gives the array out of bounds. On another note I believe I can change obj1 to just like incomingArray if I wanted correct since it's just a reference because I should be able to do this method sort on any array.
method : selSort
input - none
output - void
This is where we sort the arary
Pseudocode Code:
1 Initialize variable oldlocation to hold spot of smallest number in original array
2 Initialize variable smallnumber to store smallest number in original array
3 Initialize new integer array
4 Set new array length to length of original array
5 Initialize variable length to store lengh of new array
6 For i = 0 and continue till i < new array length
6.1 Find smallest number in original array
6.2 Put the smallest number in new array
6.3 Remove smallest number from original array
7 Copy contents of new array that is sorted to original array
Basic concept is to repetitively find the smallest
(or largest) item in the original array. Once smallest
is found, move it to the next spot in a new array and
remove it from the old array.
public void selSort ()
     int oldlocation = 0;
     int smallnumber = 0;
     int [] newArray = obj1.array();
     newArray = new int [obj1.length()];
     int length = newArray.length;
     for (int i = 0; i < newArray.length; i++)
//          System.out.println("Test 1");
          newArray[i] = obj1.sortSmall();
//          System.out.println("Test 2");
          smallnumber = obj1.sortSmall();
//          System.out.println("This is the smallest number " + smallnumber);
          oldlocation = obj1.location(smallnumber);
//          System.out.println("This is the old location " + oldlocation);
//          System.out.println("Test 3");
          obj1.removeLocation(oldlocation);
//          System.out.println("Test 4");
     System.out.println();
     System.out.println("The sorted array looks like");
     for (int k = 0; k < newArray.length; k++)
          System.out.print(newArray[k] + " ");
     System.out.println();
     System.out.println();
     obj1.resize(newArray.length);
     for (int i = 0; i < newArray.length; i++)
          obj1.array()[i] = newArray[i];
     return;

method : selSort
input - none
output - void
This is where we sort the arary
Pseudocode Code:
1 Initialize variable oldlocation to hold spot of smallest number in original array
2 Initialize variable smallnumber to store smallest number in original array
3 Initialize new integer array
4 Set new array length to length of original array
5 Initialize variable length to store lengh of new array
6 For i = 0 and continue till i < new array length
6.1 Find smallest number in original array
6.2 Put the smallest number in new array
6.3 Remove smallest number from original array
7 Copy contents of new array that is sorted to original array
Basic concept is to repetitively find the smallest
(or largest) item in the original array. Once smallest
is found, move it to the next spot in a new array and
remove it from the old array.
public void selSort ()
     int oldlocation = 0;
     int smallnumber = 0;
     int [] newArray = obj1.array();
     newArray = new int [obj1.length()];
     int length = newArray.length;
     for (int i = 0; i < newArray.length; i++)
//          System.out.println("Test 1");
          newArray[i] = obj1.sortSmall();
//          System.out.println("Test 2");
          smallnumber = obj1.sortSmall();
//          System.out.println("This is the smallest number " + smallnumber);
          oldlocation = obj1.location(smallnumber);
//          System.out.println("This is the old location " + oldlocation);
//          System.out.println("Test 3");
          obj1.removeLocation(oldlocation);
//          System.out.println("Test 4");
     System.out.println();
     System.out.println("The sorted array looks like");
     for (int k = 0; k < newArray.length; k++)
          System.out.print(newArray[k] + " ");
     System.out.println();
     System.out.println();
     obj1.resize(newArray.length);
     for (int i = 0; i < newArray.length; i++)
          obj1.array() = newArray[i];
     return;

XmlDataProvider .... is gone completely in my Xaml file. Why? How many different ways to deal with xml data source through WPF

I followed a procedure described in a book.
1. insert "Inventory.xml" file to a project "WpfXmlDataBinding" .
2. add the XML data source through the data panel of "blend for 2013", named it "InventoryXmlDataStore" and store it in the current document.
3. dragged and droppped the nodes from the Data panel onto the artboard.
Then I checked my Xaml file against the one provided by the book
Xaml file by the book:
<Window.Resources>
<XmlDataProvider x:Key="InventoryDataSource"
Source="\Inventory.xml"
d:IsDataSource="True"/>

<DataTemplate x:Key="ProductTemplate">
<StackPanel>
<TextBlock Text="{Binding XPath=@ProductID}"/>
<TextBlock Text="{Binding XPath=Cost}"/>
<TextBlock Text="{Binding XPath=Description}"/>
<CheckBox IsChecked="{Binding XPath=HotItem}"/>
<TextBlock Text="{Binding XPath=Name}"/>
</StackPanel>
</DataTemplate>
</Window.Resources>
<Grid>
<ListBox HorizontalAlignment="Left"
ItemTemplate="{DynamicResource ProductTemplate}"
ItemsSource="{Binding XPath=/Inventory/Product}"
Margin="89,65,0,77" Width="200"/>
</Grid>
my Xaml file:
<Window x:Class="WpfXmlDataBinding.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="922" Width="874">
<Window.Resources>
<DataTemplate x:Key="ProductTemplate">
<StackPanel>
<TextBlock Text="{Binding XPath=@ProductID}"/>
<TextBlock Text="{Binding XPath=Cost}"/>
<TextBlock Text="{Binding XPath=Description}"/>
<CheckBox IsChecked="{Binding XPath=HotItem}"/>
<TextBlock Text="{Binding XPath=Name}"/>
</StackPanel>
</DataTemplate>
</Window.Resources>
<Grid DataContext="{Binding Source={StaticResource InventoryXmlDataStore}}">
<ListBox HorizontalAlignment="Left" Height="370"
ItemTemplate="{DynamicResource ProductTemplate}"
ItemsSource="{Binding XPath=/Inventory/Product}"
Margin="65,55,0,0" VerticalAlignment="Top" Width="270"/>
</Grid>
</Window>
All looks quite the same except the <XmlDataProvider ....> part under <Window.Resources>, which is gone completely in my Xaml file.
1, Why?
2, How many different ways to deal with xml data source through WPF?
Thanks, guys.
(ps My "WpfXmlDataBinding" runs without problem through.)

Never do yourself down Richard.
Leave that to other people.
It's quite common for smart developers to think they're not as good as they are.
I coach a fair bit and it's a surprisingly common feeling.
And to repeat.
Never use anything ends .. provider. They're for trivial demo apps. Transform xml into objects and use them. Write it back as xml. Preferably, use a database.
You want to read a little mvvm theory first.
http://en.wikipedia.org/wiki/Model_View_ViewModel
Whatever you do, don't read Josh Smiths explanation. I used to recommend it but it confuses the heck out newbies. Leave that until later.
Laurent Bugnion did a great presentation at mix10. Unfortunately that doesn't seem to be working on the MS site, but I have a copy. Download and watch:
http://1drv.ms/1IYxl3z
I'm writing an article at the moment which is aimed at beginners.
http://social.technet.microsoft.com/wiki/contents/articles/30564.wpf-uneventful-mvvm.aspx
The sample is just a collection of techniques really.
I have a sample which involves no real data but is intended to illustrate some aspects of how viewmodels "do stuff" and how you use datatemplates to generate UI.
I can't remember if I recommended it previously to you:
https://gallery.technet.microsoft.com/WPF-Dialler-simulator-d782db17
And I have working samples which are aimed at illustrating line of business architecture. This is an incomplete step by step series but I think more than enough to chew on once you've done the previous stuff.
http://social.technet.microsoft.com/wiki/contents/articles/28209.wpf-entity-framework-mvvm-walk-through-1.aspx
The write up for step2 is work in progress.
https://gallery.technet.microsoft.com/WPF-Entity-Framework-MVVM-78cdc204
Hope that helps.
Recent Technet articles: Property List Editing;
Dynamic XAML

How do I call methods with the same name from different classes

I have a user class which needs to make calls to methods with the same name but to ojects of a different type.
My User class will create an object of type MyDAO or of type RemoteDAO.
The RemoteDAO class is simply a wrapper class around a MyDAO object type to allow a MyDAO object to be accessed remotely. Note the interface MyInterface which MyDAO must implement cannot throw RemoteExceptions.
Problem is I have ended up with 2 identical User classes which only differ in the type of object they make calls to, method names and functionality are identical.
Is there any way I can get around this problem?
Thanks ... J
My classes are defined as followes
interface MyInterface{
     //Does not and CANNOT declare to throw any exceptions
    public String sayHello();
class MyDAO implements MyInterface{
   public String sayHello(){
          return ("Hello from DAO");
interface RemoteDAO extends java.rmi.Remote{
     public String sayHello() throws java.rmi.RemoteException;
class RemoteDAOImpl extends UnicastRemoteObject implements RemoteDAO{
     MyDAO dao = new MyDAO();
    public String sayHello() throws java.rmi.RemoteException{
          return dao.sayHello();
class User{
   //MyDAO dao = new MyDAO();
   //OR
   RemoteDAO dao = new RemoteDAO();
   public void callDAO(){
          try{
          System.out.println( dao.sayHello() );
          catch( Exception e ){
}

>
That's only a good idea if the semantics of sayHello
as defined in MyInterface suggest that a
RemoteException could occur. If not, then you're
designing the interface to suit the way the
implementing classes will be written, which smells.
:-)But in practice you can't make a call which can be handled either remotely or locally without, at some point, dealing with the RemoteException.
Therefore either RemoteException must be part of the interface or (an this is probably more satisfactory) you don't use the remote interface directly, but MyInterface is implemented by a wrapper class which deals with the exception.

Help with menus and variables in different classes.

1) how do I change variables in different classes? My situation..
I have a few tabbed panels/planes, that ask for different user inputs. I want the last tabbed panel/plane to have the inputs on 1 plane. Is that confusing?
Code:
        JTabbedPane tp = new JTabbedPane();
        tp.addTab ("Kitchen", new KitchenPanel());
        tp.addTab ("Living Room", new LivingRoomPanel());
        tp.addTab ("Master Bedroom", new MasterBedPanel());
        tp.addTab ("Bedroom 1", new Bedroom1Panel());
        tp.addTab ("Bedroom 2", new Bedroom2Panel());
        tp.addTab ("Misc Use", new MiscPanel());
        tp.addTab ("Totals", new TotalsPanel());not the full thing obviously, but just so u see what im working with.
2) How do popup menus work? I have a menu (File -> About | File -> How to Contact)
I want The File->About menu item, to prompt a dialog
The File -> How to to prompt a dialog
Contact Menu(Not Item) to load a webpage
thanks again for the help, and i hope its not to confusing
Edited by: 2point2ek on May 25, 2009 9:51 PM

It's better to think in terms of transferring data between object, rather than between classes.
What you need is for the tab pane objects to have a reference to some common object to which the data is to be sent. This common object might be the total pane. It's generally better design to keep the data in separate objects from the presentation (in this case the totals pane), but at this stage that's probably just going to confuse you.
The simplest way to get this reference in is to the pane objects is as a constructor argument, which the constructor of your pane objects saves in a field. As you create each pane you pass it a reference and it stores that reference for when it needs to save data.
Then, when you click detect the action by which the user tells the program to store the data he's entered the pane class should call a method on the central data object, passing all the data from that pane. If there's a lot of it, wrap it up in an object (typically called a "data transfer object").
The central data object would be responsible for dealing with this data, amending totals etc.. It might delegate responsibility for updating the display to a separate total pane object.

A different way to deal with "unknown" user after upgrade from Tiger.

It's a known issue that doing upgrade and install or archive and install from Tiger to Leopard, produces a lot of folders with "unknown" group in their "get info" panel. This has to do with a different group structure in Tiger and Leopard.
In Tiger, every user has their own private group with the same name as the username. That group is set to be user's primary group.
In leopard, every new user with an account is a member of the group staff (gid=20) which is not present in Tiger. Leopard doesn't fully understand Tiger's private group structure, hence the "unknown" group. This causes various problems such as Finder crashes when trying to change the permissions and ownership in the get info window.
Apple's proposed way of dealing with this is described [here|http://docs.info.apple.com/article.html?artnum=307128].
However, this method doesn't change the existing group structure and doesn't resolve all the problems.
I'd like to suggest a different way of dealing with it.
1. create a new admin user (if you don't have one already), log out of your primary account and log into the new one.
2. enter the following in terminal:
*sudo dscl . delete /users/"username"*
where username is the short name of the user on the main account (not the one you are currently logged into).
This will delete that user.
3. Log out/in.
4. go to system preferences->accounts and create a new user with the name and short name exactly as the one you've deleted in step 2.
You'll be get a popup saying that a home directory by this name already exists and asking if you want to use it. Say "Yes".
That's it. Your main user will be recreated using the native group structure of Leopard with gid=20(staff). Permissions on your home directory will be reset with correct group and ownership.
I tested the process on my powerbook after an upgrade and install from Tiger to leopard and it worked without a hitch.
I like this method better than Apple's because it completely gets rid of Tiger's group structure which was creating all the confusion. The only downside as far as I can see is that you might have to manually change the group ownership on some files belonging to the main user that sit outside your home directory.
I would appreciate any comments on this.

hmm, I confess, I did this before installing 10.5.2 so i can't say for sure. However, I've dealt with a few people (see e.g. this [thread|http://discussions.apple.com/thread.jspa?messageID=7012957]) who are running 10.5.2 and still have this issue. I don't know what if anything 10.5.2 did about this but I'm quite sure that it didn't change the group structure inherited from Tiger.
Message was edited by: V.K.

Problem in importing two different classes with same name...

I have to import two different classes in my program with the same name....
import org.apache.lucene.document.Document;
import org.w3c.dom.Document;
//    I AM USING THE DOCUMENT FROM W3C PACKAGE HERE....
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
                 DocumentBuilder builder = factory.newDocumentBuilder();
                 InputSource is = new InputSource( new StringReader( tempString ) );
                 d = builder.parse( is );
                 NodeList images = d.getElementsByTagName("img");
                 int length = images.getLength();
                 for(int i = 0;i<length;i++)
                     Node image = images.item(i);
                     String tempAltText = image.getAttributes().getNamedItem("alt").getNodeValue();
                     altText = altText.concat(" ").concat(tempAltText);
                 }and the error i am getting is
[javac] C:\Documents and Settings\sumit-i\WolframWorkspaces\Base\WolframNutch\src\java\com\wolfram\nutch\indexer\InfoCenterFilter.java:20: org.apache.lucene.document.Document is already defined in a single-type import
    [javac] import org.w3c.dom.Document;
    [javac] ^
    [javac] C:\Documents and Settings\sumit-i\WolframWorkspaces\Base\WolframNutch\src\java\com\wolfram\nutch\indexer\InfoCenterFilter.java:132: incompatible types
    [javac] found   : org.w3c.dom.Document
    [javac] required: org.apache.lucene.document.Document
    [javac] d = builder.parse( is );
    [javac] ^
    [javac] C:\Documents and Settings\sumit-i\WolframWorkspaces\Base\WolframNutch\src\java\com\wolfram\nutch\indexer\InfoCenterFilter.java:133: cannot find symbol
    [javac] symbol : method getElementsByTagName(java.lang.String)
    [javac] location: class org.apache.lucene.document.Document
    [javac] NodeList images = d.getElementsByTagName("img");
    [javac] ^
    [javac] Note: Some input files use unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.
    [javac] 3 errorsany idea ..how to resolve it
Edited by: ping.sumit on Jul 16, 2008 3:39 PM
Edited by: ping.sumit on Jul 16, 2008 3:40 PM

now i changed the code to
import org.apache.lucene.document.Document;
import org.w3c.dom.Document;
org.w3c.dom.Document d = null;
try{
     System.out.println("in author");
               URL url = new java.net.URL(urlString);
               java.net.URLConnection conn = url.openConnection();
               BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
               while ((in.readLine()) != null)
                    //tempString = tempString.concat(in.readLine());
                    String temp = in.readLine();
                    tempString = tempString + " " + temp;
               System.out.println("the string in author" + tempString);
                in.close();
                DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
                 DocumentBuilder builder = factory.newDocumentBuilder();
                 InputSource is = new InputSource( new StringReader( tempString ) );
                 d = builder.parse( is );
                 NodeList images = d.getElementsByTagName("img");and their is only one error i am getting ...and that is
[javac] C:\Documents and Settings\sumit-i\WolframWorkspaces\Base\WolframNutch\src\java\com\wolfram\nutch\indexer\InfoCenterFilter.java:20: org.apache.lucene.document.Document is already defined in a single-type import
    [javac] import org.w3c.dom.Document;
    [javac] ^
    [javac] Note: Some input files use unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.
    [javac] 1 error

How to deal with conflict and potential conflict classes?

Some classes are marked as conflict and potential conflict classes in the Classloader Analysis Tool.
How to deal with them?
How to use suggested solutions?

Not double load them.
Conflicting classes can lead to weird exceptions. One obvious example would be if you package
an older servlet.jar version into your application and use the weblogic classloading features, such
as prefer-web-inf-classes, to tell weblogic to use this class instead of the one provided in the
system classpath. This one example which leads to weird exceptions, such as connot process jsp tag...
If you really need a the version of the jar for your application, you have to test it through and through
so that you know you do not run into weird production errors.

Dealing with different classes.

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