Localization changes in J2SE 5

Hi,
I have come across some changes in the localization support in J2SE 5. JSR 204 and corresponding API changes.
Does this mean that if we use char sequence based APIs then there is no other change required ?
Do all functions( string comparisons etc. ) already have support for multi-lingual facilities ?
Basically the following is already taken care of in J2SE 5 ?
"You should be aware that internationalization and localization issues of full Unicode strings are not addressed with [String] methods. For example, when you're comparing two strings to determine which is 'greater', characters in strings are compared numerically by their Unicode values, not by their localized notion of order."
Thanks
Mohan

I think in addition to what I have written we have to use the unicode format( 'U' followed by a hex digit ) in .properties files. Is this a general practice or only for supplementary characters ?
Thanks,
Mohan

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Arabic localization changes don't change the left to right Alignment

Hi all,
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Hi,
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RTF Printing in J2SE 5

Hi,
We are experiencing problems with printing RTF documents in J2SE 5. Our applications prints as expected on J2SE 1.4 but running the same application on J2SE results in output that is looking akward since character spacing is wrong.
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SAMLE APPLICATION:
import java.awt.*;
import java.awt.event.*;
import java.io.*;
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mpogra, welcome to the forum. Please don't post in threads that are long dead. When you have a question, start your own topic. Feel free to provide a link to an old post that may be relevant to your problem.
I'm locking this thread now.
db

J2EE & J2SE install questions

I downloaded and installed this release on my Windows XP machine. The name of the install-executable is j2eesdk-1_4-dr-windows-eval.exe.
In the download website, it said this includes J2SE 1.4.2_02 also, although after installation, none of the online documentation for J2SE seems to be present, only J2EE-specific ones (includng EJB, security, server, web, etc) are present.
Do I need to install the J2SE SDK separately to get access to the regular J2SE code and documentation? Or, is this all comes with the J2EE SDK?
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So, you have J2EE SDK already installed, and you want to use another J2SE version that you installed separately, right?
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Compilation with packages is different in J2SE 1.4.1 ?

Hi there !
I've just installed J2SE 1.4.1_01 in my Win NT 4.0 computer.
Some of the files that belong to packages compiled just fine with JDK 1.2.2 but don't compile with J2SE 1.4.1_01.
The same is true when I try to compile Java2D in the demo\jfc directory.
In project NumberFormatTest I have the following classes:
=====================================================================
d:\MyPrograms\Java\NumberFormatTest\NumberFormatTestFrame.java
package NumberFormatTest;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import java.text.*;
import java.util.*;
import tools.*;
public class NumberFormatTestFrame extends Frame
implements ActionListener, KeyListener, WindowListener
=====================================================================
d:\MyPrograms\Java\Tools\JCTextField.java
package tools;
import java.awt.*;
public class JCTextField extends TextField
=====================================================================
d:\MyPrograms\Java\Tools\JCDecimalTextField.java
package tools;
import java.text.*;
import java.util.*;
public class JCDecimalTextField extends JCTextField
d:\MyPrograms\Java>javac Tools\JCTextField.java
compiles OK
d:\MyPrograms\Java>javac Tools\JCDecimalTextField.java
does not compile successfully with the error,
Tools\JCDecimalTextField.java:67: cannot resolve symbol
symbol : class JCTextField
location: class tools.JCDecimalTextField
public class JCDecimalTextField extends JCTextField
pointing to the J in JCTextField
d:\MyPrograms\Java>javac NumberFormatTest\NumberFormatTestFrame.java
also doesn't compile with with "cannot resolve symbol" errors, when it tries to use JCDecimalTextField.
It seems to me that classes defined by me to extend another class defined by me (JCDecimalTextField) and inside a package (tools) aren't being found by javac.
However JCTextField is defined by me, extends TextField (from java.awt.*), is inside package tools and compiles OK.
This stuff didn't happen in JDK 1.2.2.
What the hell has changed with J2SE 1.4.1 ???
My PATH has C:\Program Files\jdk\bin (among other directories)
My CLASSPATH is
D:\MyPrograms\Java;C:\Program Files\jdk\lib\tools.jar;C:\Program Files\Java\j2re1.4.1_01\lib\rt.jar;.;
I strongly suspect that something has changed after JDK 1.2.2 in the way packages are handled by javac. I've tried searching in forums and other sun java documentation but couldn't find an answer to my problem.
Can anyone please help me ?
Any hint, suggestion or Internet site with appropriate documentation, would be highly appreciated as a means to end this 2 day nightmare.
Thanks in advance,
MGoncalv

This issue has already been solved.
J2SE 1.4.1 is case sensitive with regard to package directories.
My tools package files must in subdirectory tools (but not Tools).
This problem didn't happened with JDK 1.2.2
For more details please take a look at
Cannot resolve symbol
from Feb 10, 2003 11:46
by MGoncalv

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Do I install the J2EE JDK or the J2SE JDK?
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An error occurred while redeploying application "FormsSiebelIntegration". See base exception for details.
Resolution:
See base exception for details.
Base Exception:
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Java Stored Procedure Problem

Hi all,
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Could someone help me with this? Thanks a lot.
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Thanks.
Ben

"catch is unreachable" compiler error with java try/catch statement

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try {
SendMail(....);
} catch (MessagingException e1) {
logger.fine(e1.toString());
} catch (AddressException e2) {
logger.fine(e2.toString());
public String SendMail(....) throws AddressException,
MessagingException {....

I found the problem:
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If I switch the order of the catch exceptions the compiler error goes away.
thanks

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Perhaps someone wouldn't mind helping with some simple questions....
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JavaServer Faces requires an environment that supports at least Servlet 2.3 and JSP 1.2. It will not run on any server that supports Servlet 2.2 or earlier only. Any J2EE 1.3 or later app server meets these criteria, but it's not required (for JavaServer Faces) that you have a full J2EE server unless you need those facilities (such as EJBs) for your applications.
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Craig MClanahan

Which webstart version is starting my app ?? [confused...]

I'm a bit confused, but maybe someone can help me out.
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-> a webapp on some (web)server (also with mime-type correctly configured). The webapp contains the necessary resources (jars, jnlp file).
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<?xml version="1.0" encoding="utf-8"?>
<jnlp spec="1.0+" codebase="http://server1/someapp" href="someapp.jnlp">
<information>
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<vendor>Sun Microsystems, Inc.</vendor>
<offline-allowed/>
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help.

Yes - in this case you run webstart 1.5.0 with jre 1.4.7
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Whats a String constant pool?

I was reading an article about weak references and came across a peice of code
Map<String,String> map = new WeakHashMap<String, String>();
map.put(new String("Scott"), "McNealey");They also said
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Jubs

No it won't: it will only be removed when the garbage collector rears
its ugly head. Until then the reference will be present in the map.Okay it was unprecise. The item MAY be removed immediately after it
has been inserted because the key object is only referenced from the
Map itself.Yes, that is true, but mind though: any object that still has a strong
reference to it will not be removed from that map. I use such weak maps
for localization reasons a lot. When a localization changes (while the
application is running), a whole lot of visual components must have
their text part changed. They are all stored in such a weak reference map.
Of course quite some visual components can be garbage collected
at some time (think of labels etc. in JDialogs after the dialog has been
disposed).
These maps are ideal for those purposes.
kind regards,
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Draw a path on a image?

Hi!
I have a image that is like a "map" of something and i need to draw the localization of a car in that map. That localization changes in time. I want to display that in a swing aplication...
right now i have the image in a JLabel with ImageIcon. to draw the 'car' (when a button is pressed) i do a getGraphics and I draw a fillRect... Everything ok until I try to remove the old localizationn of the car and i draw the new one...
I don't know how to clear the old localization. I can't fill it with white, that way i can't see the map image below that... I have to clear it with a transparent Color or something like that, or simply remove that graphics..
please note that when i click that button i have a for loop, 50 iterations, to show the car "moving" around the map...
any ideia on how I should do this, or HOW can I do this???
TIA

hi,
i never tried jlayerede pane but i don't know if i will solve the problem with that because in the top layer (the car layer) i will do a fillrect to represent the car... wait some seconds, then clearRect and then draw the new position of the car... I guess the trail of the car will appear in white, no?
i wil try anyway :)

Why we use interfaces ?

hi all!
i m confused that what is the advantage of using interfaces for classes if it is for security,data hiding pupose then we can use private modifiers,then y is this think built in java and which r the cases in which we must use interfaces and y?
plz give me any simple example to understand ur point
thanx in advance.
sajjad ahmad

Hmm... First, I'm sorry about my English... but i will try.
In C++ we can use multi-inheritance that let the developer "extends" one or more classes.
eg.
class Hello extends A,B,C,D
This case can be happened in C++.
But If both class A and B have a method call "void sayMyName()"
How can we refer which method was called when we call "Hello.sayMyName()"
A.sayMyName() or B.sayMyName()
So java don't allow this thing happen.
Java allow developers to extend "only one class"
but to enable multi-inheritance ability Java allow developer to implement more than one class.
That is "interface" which was implemented.
Now lets talk about it's benefits.
Interface is not for security or data hiding purpose.
But interface is used for "make a template".
When I created one class called Hello.
But I have created another class too.
Now I want to make sure that my classed have a method "void say()"
What can I do ?
1. Make some class that have a method "void say()" and let my classes extend it.
2. Make an interface and implement it.
Choise number one is quite good ... but !!!
If I have to extend some another class that is more important such as "Applet"
Now I can't extend another class.
I need only method "void say()". But I don't care what it does.
So I make an interface that force the implementing class to create a method "void say()"
and I implement it.
Question: Why I have to implement this interface ? If I only define a method "void say()"
The problems is gone ....
Answer: That may be true if I want them to have a method. But how can I refer to them.
Lets see this code.
class A extends Applet {
void say() {System.out.println("My name is A");}
... go on ...
class B extends Applet {
void say() {System.out.println("My name is B")}
... go on ...
class GO {
public void letMeSay(............. o) {
o.say();
What can I fill in the argument of method "letMeSay()"?
Object ? Object doesn't have a method "void say()"
Applet ? With the same reason.
Now lets see another code.
interface Sayable {
abstract void say();
class A extends Applet implements Sayable {
void say() {System.out.println("My name is A");}
... go on ...
class B extends Applet implements Sayable {
void say() {System.out.println("My name is B")}
... go on ...
public void letMeSay(Sayable o) {
o.say();
It's ok right ... I can refer to interface "Sayable" that can "say"
Next benefit of interface ... "define Constants field"
We can define constants in an interface and implements it to everywhere we want to use those constants. When we change a value in this interface ... Constants in another place will be changed too .... that is very useful ....(But this may have change in J2SE 1.5 ... see more info)
"I HOPE THIS REPLY MAY GIVE YOU SOME KNOWLEDGE ... GOOD LUCK WITH PROGRAMMING"

What is the Easiest way to sequence records in a Interface?

I very simply want to add a sequence number in the Mapping definition to an interface as I process records and write to a simple file. I want to start at 1 each time and process to X.
I would think their should be a reserved word like (rowcount or counter) but for the life of me I can't find it. I would have thought I could have used Variables, but that does not seem on because there does not seem to a way to update them. Looks like a sequence is the only way to go, but then I have to reset it every time and my initial testing indicated it would not increment. But that is probably operator trouble! I would like to know how the experts would accomplish this simply programming feat. ODI is so powerful, why make such a simple thing so complicated?
Thanks

First off, make them learn GridBagLayout as well as the other layout managers (like BorderLayout). Have them play around with JBuilder's visual editor, making note of what changes visually do to the underlying code, etc. It will serve them well.
I have yet to find an "easier" layout manager that doesn't at some point tie your hands and end up making life more difficult. With GridBagLayout, BorderLayout and use of subcontainers, you can do anything you might need. :-)
I wouldn't say absolute positioning is anti-Java.
It's certainly more work to deal with in most cases.
. You can always get the screen resolution and
adjust your sizes accordingly. It's still 100% pure
Java code. It is anti in that it doesn't follow the general spirit of Java. Yes it will be 100% Java code, but it will be at least 90% crap as well. :-) You then can't easily do localization, changes in the look & feel mess up your app, your components won't resize properly, any change to a label's text causes you to have to tweak everything, etc. Ghastly stuff. It is the lazy way to get the GUI to look like someones mock up, but that is all it's good for.
If you run across a GUI done with absolute positioning, you have my permission to give the responsible developer an atomic wedgie.

Localization changes in J2SE 5

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