FULL PRODUCT VERSION :
java version "1.5.0_02"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_02-b09)
Java HotSpot(TM) Client VM (build 1.5.0_02-b09, mixed mode)

It also fails with all the 1.3 J2SE(but Pt_BR is not officially fully suported under 1.3)

ADDITIONAL OS VERSION INFORMATION :
Windows 2000


EXTRA RELEVANT SYSTEM CONFIGURATION :
Brazil Language set in the O.S.

A DESCRIPTION OF THE PROBLEM :
In an enviroment where system locale is pt_BR JOptionPane.showConfirmDialog(...) using YES_NO_OPTION shows optionPane with buttons in English.

pt_BR is a fully supported locale un J2SE 1.4.2(http://java.sun.com/j2se/1.4.2/docs/guide/intl/locale.doc.html) so it should show the buttons text in portuguese.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
- In a windows box:

- Change your system language to protuguese Brazil:Start->Configuration->ControlPanel->LocalConfiguration(or RegionConfiguration)->In the general tab, select Portuguese(Brazil)

- Show a JOptionPane with YES_NO_OPTION(example code attached)

- Read the buttons text, it is in English instead or Protuguese


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
pt_BR is a fully supported locale un J2SE 1.4.2(http://java.sun.com/j2se/1.4.2/docs/guide/intl/locale.doc.html) so it should show the buttons text in portuguese.
ACTUAL -
JOptionPane buttons text in english instead portuguese

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.swing.*;

public class JOptionPanei18nBugBrazil{

public static void main(String args[]){

    JFrame frame=new JFrame();
    
    frame.show();
    
    JOptionPane.showConfirmDialog(frame,"pt_Br should work?","i18n issue", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE);

    }

}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
For a new development you could use showOptionDialog with 2 buttons setting the appropiate text in the buttons.
If you can't touch the code, no configuration workarround seems posible.
###@###.### 2005-04-20 21:44:04 GMT