FULL PRODUCT VERSION :
java version "1.6.0"
Java(TM) SE Runtime Environment (build 1.6.0-b105)
Java HotSpot(TM) Server VM (build 1.6.0-b105, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux dgtp60 2.6.18.2-34-default #1 SMP Mon Nov 27 11:46:27 UTC 2006 i686 i686 i386 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
In Java 5, an action-properties could be split to an locale-specific file (e.g. actions_de_DE.properties) and a default file (e.g. actions.properties) to specify menu actions etc. That worked quite well - german menus with german default-locale and english menus with english default-locale.

Now the same code with the given example file names leads to english menu entries with german default locale.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Create two action-property files:
   actions.properties
   actions_de_DE.properties

Create an action using reflection from the property files.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
LANG=de_DE@euro
DefaultLocale=de_DE - Command[Name=Neuer
Fehler|ShortDescription=Erstellt einen neuen Fehler]
LANG=c
DefaultLocale=en_US - Command[Name=New Bug|ShortDescription=Create a new
bug]

ACTUAL -
> LANG=de_DE@euro
> java -jar BugInternational.jar
DefaultLocale=de_DE - Command[Name=New Bug|ShortDescription=Create a new
bug]
> LANG=c
> java -jar BugInternational.jar
DefaultLocale=en_US - Command[Name=New Bug|ShortDescription=Create a new
bug]


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
/**
 * @author David Gunkel
 * Show Internationalization-Bug
 * 
 */
import java.awt.event.ActionEvent;
import java.lang.reflect.Method;
import java.util.Locale;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.UIDefaults;
public class Command extends AbstractAction {
    private static final long serialVersionUID = 1L;
    private final static String actionKeys[] = { Action.NAME, Action.SHORT_DESCRIPTION };
    private final String methodName;
    private final Object target;
    public Command(String methodName, UIDefaults defaults) {
        // assert methodName != null or empty, defaults != null
        super(methodName);
        this.methodName = methodName;
        this.target = this;
        for (String k : actionKeys) {
            String mk = methodName + "." + k;
            putValue(k, defaults.get(mk));
        }
    }
    private Method retrieveMethod() {
        Method m = null;
        Class c = target.getClass();
        try {
            m = c.getMethod(methodName);
        }
        catch (NoSuchMethodException ign) {
            try {
                m = c.getMethod(methodName, ActionEvent.class);
            }
            catch (Exception e) {
                System.err.println(e);
                e.printStackTrace();
                System.exit(-1);
            }
        }
        return m;
    }
    public void newBug() {
        System.out.println(this.toString());
    }
    
    protected void actionFailed(ActionEvent actionEvent, Exception e) {
        System.err.println(actionEvent);
        e.printStackTrace();
    }
    public void actionPerformed(ActionEvent actionEvent) {
        if ((target == null) || (methodName == null)) {
            return;
        }
        Method m = this.retrieveMethod();
        try {
            if (m.getGenericParameterTypes().length == 0) {
                m.invoke(target);
            }
            else {
                m.invoke(target, actionEvent);
            }
        }
        catch (Exception e) {
            actionFailed(actionEvent, e);
        }
    }
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("DefaultLocale=" + Locale.getDefault() + " - ");
        sb.append(getClass().getName());
        sb.append("[");
        String delim = "";
        for (String k : actionKeys) {
            sb.append(delim).append(k).append("=").append(getValue(k));
            delim = "|";
        }
        sb.append("]");
        return sb.toString();
    }
    
    public static void main(String[] args) {
        UIDefaults defaults = new UIDefaults();
        defaults.addResourceBundle("actions");
        Action a = new Command("newBug", defaults);
        a.actionPerformed(null);
    }
    
}

And here the property-files.
actions_de_DE.properties:
newBug.Name=Neuer Fehler
newBug.ShortDescription=Erstellt einen neuen Fehler

actions.properties:
newBug.Name=New Bug
newBug.ShortDescription=Create a new bug



---------- END SOURCE ----------

Release Regression From : 5
The above release value was the last known release where this 
bug was not reproducible. Since then there has been a regression.