Search for localized ResourceBundle

Question

I have an applet that employs some properties files.
All the classes and all the properties files are bundled into a single jar file.
The jar file is indexed.
Nevertheless, when I call ResouceBundle.getBundle("some.package.foo"), it proceeds to make a number of calls back to the web server, looking for localized resources ...
some/package/foo.class
some/package/foo_en.class
some/package/foo_en.properties
some/package/foo_en_US.class
some/package/foo_en_US.properties
This sure seems like a bug to me ... the fact that I have created a jar index should have prevented this from happening.
Q: Is there anything that I can do to prevent these round-trips back to the web server?
Thanks,
Michael

Answer 1

Given that it is using a class loader that seems
really unlikely.I agree that it seems unlikely. Nevertheless, that is the behavior that I am observing.
I wrote a small test program to demonstrate this. Wrapped it up in a .jar file with an index and a manifest that says that it is sealed.
/var/log/httpd/access_log says:
192.168.0.9 - - [29/Dec/2004:21:48:56 -0500] "GET /ResourceBundleBug/rbb/ResourceBundleBug_en.class HTTP/1.1" 404 320 "-" "Mozilla/4.0 (Windows 98 4.10) Java/1.4.2_06"
192.168.0.9 - - [29/Dec/2004:21:48:56 -0500] "GET /ResourceBundleBug/rbb/ResourceBundleBug_en.properties HTTP/1.1" 404 325 "-" "Mozilla/4.0 (Windows 98 4.10) Java/1.4.2_06"
192.168.0.9 - - [29/Dec/2004:21:48:56 -0500] "GET /ResourceBundleBug/rbb/ResourceBundleBug_en_US.class HTTP/1.1" 404 323 "-" "Mozilla/4.0 (Windows 98 4.10) Java/1.4.2_06"
192.168.0.9 - - [29/Dec/2004:21:48:56 -0500] "GET /ResourceBundleBug/rbb/ResourceBundleBug_en_US.properties HTTP/1.1" 404 328 "-" "Mozilla/4.0 (Windows 98 4.10) Java/1.4.2_06"Notice that file names are en.class, en.properties, enUS.class, enUS.properties
Here is the output from jar tf
[mth@mykiss ResourceBundleBug]$ jar tf ResourceBundleBug.jar
META-INF/INDEX.LIST
META-INF/
META-INF/MANIFEST.MF
ResourceBundleBug.class
rbb/
rbb/ResourceBundleBug.propertiesHere is the source to the program
[mth@mykiss ResourceBundleBug]$ cat ResourceBundleBug.java
import java.applet.*;
import java.awt.*;
import java.util.*;
public class ResourceBundleBug extends Applet {
  ResourceBundle rb;
  public void init() {
    System.out.println("ResourceBundleBug.init()");
    try {
      rb = ResourceBundle.getBundle("rbb.ResourceBundleBug");
    } catch (MissingResourceException e) {
      System.out.println("could not find rbb.ResourceBundleBug:" + e);
  public void paint(Graphics g) {
    g.setColor(Color.yellow);
    g.fillRect(0, 0, 10000, 10000);
    g.setColor(Color.black);
    String message;
    if (rb == null)
      message = "rb == null :-(";
    else {
      try {
        message = rb.getString("message");
      } catch (MissingResourceException e) {
        message = "Missing resource :-(";
    g.drawString(message, 10, 20);
[mth@mykiss ResourceBundleBug]$ cat manifest.txt
Name: rbb/
Sealed: true
[mth@mykiss ResourceBundleBug]$ cat rbb/ResourceBundleBug.properties
message=Howdy!
[mth@mykiss ResourceBundleBug]$