Name: nt126004 Date: 06/04/2002


FULL PRODUCT VERSION :
java version "1.4.0-rc"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-rc-b89)
Java HotSpot(TM) Client VM (build 1.4.0-rc-b89, mixed mode)


FULL OPERATING SYSTEM VERSION :
SunOS d007022.smo.av.com 5.8 Generic_108529-07 i86pc i386 i86pc


A DESCRIPTION OF THE PROBLEM :
Preferences.userNodeForPackage() and
Preferences.systemNodeForPackage() produce corrupt (see
example below) node names under the ".java" tree if
an underscore is included in the package name.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1.try the Preferences example show on this page:

http://www.onjava.com/pub/a/onjava/2002/03/06/topten.html

  It's sufficient to wrap it in a simple "psvm" main() (see source below).

  Give it the package statement:
  package under_score;


2. compile and run it
3. note the name created under ".../.java/.userPrefs/..."





EXPECTED VERSUS ACTUAL BEHAVIOR :
Expected:
 .../.java/.userPrefs/under_score

Actual:
 .../.java/.userPrefs/_!(`!bg"k!'`!cg"f!(:!}w"v!()!~@==

ERROR MESSAGES/STACK TRACES THAT OCCUR :
None.

Note that although the Coding Conventions say use only lower-case letters
package names with "_" are perfectly valid and produce correct output - except
for this Preferences problem.

This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package under_score;

import java.util.prefs.*;

public class X {


        public static void main(String[] args) {
// Get Preferences objects for user and system preferences for the package
// that contains the TextEditor class.
Preferences userprefs = Preferences.userNodeForPackage(TextEditor.class);
Preferences sysprefs = Preferences.systemNodeForPackage(TextEditor.class);

// Look up a user preference value as an integer.
// Note that we always pass a default value
int width = userprefs.getInt("width", 80);
// Look up a user preference using a system preference as the default
String dictionary = userprefs.get("dictionary"
sysprefs.get("dictionary",
"default_dictionary"));
        }


}

---------- END SOURCE ----------
(Review ID: 148127)
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