Name: auR10023 Date: 07/30/2001



java.util.ListResourceBundle.getKeys() doesn`t work with null keys.
The javadoc for this method says nothing about the difference between
null and non-null keys.

javadoc for ListResourceBundle:
...
getKeys

public Enumeration getKeys()

     Implementation of ResourceBundle.getKeys.

     Specified by:
          getKeys in class ResourceBundle
...

javadoc for ResourceBundle:
...
getKeys

public abstract Enumeration getKeys()

     Returns an enumeration of the keys.
...

But if null keys is used in ListResourceBundle this method returns empty
Enumeration.

Here is the example:

---------------t.java---------------

import java.util.*;

public class t {
    public static void main(String argv[]) {
        String key = null;
        Object[][] contents1 = new Object[][] {{null, null}};
        Object[][] contents2 = new Object[][] {{"k0", "v0"}};
        ListResourceBundle parent =
            new PrimitiveBundle(new Object[][] {{"k", "v"}});


        System.out.println("Printing keys of bundle (It contains null keys)");
        PrimitiveBundle bundle1 = new PrimitiveBundle(contents1, parent);
        Enumeration e1 = bundle1.getKeys();
        while (e1.hasMoreElements()) {
            Object ne = e1.nextElement();
            System.out.println(ne);
        }

        System.out.println("Printing keys of bundle (It contains non null keys)");
        PrimitiveBundle bundle2 = new PrimitiveBundle(contents2, parent);
        Enumeration e2 = bundle2.getKeys();
        while (e2.hasMoreElements()) {
            Object ne = e2.nextElement();
            System.out.println(ne);
        }

        
        
    }
}

class PrimitiveBundle extends ListResourceBundle {
  Object[][] list;
  PrimitiveBundle(Object[][] list) {
    this.list = list;
    setParent(null);
  }
  PrimitiveBundle(Object[][] list, ListResourceBundle parent) {
    this.list = list;
    setParent(parent);
  }
  protected Object[][] getContents() {
    return list;
  }
}

------------------output:-------------
#java -version
java version "1.4.0-beta_refresh"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta_refresh-b69)
Java HotSpot(TM) Client VM (build 1.4.0-beta_refresh-b69, mixed mode)

#java t

Printing keys of bundle (It contains null keys)
Printing keys of bundle (It contains non null keys)
k0
k


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