Name: auR10023 Date: 08/15/2001



java.util.HashSet.remove(Object ) doesn`t work with null elements.
This method returns false for null element.

Here is the example:

---------------t.java---------------
import java.util.*;

class t {
    public static void main(String [] args) {
        HashSet hs = new HashSet();
        hs.add(null);
        System.out.println(hs.remove(null));
    }
}
 


#java -version
java -version
java version "1.4.0-beta_refresh"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta_refresh-b75)
Java HotSpot(TM) Client VM (build 1.4.0-beta_refresh-b75, mixed mode)

#java -cp . t
false

#java -version
java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
Java HotSpot(TM) Client VM (build 1.3.0-C, interpreted mode)

#java -cp .t
true

======================================================================