Preferences remove(String key) should throw
NullPointerException - if key is null.

But on Mac OS X (tested with Lion), the expected NPE is not thrown.


import java.util.prefs.*;
import java.util.*;

public class Remove {
    public static void main(String[] args) throws Exception {
       try {
           Nodes userNode = new Nodes();
           Preferences userRoot = Preferences.userRoot();
           Preferences N1 = userRoot.node("N1");
           N1.remove(null);
           System.out.println("Test Fail: expected exception not thrown");
       } catch(NullPointerException npe) {
           System.out.println("Test Pass: Expected NullPointerException thrown = " + npe);
       } catch(Exception e) {
           System.out.println("Test Fail");
           e.printStackTrace();
       }

     }

}