CookieStore.add() cannot handle null URI parameter, contrary to the API specification

OPERATING SYSTEM
----------------
All

FULL JDK VERSION
----------------
All Java 6

PROBLEM DESCRIPTION
-------------------
The JavaDoc of the add(URI uri, HttpCookie cookie) method of java.net.CookieStore indicates that null is an acceptable value for the URI parameter:

  "uri - the uri this cookie associated with. if null, this cookie will
   not be associated with an URI"

http://java.sun.com/javase/6/docs/api/java/net/CookieStore.html#add(java.net.URI,%20java.net.HttpCookie

However, calling this method with null URI is causes a NullPointerException:

java.lang.NullPointerException
        at sun.net.www.protocol.http.InMemoryCookieStore.getEffectiveURI(Unknown Source)
        at sun.net.www.protocol.http.InMemoryCookieStore.add(Unknown Source)
        at Main.main(Main.java:44)

REPRODUCTION INSTRUCTIONS
-------------------------
Compile and run the testcase provided.

TESTCASE
--------
import java.net.CookieManager;
import java.net.CookieStore;
import java.net.HttpCookie;

public class CookieTest {
    public static void main(String[] args) {
        //get a cookie store implementation and add a cookie to the store with null URI
        CookieStore cookieStore = (new CookieManager()).getCookieStore();
        cookieStore.add(null, new HttpCookie("MY_COOKIE", "MY_COOKIE_VALUE"));
    }
}