Collections.unmodifiableCollection(Collection source) accepts null argument

Name: krT82822 Date: 11/04/99


Collections.unmodifiableCollection(Collection source) accepts null argument.
If you call size() of the returned collection, a NullPointerException is thrown,
because the unmodifiable collection calls source.size(), and source is null.

I would recommend to change result of Collections.unmodifiableCollection using
Collections.EMPTY_LIST (or, better, something like Collections.EMPTY_COLLECTION)
if a null argument is passed to the method.
(Review ID: 97358)
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