public static <E> NavigableSet<E> emptyNavigableSet ()

Returns an empty navigable set (immutable). This set is serializable.

This example illustrates the type-safe way to obtain an empty navigable set:

     NavigableSet<String> s = Collections.emptyNavigableSet();

<E>    type of elements, if there were any, in the set

Returns:  the empty navigable set

Since:  1.8

@implNote Implementations of this method need not create a separate NavigableSet object for each call.