/**
* {@inheritDoc}
*
* @see java.util.NavigableSet#headSet(Object, boolean)
* @since 1.6
*/
@SuppressWarnings("unchecked")
public NavigableSet<E> headSet(E end, boolean endInclusive) {
// Check for errors
Comparator<? super E> c = backingMap.comparator();
if (c == null) {
((net.sourceforge.retroweaver.harmony.runtime.java.lang.Comparable<E>) end).compareTo(end);
} else {
c.compare(end, end);
}
return new TreeSet<E>(backingMap.headMap(end, endInclusive));
}
/**
* @throws ClassCastException {@inheritDoc}
* @throws NullPointerException if {@code toElement} is null and this set uses natural ordering,
* or its comparator does not permit null elements
* @throws IllegalArgumentException {@inheritDoc}
* @since 1.6
*/
public NavigableSet<E> headSet(E toElement, boolean inclusive) {
return new TreeSet<E>(m.headMap(toElement, inclusive));
}