Returns a reverse order NavigableSet view of the keys contained in this map.

  Returns a reverse order NavigableSet view of the keys contained in this map. The set's iterator returns the keys in descending order. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. The set supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations.

The view's iterator is a "weakly consistent" iterator that will never throw ConcurrentModificationException, and guarantees to traverse elements as they existed upon construction of the iterator, and may (but is not guaranteed to) reflect any modifications subsequent to construction.
Returns: a reverse order navigable set view of the keys in this map

  Returns a reverse order view of the mappings contained in this map.

  Returns a reverse order view of the mappings contained in this map. The descending map is backed by this map, so changes to the map are reflected in the descending map, and vice-versa.

The returned map has an ordering equivalent to Collections.reverseOrder(comparator()). The expression m.descendingMap().descendingMap() returns a view of m essentially equivalent to m.
Returns: a reverse order view of this map

 

 
Throws:
- ClassCastException - {@inheritDoc}
- NullPointerException - {@inheritDoc}
- IllegalArgumentException - {@inheritDoc}

 

 
Throws:
- ClassCastException - {@inheritDoc}
- NullPointerException - {@inheritDoc}
- IllegalArgumentException - {@inheritDoc}

  Returns a NavigableSet view of the keys contained in this map.

  Returns a NavigableSet view of the keys contained in this map. The set's iterator returns the keys in ascending order. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. The set supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations.

The view's iterator is a "weakly consistent" iterator that will never throw ConcurrentModificationException, and guarantees to traverse elements as they existed upon construction of the iterator, and may (but is not guaranteed to) reflect any modifications subsequent to construction.

This method is equivalent to method navigableKeySet.
Returns: a navigable set view of the keys in this map

  Returns a NavigableSet view of the keys contained in this map.

  Returns a NavigableSet view of the keys contained in this map. The set's iterator returns the keys in ascending order. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. The set supports element removal, which removes the corresponding mapping from the map, via the Iterator.remove, Set.remove, removeAll, retainAll, and clear operations. It does not support the add or addAll operations.

The view's iterator is a "weakly consistent" iterator that will never throw ConcurrentModificationException, and guarantees to traverse elements as they existed upon construction of the iterator, and may (but is not guaranteed to) reflect any modifications subsequent to construction.
Returns: a navigable set view of the keys in this map

 

 
Throws:
- ClassCastException - {@inheritDoc}
- NullPointerException - {@inheritDoc}
- IllegalArgumentException - {@inheritDoc}

 

 
Throws:
- ClassCastException - {@inheritDoc}
- NullPointerException - {@inheritDoc}
- IllegalArgumentException - {@inheritDoc}

 

 
Throws:
- ClassCastException - {@inheritDoc}
- NullPointerException - {@inheritDoc}
- IllegalArgumentException - {@inheritDoc}

 

 
Throws:
- ClassCastException - {@inheritDoc}
- NullPointerException - {@inheritDoc}
- IllegalArgumentException - {@inheritDoc}