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ConcurrentNavigableMap


java.util.concurrent

Interface ConcurrentNavigableMap<K,V>

    • Method Detail

      • subMap

        ConcurrentNavigableMap<K,V> subMap(K fromKey,
                                         boolean fromInclusive,
                                         K toKey,
                                         boolean toInclusive)
        Description copied from interface: NavigableMap
        Returns a view of the portion of this map whose keys range from fromKey to toKey. If fromKey and toKey are equal, the returned map is empty unless fromExclusive and toExclusive are both true. The returned map is backed by this map, so changes in the returned map are reflected in this map, and vice-versa. The returned map supports all optional map operations that this map supports.

        The returned map will throw an IllegalArgumentException on an attempt to insert a key outside of its range, or to construct a submap either of whose endpoints lie outside its range.

        Specified by:
        subMap in interface NavigableMap<K,V>
        Parameters:
        fromKey - low endpoint of the keys in the returned map
        fromInclusive - true if the low endpoint is to be included in the returned view
        toKey - high endpoint of the keys in the returned map
        toInclusive - true if the high endpoint is to be included in the returned view
        Returns:
        a view of the portion of this map whose keys range from fromKey to toKey
        Throws:
        ClassCastException - if fromKey and toKey cannot be compared to one another using this map's comparator (or, if the map has no comparator, using natural ordering). Implementations may, but are not required to, throw this exception if fromKey or toKey cannot be compared to keys currently in the map.
        NullPointerException - if fromKey or toKey is null and this map does not permit null keys
        IllegalArgumentException - if fromKey is greater than toKey; or if this map itself has a restricted range, and fromKey or toKey lies outside the bounds of the range
      • headMap

        ConcurrentNavigableMap<K,V> headMap(K toKey,
                                          boolean inclusive)
        Description copied from interface: NavigableMap
        Returns a view of the portion of this map whose keys are less than (or equal to, if inclusive is true) toKey. The returned map is backed by this map, so changes in the returned map are reflected in this map, and vice-versa. The returned map supports all optional map operations that this map supports.

        The returned map will throw an IllegalArgumentException on an attempt to insert a key outside its range.

        Specified by:
        headMap in interface NavigableMap<K,V>
        Parameters:
        toKey - high endpoint of the keys in the returned map
        inclusive - true if the high endpoint is to be included in the returned view
        Returns:
        a view of the portion of this map whose keys are less than (or equal to, if inclusive is true) toKey
        Throws:
        ClassCastException - if toKey is not compatible with this map's comparator (or, if the map has no comparator, if toKey does not implement Comparable). Implementations may, but are not required to, throw this exception if toKey cannot be compared to keys currently in the map.
        NullPointerException - if toKey is null and this map does not permit null keys
        IllegalArgumentException - if this map itself has a restricted range, and toKey lies outside the bounds of the range
      • tailMap

        ConcurrentNavigableMap<K,V> tailMap(K fromKey,
                                          boolean inclusive)
        Description copied from interface: NavigableMap
        Returns a view of the portion of this map whose keys are greater than (or equal to, if inclusive is true) fromKey. The returned map is backed by this map, so changes in the returned map are reflected in this map, and vice-versa. The returned map supports all optional map operations that this map supports.

        The returned map will throw an IllegalArgumentException on an attempt to insert a key outside its range.

        Specified by:
        tailMap in interface NavigableMap<K,V>
        Parameters:
        fromKey - low endpoint of the keys in the returned map
        inclusive - true if the low endpoint is to be included in the returned view
        Returns:
        a view of the portion of this map whose keys are greater than (or equal to, if inclusive is true) fromKey
        Throws:
        ClassCastException - if fromKey is not compatible with this map's comparator (or, if the map has no comparator, if fromKey does not implement Comparable). Implementations may, but are not required to, throw this exception if fromKey cannot be compared to keys currently in the map.
        NullPointerException - if fromKey is null and this map does not permit null keys
        IllegalArgumentException - if this map itself has a restricted range, and fromKey lies outside the bounds of the range
      • subMap

        ConcurrentNavigableMap<K,V> subMap(K fromKey,
                                         K toKey)
        Description copied from interface: NavigableMap
        Returns a sorted map over a range of this sorted map with all keys greater than or equal to the specified startKey and less than the specified endKey. Changes to the returned sorted map are reflected in this sorted map and vice versa.

        Note: The returned map will not allow an insertion of a key outside the specified range.

        Equivalent to subMap(fromKey, true, toKey, false).

        Specified by:
        subMap in interface NavigableMap<K,V>
        Specified by:
        subMap in interface SortedMap<K,V>
        Parameters:
        fromKey - the low boundary of the range (inclusive).
        toKey - the high boundary of the range (exclusive),
        Returns:
        a sorted map with the key from the specified range.
        Throws:
        ClassCastException - if the class of the start or end key is inappropriate for this sorted map.
        NullPointerException - if the start or end key is null and this sorted map does not support null keys.
        IllegalArgumentException - if the start key is greater than the end key, or if this map is itself a sorted map over a range of another sorted map and the specified range is outside of its range.
      • headMap

        ConcurrentNavigableMap<K,V> headMap(K toKey)
        Description copied from interface: NavigableMap
        Returns a sorted map over a range of this sorted map with all keys that are less than the specified endKey. Changes to the returned sorted map are reflected in this sorted map and vice versa.

        Note: The returned map will not allow an insertion of a key outside the specified range.

        Equivalent to headMap(toKey, false).

        Specified by:
        headMap in interface NavigableMap<K,V>
        Specified by:
        headMap in interface SortedMap<K,V>
        Parameters:
        toKey - the high boundary of the range specified.
        Returns:
        a sorted map where the keys are less than endKey.
        Throws:
        ClassCastException - if the class of the end key is inappropriate for this sorted map.
        NullPointerException - if the end key is null and this sorted map does not support null keys.
        IllegalArgumentException - if this map is itself a sorted map over a range of another map and the specified key is outside of its range.
      • tailMap

        ConcurrentNavigableMap<K,V> tailMap(K fromKey)
        Description copied from interface: NavigableMap
        Returns a sorted map over a range of this sorted map with all keys that are greater than or equal to the specified startKey. Changes to the returned sorted map are reflected in this sorted map and vice versa.

        Note: The returned map will not allow an insertion of a key outside the specified range.

        Equivalent to tailMap(fromKey, true).

        Specified by:
        tailMap in interface NavigableMap<K,V>
        Specified by:
        tailMap in interface SortedMap<K,V>
        Parameters:
        fromKey - the low boundary of the range specified.
        Returns:
        a sorted map where the keys are greater or equal to startKey.
        Throws:
        ClassCastException - if the class of the start key is inappropriate for this sorted map.
        NullPointerException - if the start key is null and this sorted map does not support null keys.
        IllegalArgumentException - if this map itself a sorted map over a range of another map and the specified key is outside of its range.
      • descendingMap

        ConcurrentNavigableMap<K,V> descendingMap()
        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.

        Specified by:
        descendingMap in interface NavigableMap<K,V>
        Returns:
        a reverse order view of this map
      • navigableKeySet

        NavigableSet<K> navigableKeySet()
        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.

        Specified by:
        navigableKeySet in interface NavigableMap<K,V>
        Returns:
        a navigable set view of the keys in this map
      • keySet

        NavigableSet<K> keySet()
        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.

        Specified by:
        keySet in interface Map<K,V>
        Returns:
        a navigable set view of the keys in this map
      • descendingKeySet

        NavigableSet<K> descendingKeySet()
        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.

        Specified by:
        descendingKeySet in interface NavigableMap<K,V>
        Returns:
        a reverse order navigable set view of the keys in this map


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