Java compact1, compact2, compact3 java.util.concurrent Interface ConcurrentNavigableMap<K,V>（JDK8）

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Java™ Platform
Standard Ed. 8

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Summary:
Nested |
Field |
Constr |
Method

Detail:
Field |
Constr |
Method

Type Parameters:

K - the type of keys maintained by this map

V - the type of mapped values

All Superinterfaces:

ConcurrentMap<K,V>, Map<K,V>, NavigableMap<K,V>, SortedMap<K,V>

All Known Implementing Classes:

ConcurrentSkipListMap
```
public interface ConcurrentNavigableMap<K,V>
extends ConcurrentMap<K,V>, NavigableMap<K,V>
```
A ConcurrentMap supporting NavigableMap operations, and recursively so for its navigable sub-maps.
This interface is a member of the Java Collections Framework.

Since:

1.6

Nested Class Summary
- Nested classes/interfaces inherited from interface java.util.Map
  Map.Entry<K,V>

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`NavigableSet<K>`	`descendingKeySet()` Returns a reverse order `NavigableSet` view of the keys contained in this map.
`ConcurrentNavigableMap<K,V>`	`descendingMap()` Returns a reverse order view of the mappings contained in this map.
`ConcurrentNavigableMap<K,V>`	`headMap(K toKey)` Returns a view of the portion of this map whose keys are strictly less than `toKey`.
`ConcurrentNavigableMap<K,V>`	`headMap(K toKey, boolean inclusive)` Returns a view of the portion of this map whose keys are less than (or equal to, if `inclusive` is true) `toKey`.
`NavigableSet<K>`	`keySet()` Returns a `NavigableSet` view of the keys contained in this map.
`NavigableSet<K>`	`navigableKeySet()` Returns a `NavigableSet` view of the keys contained in this map.
`ConcurrentNavigableMap<K,V>`	`subMap(K fromKey, boolean fromInclusive, K toKey, boolean toInclusive)` Returns a view of the portion of this map whose keys range from `fromKey` to `toKey`.
`ConcurrentNavigableMap<K,V>`	`subMap(K fromKey, K toKey)` Returns a view of the portion of this map whose keys range from `fromKey`, inclusive, to `toKey`, exclusive.
`ConcurrentNavigableMap<K,V>`	`tailMap(K fromKey)` Returns a view of the portion of this map whose keys are greater than or equal to `fromKey`.
`ConcurrentNavigableMap<K,V>`	`tailMap(K fromKey, boolean inclusive)` Returns a view of the portion of this map whose keys are greater than (or equal to, if `inclusive` is true) `fromKey`.

Methods inherited from interface java.util.concurrent.ConcurrentMap
compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll

Methods inherited from interface java.util.NavigableMap
ceilingEntry, ceilingKey, firstEntry, floorEntry, floorKey, higherEntry, higherKey, lastEntry, lowerEntry, lowerKey, pollFirstEntry, pollLastEntry

Methods inherited from interface java.util.SortedMap
comparator, entrySet, firstKey, lastKey, values

Methods inherited from interface java.util.Map
clear, containsKey, containsValue, equals, get, hashCode, isEmpty, put, putAll, remove, size

- 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 fromInclusive and toInclusive 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 view of the portion of this map whose keys range from fromKey, inclusive, to toKey, exclusive. (If fromKey and toKey are equal, the returned map is empty.) 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.
    
    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 - low endpoint (inclusive) of the keys in the returned map
    
    toKey - high endpoint (exclusive) of the keys in the returned map
    
    Returns:
    
    a view of the portion of this map whose keys range from fromKey, inclusive, to toKey, exclusive
    
    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)
```
    Description copied from interface: NavigableMap
    
    Returns a view of the portion of this map whose keys are strictly less than 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.
    
    Equivalent to headMap(toKey, false).
    
    Specified by:
    
    headMap in interface NavigableMap<K,V>
    
    Specified by:
    
    headMap in interface SortedMap<K,V>
    
    Parameters:
    
    toKey - high endpoint (exclusive) of the keys in the returned map
    
    Returns:
    
    a view of the portion of this map whose keys are strictly less than 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)
```
    Description copied from interface: NavigableMap
    
    Returns a view of the portion of this map whose keys are greater than or equal to 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.
    
    Equivalent to tailMap(fromKey, true).
    
    Specified by:
    
    tailMap in interface NavigableMap<K,V>
    
    Specified by:
    
    tailMap in interface SortedMap<K,V>
    
    Parameters:
    
    fromKey - low endpoint (inclusive) of the keys in the returned map
    
    Returns:
    
    a view of the portion of this map whose keys are greater than or equal to 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
  - 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 iterators and spliterators are weakly consistent.
    
    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 iterators and spliterators are weakly consistent.
    
    This method is equivalent to method navigableKeySet.
    
    Specified by:
    
    keySet in interface Map<K,V>
    
    Specified by:
    
    keySet in interface SortedMap<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 iterators and spliterators are weakly consistent.
    
    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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Java™ Platform
Standard Ed. 8

All Classes

Summary:
Nested |
Field |
Constr |
Method

Detail:
Field |
Constr |
Method

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Java compact1, compact2, compact3 java.util.concurrent Interface ConcurrentNavigableMap<K,V>（JDK8）

Interface ConcurrentNavigableMap<K,V>

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Method Summary

Methods inherited from interface java.util.concurrent.ConcurrentMap

Methods inherited from interface java.util.NavigableMap

Methods inherited from interface java.util.SortedMap

Methods inherited from interface java.util.Map

Method Detail

subMap

headMap

tailMap

subMap

headMap

tailMap

descendingMap

navigableKeySet

keySet

descendingKeySet