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Préférences
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JavaTM 2 Platform Std. Ed. v1.6.0
java.util
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Nested Class Summary |
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Nested classes/interfaces inherited from interface java.util.Map |
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Map.Entry<K,V> |
Method Summary | |
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Map.Entry<K,V> |
ceilingEntry(K key)
Returns a key-value mapping associated with the least key greater than or equal to the given key, or null if
there is no such key. |
K |
ceilingKey(K key)
Returns the least key greater than or equal to the given key, or null if there is no such key. |
NavigableSet<K> |
descendingKeySet()
Returns a reverse order NavigableSet view of the keys contained in this map. |
NavigableMap<K,V> |
descendingMap()
Returns a reverse order view of the mappings contained in this map. |
Map.Entry<K,V> |
firstEntry()
Returns a key-value mapping associated with the least key in this map, or null if the map is empty. |
Map.Entry<K,V> |
floorEntry(K key)
Returns a key-value mapping associated with the greatest key less than or equal to the given key, or null if there
is no such key. |
K |
floorKey(K key)
Returns the greatest key less than or equal to the given key, or null if there is no such key. |
SortedMap<K,V> |
headMap(K toKey)
Returns a view of the portion of this map whose keys are strictly less than toKey. |
NavigableMap<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 . |
Map.Entry<K,V> |
higherEntry(K key)
Returns a key-value mapping associated with the least key strictly greater than the given key, or null if there
is no such key. |
K |
higherKey(K key)
Returns the least key strictly greater than the given key, or null if there is no such key. |
Map.Entry<K,V> |
lastEntry()
Returns a key-value mapping associated with the greatest key in this map, or null if the map is empty. |
Map.Entry<K,V> |
lowerEntry(K key)
Returns a key-value mapping associated with the greatest key strictly less than the given key, or null if there is
no such key. |
K |
lowerKey(K key)
Returns the greatest key strictly less than the given key, or null if there is no such key. |
NavigableSet<K> |
navigableKeySet()
Returns a NavigableSet view of the keys contained in this map. |
Map.Entry<K,V> |
pollFirstEntry()
Removes and returns a key-value mapping associated with the least key in this map, or null if the map is empty. |
Map.Entry<K,V> |
pollLastEntry()
Removes and returns a key-value mapping associated with the greatest key in this map, or null if the map is empty. |
NavigableMap<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 . |
SortedMap<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. |
SortedMap<K,V> |
tailMap(K fromKey)
Returns a view of the portion of this map whose keys are greater than or equal to fromKey. |
NavigableMap<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.SortedMap |
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comparator, entrySet, firstKey, keySet, lastKey, values |
Methods inherited from interface java.util.Map |
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clear, containsKey, containsValue, equals, get, hashCode, isEmpty, put, putAll, remove, size |
Method Detail |
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Map.Entry<K,V> lowerEntry(K key)
null
if there is
no such key.
key
- the key
key
,
or null
if there is no such key
ClassCastException
- if the specified key cannot be compared
with the keys currently in the map
NullPointerException
- if the specified key is null
and this map does not permit null keysK lowerKey(K key)
null
if there is no such key.
key
- the key
key
,
or null
if there is no such key
ClassCastException
- if the specified key cannot be compared
with the keys currently in the map
NullPointerException
- if the specified key is null
and this map does not permit null keysMap.Entry<K,V> floorEntry(K key)
null
if there
is no such key.
key
- the key
key
, or null
if there is no such key
ClassCastException
- if the specified key cannot be compared
with the keys currently in the map
NullPointerException
- if the specified key is null
and this map does not permit null keysK floorKey(K key)
null
if there is no such key.
key
- the key
key
,
or null
if there is no such key
ClassCastException
- if the specified key cannot be compared
with the keys currently in the map
NullPointerException
- if the specified key is null
and this map does not permit null keysMap.Entry<K,V> ceilingEntry(K key)
null
if
there is no such key.
key
- the key
key
, or null
if there is no such key
ClassCastException
- if the specified key cannot be compared
with the keys currently in the map
NullPointerException
- if the specified key is null
and this map does not permit null keysK ceilingKey(K key)
null
if there is no such key.
key
- the key
key
,
or null
if there is no such key
ClassCastException
- if the specified key cannot be compared
with the keys currently in the map
NullPointerException
- if the specified key is null
and this map does not permit null keysMap.Entry<K,V> higherEntry(K key)
null
if there
is no such key.
key
- the key
key
,
or null
if there is no such key
ClassCastException
- if the specified key cannot be compared
with the keys currently in the map
NullPointerException
- if the specified key is null
and this map does not permit null keysK higherKey(K key)
null
if there is no such key.
key
- the key
key
,
or null
if there is no such key
ClassCastException
- if the specified key cannot be compared
with the keys currently in the map
NullPointerException
- if the specified key is null
and this map does not permit null keysMap.Entry<K,V> firstEntry()
null
if the map is empty.
null
if this map is emptyMap.Entry<K,V> lastEntry()
null
if the map is empty.
null
if this map is emptyMap.Entry<K,V> pollFirstEntry()
null
if the map is empty.
null
if this map is emptyMap.Entry<K,V> pollLastEntry()
null
if the map is empty.
null
if this map is emptyNavigableMap<K,V> descendingMap()
remove
operation), the results of the iteration are undefined.
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
.
NavigableSet<K> navigableKeySet()
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. If the map is modified while an iteration
over the set is in progress (except through the iterator's own remove
operation), the results of the iteration are undefined. 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.
NavigableSet<K> descendingKeySet()
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. If the map is modified while an iteration
over the set is in progress (except through the iterator's own remove
operation), the results of the iteration are undefined. 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.
NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive, K toKey, boolean toInclusive)
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.
fromKey
- low endpoint of the keys in the returned mapfromInclusive
- true
if the low endpoint
is to be included in the returned viewtoKey
- high endpoint of the keys in the returned maptoInclusive
- true
if the high endpoint
is to be included in the returned view
fromKey
to toKey
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 rangeNavigableMap<K,V> headMap(K toKey, boolean inclusive)
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.
toKey
- high endpoint of the keys in the returned mapinclusive
- true
if the high endpoint
is to be included in the returned view
inclusive
is true) toKey
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 rangeNavigableMap<K,V> tailMap(K fromKey, boolean inclusive)
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.
fromKey
- low endpoint of the keys in the returned mapinclusive
- true
if the low endpoint
is to be included in the returned view
inclusive
is true) fromKey
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 rangeSortedMap<K,V> subMap(K fromKey, K toKey)
The returned map will throw an IllegalArgumentException on an attempt to insert a key outside its range.
Equivalent to subMap(fromKey, true, toKey, false)
.
fromKey
- low endpoint (inclusive) of the keys in the returned maptoKey
- high endpoint (exclusive) of the keys in the returned map
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 rangeSortedMap<K,V> headMap(K toKey)
The returned map will throw an IllegalArgumentException on an attempt to insert a key outside its range.
Equivalent to headMap(toKey, false)
.
toKey
- high endpoint (exclusive) of the keys in the returned map
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 rangeSortedMap<K,V> tailMap(K fromKey)
The returned map will throw an IllegalArgumentException on an attempt to insert a key outside its range.
Equivalent to tailMap(fromKey, true)
.
fromKey
- low endpoint (inclusive) of the keys in the returned map
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