--- jsr166/src/jsr166x/NavigableMap.java 2004/12/26 20:13:15 1.4
+++ jsr166/src/jsr166x/NavigableMap.java 2013/02/15 22:20:46 1.12
@@ -1,7 +1,7 @@
/*
* Written by Doug Lea with assistance from members of JCP JSR-166
* Expert Group and released to the public domain, as explained at
- * http://creativecommons.org/licenses/publicdomain
+ * http://creativecommons.org/publicdomain/zero/1.0/
*/
package jsr166x;
@@ -11,191 +11,191 @@ import java.util.*;
/**
* A {@link SortedMap} extended with navigation methods returning the
* closest matches for given search targets. Methods
- * lowerEntry, floorEntry, ceilingEntry,
- * and higherEntry return Map.Entry objects
+ * {@code lowerEntry}, {@code floorEntry}, {@code ceilingEntry},
+ * and {@code higherEntry} return {@code Map.Entry} objects
* associated with keys respectively less than, less than or equal,
* greater than or equal, and greater than a given key, returning
- * null if there is no such key. Similarly, methods
- * lowerKey, floorKey, ceilingKey, and
- * higherKey return only the associated keys. All of these
+ * {@code null} if there is no such key. Similarly, methods
+ * {@code lowerKey}, {@code floorKey}, {@code ceilingKey}, and
+ * {@code higherKey} return only the associated keys. All of these
* methods are designed for locating, not traversing entries.
*
- *
A NavigableMap may be viewed and traversed in either
- * ascending or descending key order. The Map methods
- * keySet and entrySet return ascending views, and
- * the additional methods descendingKeySet and
- * descendingEntrySet return descending views. The
+ *
A {@code NavigableMap} may be viewed and traversed in either
+ * ascending or descending key order. The {@code Map} methods
+ * {@code keySet} and {@code entrySet} return ascending views, and
+ * the additional methods {@code descendingKeySet} and
+ * {@code descendingEntrySet} return descending views. The
* performance of ascending traversals is likely to be faster than
* descending traversals. Notice that it is possible to perform
- * subrannge traversals in either direction using SubMap.
- *
- *
This interface additionally defines methods firstEntry,
- * pollFirstEntry, lastEntry, and
- * pollLastEntry that return and/or remove the least and
- * greatest mappings, if any exist, else returning null.
+ * subrannge traversals in either direction using {@code SubMap}.
*
- *
Implementations of entry-returning methods are expected to
- * return Map.Entry pairs representing snapshots of mappings
+ *
This interface additionally defines methods {@code firstEntry},
+ * {@code pollFirstEntry}, {@code lastEntry}, and
+ * {@code pollLastEntry} that return and/or remove the least and
+ * greatest mappings, if any exist, else returning {@code null}.
+ *
+ *
Implementations of entry-returning methods are expected to
+ * return {@code Map.Entry} pairs representing snapshots of mappings
* at the time they were produced, and thus generally do not
- * support the optional Entry.setValue method. Note however
+ * support the optional {@code Entry.setValue} method. Note however
* that it is possible to change mappings in the associated map using
- * method put.
+ * method {@code put}.
*
* @author Doug Lea
* @param the type of keys maintained by this map
- * @param the type of mapped values
+ * @param the type of mapped values
*/
public interface NavigableMap extends SortedMap {
/**
* 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 entry.
- *
- * @param key the key.
- * @return an Entry associated with ceiling of given key, or null
- * if there is no such Entry.
+ * greater than or equal to the given key, or {@code null} if there is
+ * no such entry.
+ *
+ * @param key the key
+ * @return an Entry associated with ceiling of given key, or {@code null}
+ * if there is no such Entry
* @throws ClassCastException if key cannot be compared with the keys
- * currently in the map.
- * @throws NullPointerException if key is null and this map
- * does not support null keys.
+ * currently in the map
+ * @throws NullPointerException if key is {@code null} and this map
+ * does not support {@code null} keys
*/
public Map.Entry ceilingEntry(K key);
/**
* Returns least key greater than or equal to the given key, or
- * null if there is no such key.
- *
- * @param key the key.
- * @return the ceiling key, or null
- * if there is no such key.
+ * {@code null} if there is no such key.
+ *
+ * @param key the key
+ * @return the ceiling key, or {@code null}
+ * if there is no such key
* @throws ClassCastException if key cannot be compared with the keys
- * currently in the map.
- * @throws NullPointerException if key is null and this map
- * does not support null keys.
+ * currently in the map
+ * @throws NullPointerException if key is {@code null} and this map
+ * does not support {@code null} keys
*/
public K ceilingKey(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 entry.
- *
- * @param key the key.
+ * key strictly less than the given key, or {@code null} if there is no
+ * such entry.
+ *
+ * @param key the key
* @return an Entry with greatest key less than the given
- * key, or null if there is no such Entry.
+ * key, or {@code null} if there is no such Entry
* @throws ClassCastException if key cannot be compared with the keys
- * currently in the map.
- * @throws NullPointerException if key is null and this map
- * does not support null keys.
+ * currently in the map
+ * @throws NullPointerException if key is {@code null} and this map
+ * does not support {@code null} keys
*/
public Map.Entry lowerEntry(K key);
/**
* Returns the greatest key strictly less than the given key, or
- * null if there is no such key.
- *
- * @param key the key.
+ * {@code null} if there is no such key.
+ *
+ * @param key the key
* @return the greatest key less than the given
- * key, or null if there is no such key.
+ * key, or {@code null} if there is no such key
* @throws ClassCastException if key cannot be compared with the keys
- * currently in the map.
- * @throws NullPointerException if key is null and this map
- * does not support null keys.
+ * currently in the map
+ * @throws NullPointerException if key is {@code null} and this map
+ * does not support {@code null} keys
*/
public K lowerKey(K key);
/**
* Returns a key-value mapping associated with the greatest key
- * less than or equal to the given key, or null if there
+ * less than or equal to the given key, or {@code null} if there
* is no such entry.
- *
- * @param key the key.
- * @return an Entry associated with floor of given key, or null
- * if there is no such Entry.
+ *
+ * @param key the key
+ * @return an Entry associated with floor of given key, or {@code null}
+ * if there is no such Entry
* @throws ClassCastException if key cannot be compared with the keys
- * currently in the map.
- * @throws NullPointerException if key is null and this map
- * does not support null keys.
+ * currently in the map
+ * @throws NullPointerException if key is {@code null} and this map
+ * does not support {@code null} keys
*/
public Map.Entry floorEntry(K key);
/**
* Returns the greatest key
- * less than or equal to the given key, or null if there
+ * less than or equal to the given key, or {@code null} if there
* is no such key.
- *
- * @param key the key.
- * @return the floor of given key, or null if there is no
- * such key.
+ *
+ * @param key the key
+ * @return the floor of given key, or {@code null} if there is no
+ * such key
* @throws ClassCastException if key cannot be compared with the keys
- * currently in the map.
- * @throws NullPointerException if key is null and this map
- * does not support null keys.
+ * currently in the map
+ * @throws NullPointerException if key is {@code null} and this map
+ * does not support {@code null} keys
*/
public K floorKey(K key);
/**
* Returns a key-value mapping associated with the least key
- * strictly greater than the given key, or null if there
+ * strictly greater than the given key, or {@code null} if there
* is no such entry.
- *
- * @param key the key.
+ *
+ * @param key the key
* @return an Entry with least key greater than the given key, or
- * null if there is no such Entry.
+ * {@code null} if there is no such Entry
* @throws ClassCastException if key cannot be compared with the keys
- * currently in the map.
- * @throws NullPointerException if key is null and this map
- * does not support null keys.
+ * currently in the map
+ * @throws NullPointerException if key is {@code null} and this map
+ * does not support {@code null} keys
*/
public Map.Entry higherEntry(K key);
/**
* Returns the least key strictly greater than the given key, or
- * null if there is no such key.
- *
- * @param key the key.
+ * {@code null} if there is no such key.
+ *
+ * @param key the key
* @return the least key greater than the given key, or
- * null if there is no such key.
+ * {@code null} if there is no such key
* @throws ClassCastException if key cannot be compared with the keys
- * currently in the map.
- * @throws NullPointerException if key is null and this map
- * does not support null keys.
+ * currently in the map
+ * @throws NullPointerException if key is {@code null} and this map
+ * does not support {@code null} keys
*/
public K higherKey(K key);
/**
* Returns a key-value mapping associated with the least
- * key in this map, or null if the map is empty.
- *
- * @return an Entry with least key, or null
- * if the map is empty.
+ * key in this map, or {@code null} if the map is empty.
+ *
+ * @return an Entry with least key, or {@code null}
+ * if the map is empty
*/
public Map.Entry firstEntry();
/**
* Returns a key-value mapping associated with the greatest
- * key in this map, or null if the map is empty.
- *
- * @return an Entry with greatest key, or null
- * if the map is empty.
+ * key in this map, or {@code null} if the map is empty.
+ *
+ * @return an Entry with greatest key, or {@code null}
+ * if the map is empty
*/
public Map.Entry lastEntry();
/**
* Removes and returns a key-value mapping associated with
- * the least key in this map, or null if the map is empty.
- *
- * @return the removed first entry of this map, or null
- * if the map is empty.
+ * the least key in this map, or {@code null} if the map is empty.
+ *
+ * @return the removed first entry of this map, or {@code null}
+ * if the map is empty
*/
public Map.Entry pollFirstEntry();
/**
* Removes and returns a key-value mapping associated with
- * the greatest key in this map, or null if the map is empty.
- *
- * @return the removed last entry of this map, or null
- * if the map is empty.
+ * the greatest key in this map, or {@code null} if the map is empty.
+ *
+ * @return the removed last entry of this map, or {@code null}
+ * if the map is empty
*/
public Map.Entry pollLastEntry();
@@ -204,93 +204,93 @@ public interface NavigableMap exten
* descending key 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),
+ * (except through the iterator's own {@code 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
+ * the map, via the {@code Iterator.remove}, {@code Set.remove},
+ * {@code removeAll} {@code retainAll}, and {@code clear}
+ * operations. It does not support the add or {@code addAll}
* operations.
*
- * @return a set view of the keys contained in this map.
+ * @return a set view of the keys contained in this map
*/
Set descendingKeySet();
/**
* Returns a set view of the mappings contained in this map, in
* descending key order. Each element in the returned set is a
- * Map.Entry. The set is backed by the map, so changes to
+ * {@code Map.Entry}. 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,
- * or through the setValue operation on a map entry
+ * (except through the iterator's own {@code remove} operation,
+ * or through the {@code setValue} operation on a map entry
* returned by the iterator) 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.
+ * {@code Iterator.remove}, {@code Set.remove},
+ * {@code removeAll}, {@code retainAll} and {@code clear}
+ * operations. It does not support the {@code add} or
+ * {@code addAll} operations.
*
- * @return a set view of the mappings contained in this map.
+ * @return a set view of the mappings contained in this map
*/
- Set> descendingEntrySet();
+ Set> descendingEntrySet();
/**
* 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 sorted map
+ * {@code fromKey}, inclusive, to {@code toKey}, exclusive. (If
+ * {@code fromKey} and {@code toKey} are equal, the returned sorted map
* is empty.) The returned sorted map is backed by this map, so changes
* in the returned sorted map are reflected in this map, and vice-versa.
-
- * @param fromKey low endpoint (inclusive) of the subMap.
- * @param toKey high endpoint (exclusive) of the subMap.
+ *
+ * @param fromKey low endpoint (inclusive) of the subMap
+ * @param toKey high endpoint (exclusive) of the subMap
*
* @return a view of the portion of this map whose keys range from
- * fromKey, inclusive, to toKey, exclusive.
+ * {@code fromKey}, inclusive, to {@code toKey}, exclusive
*
- * @throws ClassCastException if fromKey and
- * toKey cannot be compared to one another using this
+ * @throws ClassCastException if {@code fromKey} and
+ * {@code toKey} cannot be compared to one another using this
* map's comparator (or, if the map has no comparator, using
- * natural ordering).
- * @throws IllegalArgumentException if fromKey is greater
- * than toKey.
- * @throws NullPointerException if fromKey or
- * toKey is null and this map does not support
- * null keys.
+ * natural ordering)
+ * @throws IllegalArgumentException if {@code fromKey} is greater
+ * than {@code toKey}
+ * @throws NullPointerException if {@code fromKey} or
+ * {@code toKey} is {@code null} and this map does not support
+ * {@code null} keys
*/
public NavigableMap subMap(K fromKey, K toKey);
/**
* Returns a view of the portion of this map whose keys are strictly less
- * than toKey. The returned sorted map is backed by this map, so
+ * than {@code toKey}. The returned sorted map is backed by this map, so
* changes in the returned sorted map are reflected in this map, and
- * vice-versa.
- * @param toKey high endpoint (exclusive) of the headMap.
+ * vice-versa.
+ * @param toKey high endpoint (exclusive) of the headMap
* @return a view of the portion of this map whose keys are strictly
- * less than toKey.
+ * less than {@code toKey}
*
- * @throws ClassCastException if toKey is not compatible
+ * @throws ClassCastException if {@code toKey} is not compatible
* with this map's comparator (or, if the map has no comparator,
- * if toKey does not implement Comparable).
- * @throws NullPointerException if toKey is null
- * and this map does not support null keys.
+ * if {@code toKey} does not implement {@code Comparable})
+ * @throws NullPointerException if {@code toKey} is {@code null}
+ * and this map does not support {@code null} keys
*/
public NavigableMap headMap(K toKey);
/**
* Returns a view of the portion of this map whose keys are
- * greater than or equal to fromKey. The returned sorted
+ * greater than or equal to {@code fromKey}. The returned sorted
* map is backed by this map, so changes in the returned sorted
* map are reflected in this map, and vice-versa.
- * @param fromKey low endpoint (inclusive) of the tailMap.
+ * @param fromKey low endpoint (inclusive) of the tailMap
* @return a view of the portion of this map whose keys are greater
- * than or equal to fromKey.
- * @throws ClassCastException if fromKey is not compatible
+ * than or equal to {@code fromKey}
+ * @throws ClassCastException if {@code fromKey} is not compatible
* with this map's comparator (or, if the map has no comparator,
- * if fromKey does not implement Comparable).
- * @throws NullPointerException if fromKey is null
- * and this map does not support null keys.
+ * if {@code fromKey} does not implement {@code Comparable})
+ * @throws NullPointerException if {@code fromKey} is {@code null}
+ * and this map does not support {@code null} keys
*/
- public NavigableMap tailMap(K fromKey);
+ public NavigableMap tailMap(K fromKey);
}