ViewVC Help
View File | Revision Log | Show Annotations | Download File | Root Listing
root/jsr166/jsr166/src/main/java/util/NavigableMap.java
(Generate patch)

Comparing jsr166/src/main/java/util/NavigableMap.java (file contents):
Revision 1.13 by dl, Mon Mar 27 18:23:13 2006 UTC vs.
Revision 1.30 by jsr166, Wed Sep 30 19:14:05 2015 UTC

# Line 1 | Line 1
1   /*
2 < * Written by Doug Lea with assistance from members of JCP JSR-166
3 < * Expert Group and released to the public domain, as explained at
4 < * http://creativecommons.org/licenses/publicdomain
2 > * Written by Doug Lea and Josh Bloch with assistance from members of JCP
3 > * JSR-166 Expert Group and released to the public domain, as explained at
4 > * http://creativecommons.org/publicdomain/zero/1.0/
5   */
6  
7   package java.util;
# Line 9 | Line 9 | package java.util;
9   /**
10   * A {@link SortedMap} extended with navigation methods returning the
11   * closest matches for given search targets. Methods
12 < * <tt>lowerEntry</tt>, <tt>floorEntry</tt>, <tt>ceilingEntry</tt>,
13 < * and <tt>higherEntry</tt> return <tt>Map.Entry</tt> objects
12 > * {@link #lowerEntry}, {@link #floorEntry}, {@link #ceilingEntry},
13 > * and {@link #higherEntry} return {@code Map.Entry} objects
14   * associated with keys respectively less than, less than or equal,
15   * greater than or equal, and greater than a given key, returning
16 < * <tt>null</tt> if there is no such key.  Similarly, methods
17 < * <tt>lowerKey</tt>, <tt>floorKey</tt>, <tt>ceilingKey</tt>, and
18 < * <tt>higherKey</tt> return only the associated keys. All of these
16 > * {@code null} if there is no such key.  Similarly, methods
17 > * {@link #lowerKey}, {@link #floorKey}, {@link #ceilingKey}, and
18 > * {@link #higherKey} return only the associated keys. All of these
19   * methods are designed for locating, not traversing entries.
20   *
21 < * <p>A <tt>NavigableMap</tt> may be viewed and traversed in either
22 < * ascending or descending key order.  The <tt>Map</tt> methods
23 < * <tt>keySet</tt> and <tt>entrySet</tt> return ascending views, and
24 < * the additional methods <tt>descendingKeySet</tt> and
25 < * <tt>descendingEntrySet</tt> return descending views. The
26 < * performance of ascending traversals is likely to be faster than
27 < * descending traversals.  Notice that it is possible to perform
28 < * subrange traversals in either direction using <tt>navigableSubMap</tt>.
29 < * Methods <tt>navigableSubMap</tt>, <tt>navigableHeadMap</tt>, and
30 < * <tt>navigableTailMap</tt> differ from the similarly named
31 < * <tt>SortedMap</tt> methods only in their declared return types.
32 < * Submaps of any <tt>NavigableMap</tt> must implement the
33 < * <tt>NavigableMap</tt> interface.
21 > * <p>A {@code NavigableMap} may be accessed and traversed in either
22 > * ascending or descending key order.  The {@link #descendingMap}
23 > * method returns a view of the map with the senses of all relational
24 > * and directional methods inverted. The performance of ascending
25 > * operations and views is likely to be faster than that of descending
26 > * ones.  Methods
27 > * {@link #subMap(Object, boolean, Object, boolean) subMap(K, boolean, K, boolean)},
28 > * {@link #headMap(Object, boolean) headMap(K, boolean)}, and
29 > * {@link #tailMap(Object, boolean) tailMap(K, boolean)}
30 > * differ from the like-named {@code SortedMap} methods in accepting
31 > * additional arguments describing whether lower and upper bounds are
32 > * inclusive versus exclusive.  Submaps of any {@code NavigableMap}
33 > * must implement the {@code NavigableMap} interface.
34   *
35 < * <p>This interface additionally defines methods <tt>firstEntry</tt>,
36 < * <tt>pollFirstEntry</tt>, <tt>lastEntry</tt>, and
37 < * <tt>pollLastEntry</tt> that return and/or remove the least and
38 < * greatest mappings, if any exist, else returning <tt>null</tt>.
35 > * <p>This interface additionally defines methods {@link #firstEntry},
36 > * {@link #pollFirstEntry}, {@link #lastEntry}, and
37 > * {@link #pollLastEntry} that return and/or remove the least and
38 > * greatest mappings, if any exist, else returning {@code null}.
39   *
40 < * <p> Implementations of entry-returning methods are expected to
41 < * return <tt>Map.Entry</tt> pairs representing snapshots of mappings
40 > * <p>Implementations of entry-returning methods are expected to
41 > * return {@code Map.Entry} pairs representing snapshots of mappings
42   * at the time they were produced, and thus generally do <em>not</em>
43 < * support the optional <tt>Entry.setValue</tt> method. Note however
43 > * support the optional {@code Entry.setValue} method. Note however
44   * that it is possible to change mappings in the associated map using
45 < * method <tt>put</tt>.
45 > * method {@code put}.
46 > *
47 > * <p>Methods
48 > * {@link #subMap(Object, Object) subMap(K, K)},
49 > * {@link #headMap(Object) headMap(K)}, and
50 > * {@link #tailMap(Object) tailMap(K)}
51 > * are specified to return {@code SortedMap} to allow existing
52 > * implementations of {@code SortedMap} to be compatibly retrofitted to
53 > * implement {@code NavigableMap}, but extensions and implementations
54 > * of this interface are encouraged to override these methods to return
55 > * {@code NavigableMap}.  Similarly,
56 > * {@link #keySet()} can be overridden to return {@link NavigableSet}.
57   *
58   * <p>This interface is a member of the
59 < * <a href="{@docRoot}/../guide/collections/index.html">
59 > * <a href="{@docRoot}/../technotes/guides/collections/index.html">
60   * Java Collections Framework</a>.
61   *
62   * @author Doug Lea
63 + * @author Josh Bloch
64   * @param <K> the type of keys maintained by this map
65   * @param <V> the type of mapped values
66   * @since 1.6
# Line 56 | Line 68 | package java.util;
68   public interface NavigableMap<K,V> extends SortedMap<K,V> {
69      /**
70       * Returns a key-value mapping associated with the greatest key
71 <     * strictly less than the given key, or <tt>null</tt> if there is
71 >     * strictly less than the given key, or {@code null} if there is
72       * no such key.
73       *
74       * @param key the key
75 <     * @return an entry with the greatest key less than <tt>key</tt>,
76 <     *         or <tt>null</tt> if there is no such key
75 >     * @return an entry with the greatest key less than {@code key},
76 >     *         or {@code null} if there is no such key
77       * @throws ClassCastException if the specified key cannot be compared
78       *         with the keys currently in the map
79       * @throws NullPointerException if the specified key is null
# Line 71 | Line 83 | public interface NavigableMap<K,V> exten
83  
84      /**
85       * Returns the greatest key strictly less than the given key, or
86 <     * <tt>null</tt> if there is no such key.
86 >     * {@code null} if there is no such key.
87       *
88       * @param key the key
89 <     * @return the greatest key less than <tt>key</tt>,
90 <     *         or <tt>null</tt> if there is no such key
89 >     * @return the greatest key less than {@code key},
90 >     *         or {@code null} if there is no such key
91       * @throws ClassCastException if the specified key cannot be compared
92       *         with the keys currently in the map
93       * @throws NullPointerException if the specified key is null
# Line 85 | Line 97 | public interface NavigableMap<K,V> exten
97  
98      /**
99       * Returns a key-value mapping associated with the greatest key
100 <     * less than or equal to the given key, or <tt>null</tt> if there
100 >     * less than or equal to the given key, or {@code null} if there
101       * is no such key.
102       *
103       * @param key the key
104       * @return an entry with the greatest key less than or equal to
105 <     *         <tt>key</tt>, or <tt>null</tt> if there is no such key
105 >     *         {@code key}, or {@code null} if there is no such key
106       * @throws ClassCastException if the specified key cannot be compared
107       *         with the keys currently in the map
108       * @throws NullPointerException if the specified key is null
# Line 100 | Line 112 | public interface NavigableMap<K,V> exten
112  
113      /**
114       * Returns the greatest key less than or equal to the given key,
115 <     * or <tt>null</tt> if there is no such key.
115 >     * or {@code null} if there is no such key.
116       *
117       * @param key the key
118 <     * @return the greatest key less than or equal to <tt>key</tt>,
119 <     *         or <tt>null</tt> if there is no such key
118 >     * @return the greatest key less than or equal to {@code key},
119 >     *         or {@code null} if there is no such key
120       * @throws ClassCastException if the specified key cannot be compared
121       *         with the keys currently in the map
122       * @throws NullPointerException if the specified key is null
# Line 114 | Line 126 | public interface NavigableMap<K,V> exten
126  
127      /**
128       * Returns a key-value mapping associated with the least key
129 <     * greater than or equal to the given key, or <tt>null</tt> if
129 >     * greater than or equal to the given key, or {@code null} if
130       * there is no such key.
131       *
132       * @param key the key
133       * @return an entry with the least key greater than or equal to
134 <     *         <tt>key</tt>, or <tt>null</tt> if there is no such key
134 >     *         {@code key}, or {@code null} if there is no such key
135       * @throws ClassCastException if the specified key cannot be compared
136       *         with the keys currently in the map
137       * @throws NullPointerException if the specified key is null
# Line 129 | Line 141 | public interface NavigableMap<K,V> exten
141  
142      /**
143       * Returns the least key greater than or equal to the given key,
144 <     * or <tt>null</tt> if there is no such key.
144 >     * or {@code null} if there is no such key.
145       *
146       * @param key the key
147 <     * @return the least key greater than or equal to <tt>key</tt>,
148 <     *         or <tt>null</tt> if there is no such key
147 >     * @return the least key greater than or equal to {@code key},
148 >     *         or {@code null} if there is no such key
149       * @throws ClassCastException if the specified key cannot be compared
150       *         with the keys currently in the map
151       * @throws NullPointerException if the specified key is null
# Line 143 | Line 155 | public interface NavigableMap<K,V> exten
155  
156      /**
157       * Returns a key-value mapping associated with the least key
158 <     * strictly greater than the given key, or <tt>null</tt> if there
158 >     * strictly greater than the given key, or {@code null} if there
159       * is no such key.
160       *
161       * @param key the key
162 <     * @return an entry with the least key greater than <tt>key</tt>,
163 <     *         or <tt>null</tt> if there is no such key
162 >     * @return an entry with the least key greater than {@code key},
163 >     *         or {@code null} if there is no such key
164       * @throws ClassCastException if the specified key cannot be compared
165       *         with the keys currently in the map
166       * @throws NullPointerException if the specified key is null
# Line 158 | Line 170 | public interface NavigableMap<K,V> exten
170  
171      /**
172       * Returns the least key strictly greater than the given key, or
173 <     * <tt>null</tt> if there is no such key.
173 >     * {@code null} if there is no such key.
174       *
175       * @param key the key
176 <     * @return the least key greater than <tt>key</tt>,
177 <     *         or <tt>null</tt> if there is no such key
176 >     * @return the least key greater than {@code key},
177 >     *         or {@code null} if there is no such key
178       * @throws ClassCastException if the specified key cannot be compared
179       *         with the keys currently in the map
180       * @throws NullPointerException if the specified key is null
# Line 172 | Line 184 | public interface NavigableMap<K,V> exten
184  
185      /**
186       * Returns a key-value mapping associated with the least
187 <     * key in this map, or <tt>null</tt> if the map is empty.
187 >     * key in this map, or {@code null} if the map is empty.
188       *
189       * @return an entry with the least key,
190 <     *         or <tt>null</tt> if this map is empty
190 >     *         or {@code null} if this map is empty
191       */
192      Map.Entry<K,V> firstEntry();
193  
194      /**
195       * Returns a key-value mapping associated with the greatest
196 <     * key in this map, or <tt>null</tt> if the map is empty.
196 >     * key in this map, or {@code null} if the map is empty.
197       *
198       * @return an entry with the greatest key,
199 <     *         or <tt>null</tt> if this map is empty
199 >     *         or {@code null} if this map is empty
200       */
201      Map.Entry<K,V> lastEntry();
202  
203      /**
204       * Removes and returns a key-value mapping associated with
205 <     * the least key in this map, or <tt>null</tt> if the map is empty.
205 >     * the least key in this map, or {@code null} if the map is empty.
206       *
207       * @return the removed first entry of this map,
208 <     *         or <tt>null</tt> if this map is empty
208 >     *         or {@code null} if this map is empty
209       */
210      Map.Entry<K,V> pollFirstEntry();
211  
212      /**
213       * Removes and returns a key-value mapping associated with
214 <     * the greatest key in this map, or <tt>null</tt> if the map is empty.
214 >     * the greatest key in this map, or {@code null} if the map is empty.
215       *
216       * @return the removed last entry of this map,
217 <     *         or <tt>null</tt> if this map is empty
217 >     *         or {@code null} if this map is empty
218       */
219      Map.Entry<K,V> pollLastEntry();
220  
221      /**
222 <     * Returns a {@link Set} view of the keys contained in this map.
222 >     * Returns a reverse order view of the mappings contained in this map.
223 >     * The descending map is backed by this map, so changes to the map are
224 >     * reflected in the descending map, and vice-versa.  If either map is
225 >     * modified while an iteration over a collection view of either map
226 >     * is in progress (except through the iterator's own {@code remove}
227 >     * operation), the results of the iteration are undefined.
228 >     *
229 >     * <p>The returned map has an ordering equivalent to
230 >     * {@link Collections#reverseOrder(Comparator) Collections.reverseOrder}{@code (comparator())}.
231 >     * The expression {@code m.descendingMap().descendingMap()} returns a
232 >     * view of {@code m} essentially equivalent to {@code m}.
233 >     *
234 >     * @return a reverse order view of this map
235 >     */
236 >    NavigableMap<K,V> descendingMap();
237 >
238 >    /**
239 >     * Returns a {@link NavigableSet} view of the keys contained in this map.
240 >     * The set's iterator returns the keys in ascending order.
241 >     * The set is backed by the map, so changes to the map are reflected in
242 >     * the set, and vice-versa.  If the map is modified while an iteration
243 >     * over the set is in progress (except through the iterator's own {@code
244 >     * remove} operation), the results of the iteration are undefined.  The
245 >     * set supports element removal, which removes the corresponding mapping
246 >     * from the map, via the {@code Iterator.remove}, {@code Set.remove},
247 >     * {@code removeAll}, {@code retainAll}, and {@code clear} operations.
248 >     * It does not support the {@code add} or {@code addAll} operations.
249 >     *
250 >     * @return a navigable set view of the keys in this map
251 >     */
252 >    NavigableSet<K> navigableKeySet();
253 >
254 >    /**
255 >     * Returns a reverse order {@link NavigableSet} view of the keys contained in this map.
256       * The set's iterator returns the keys in descending order.
257 <     * The set is backed by the map, so changes to the map are
258 <     * reflected in the set, and vice-versa.  If the map is modified
259 <     * while an iteration over the set is in progress (except through
260 <     * the iterator's own <tt>remove</tt> operation), the results of
261 <     * the iteration are undefined.  The set supports element removal,
262 <     * which removes the corresponding mapping from the map, via the
263 <     * <tt>Iterator.remove</tt>, <tt>Set.remove</tt>,
264 <     * <tt>removeAll</tt>, <tt>retainAll</tt>, and <tt>clear</tt>
220 <     * operations.  It does not support the <tt>add</tt> or <tt>addAll</tt>
221 <     * operations.
222 <     *
223 <     * @return a set view of the keys contained in this map, sorted in
224 <     *         descending order
225 <     */
226 <    Set<K> descendingKeySet();
227 <
228 <    /**
229 <     * Returns a {@link Set} view of the mappings contained in this map.
230 <     * The set's iterator returns the entries in descending key order.
231 <     * The set is backed by the map, so changes to the map are
232 <     * reflected in the set, and vice-versa.  If the map is modified
233 <     * while an iteration over the set is in progress (except through
234 <     * the iterator's own <tt>remove</tt> operation, or through the
235 <     * <tt>setValue</tt> operation on a map entry returned by the
236 <     * iterator) the results of the iteration are undefined.  The set
237 <     * supports element removal, which removes the corresponding
238 <     * mapping from the map, via the <tt>Iterator.remove</tt>,
239 <     * <tt>Set.remove</tt>, <tt>removeAll</tt>, <tt>retainAll</tt> and
240 <     * <tt>clear</tt> operations.  It does not support the
241 <     * <tt>add</tt> or <tt>addAll</tt> operations.
257 >     * The set is backed by the map, so changes to the map are reflected in
258 >     * the set, and vice-versa.  If the map is modified while an iteration
259 >     * over the set is in progress (except through the iterator's own {@code
260 >     * remove} operation), the results of the iteration are undefined.  The
261 >     * set supports element removal, which removes the corresponding mapping
262 >     * from the map, via the {@code Iterator.remove}, {@code Set.remove},
263 >     * {@code removeAll}, {@code retainAll}, and {@code clear} operations.
264 >     * It does not support the {@code add} or {@code addAll} operations.
265       *
266 <     * @return a set view of the mappings contained in this map,
244 <     *         sorted in descending key order
266 >     * @return a reverse order navigable set view of the keys in this map
267       */
268 <    Set<Map.Entry<K, V>> descendingEntrySet();
268 >    NavigableSet<K> descendingKeySet();
269  
270      /**
271       * Returns a view of the portion of this map whose keys range from
272 <     * <tt>fromKey</tt>, inclusive, to <tt>toKey</tt>, exclusive.  (If
273 <     * <tt>fromKey</tt> and <tt>toKey</tt> are equal, the returned map
274 <     * is empty.)  The returned map is backed by this map, so changes
275 <     * in the returned map are reflected in this map, and vice-versa.
276 <     * The returned map supports all optional map operations that this
277 <     * map supports.
256 <     *
257 <     * <p>The returned map will throw an <tt>IllegalArgumentException</tt>
258 <     * on an attempt to insert a key outside its range.
272 >     * {@code fromKey} to {@code toKey}.  If {@code fromKey} and
273 >     * {@code toKey} are equal, the returned map is empty unless
274 >     * {@code fromInclusive} and {@code toInclusive} are both true.  The
275 >     * returned map is backed by this map, so changes in the returned map are
276 >     * reflected in this map, and vice-versa.  The returned map supports all
277 >     * optional map operations that this map supports.
278       *
279 <     * @param fromKey low endpoint (inclusive) of the keys in the returned map
280 <     * @param toKey high endpoint (exclusive) of the keys in the returned map
279 >     * <p>The returned map will throw an {@code IllegalArgumentException}
280 >     * on an attempt to insert a key outside of its range, or to construct a
281 >     * submap either of whose endpoints lie outside its range.
282 >     *
283 >     * @param fromKey low endpoint of the keys in the returned map
284 >     * @param fromInclusive {@code true} if the low endpoint
285 >     *        is to be included in the returned view
286 >     * @param toKey high endpoint of the keys in the returned map
287 >     * @param toInclusive {@code true} if the high endpoint
288 >     *        is to be included in the returned view
289       * @return a view of the portion of this map whose keys range from
290 <     *         <tt>fromKey</tt>, inclusive, to <tt>toKey</tt>, exclusive
291 <     * @throws ClassCastException if <tt>fromKey</tt> and <tt>toKey</tt>
290 >     *         {@code fromKey} to {@code toKey}
291 >     * @throws ClassCastException if {@code fromKey} and {@code toKey}
292       *         cannot be compared to one another using this map's comparator
293       *         (or, if the map has no comparator, using natural ordering).
294       *         Implementations may, but are not required to, throw this
295 <     *         exception if <tt>fromKey</tt> or <tt>toKey</tt>
295 >     *         exception if {@code fromKey} or {@code toKey}
296       *         cannot be compared to keys currently in the map.
297 <     * @throws NullPointerException if <tt>fromKey</tt> or <tt>toKey</tt>
297 >     * @throws NullPointerException if {@code fromKey} or {@code toKey}
298       *         is null and this map does not permit null keys
299 <     * @throws IllegalArgumentException if <tt>fromKey</tt> is greater than
300 <     *         <tt>toKey</tt>; or if this map itself has a restricted
301 <     *         range, and <tt>fromKey</tt> or <tt>toKey</tt> lies
299 >     * @throws IllegalArgumentException if {@code fromKey} is greater than
300 >     *         {@code toKey}; or if this map itself has a restricted
301 >     *         range, and {@code fromKey} or {@code toKey} lies
302       *         outside the bounds of the range
303       */
304 <    NavigableMap<K,V> navigableSubMap(K fromKey, K toKey);
304 >    NavigableMap<K,V> subMap(K fromKey, boolean fromInclusive,
305 >                             K toKey,   boolean toInclusive);
306  
307      /**
308 <     * Returns a view of the portion of this map whose keys are
309 <     * strictly less than <tt>toKey</tt>.  The returned map is backed
310 <     * by this map, so changes in the returned map are reflected in
311 <     * this map, and vice-versa.  The returned map supports all
312 <     * optional map operations that this map supports.
308 >     * Returns a view of the portion of this map whose keys are less than (or
309 >     * equal to, if {@code inclusive} is true) {@code toKey}.  The returned
310 >     * map is backed by this map, so changes in the returned map are reflected
311 >     * in this map, and vice-versa.  The returned map supports all optional
312 >     * map operations that this map supports.
313       *
314 <     * <p>The returned map will throw an <tt>IllegalArgumentException</tt>
314 >     * <p>The returned map will throw an {@code IllegalArgumentException}
315       * on an attempt to insert a key outside its range.
316       *
317 <     * @param toKey high endpoint (exclusive) of the keys in the returned map
318 <     * @return a view of the portion of this map whose keys are strictly
319 <     *         less than <tt>toKey</tt>
320 <     * @throws ClassCastException if <tt>toKey</tt> is not compatible
317 >     * @param toKey high endpoint of the keys in the returned map
318 >     * @param inclusive {@code true} if the high endpoint
319 >     *        is to be included in the returned view
320 >     * @return a view of the portion of this map whose keys are less than
321 >     *         (or equal to, if {@code inclusive} is true) {@code toKey}
322 >     * @throws ClassCastException if {@code toKey} is not compatible
323       *         with this map's comparator (or, if the map has no comparator,
324 <     *         if <tt>toKey</tt> does not implement {@link Comparable}).
324 >     *         if {@code toKey} does not implement {@link Comparable}).
325       *         Implementations may, but are not required to, throw this
326 <     *         exception if <tt>toKey</tt> cannot be compared to keys
326 >     *         exception if {@code toKey} cannot be compared to keys
327       *         currently in the map.
328 <     * @throws NullPointerException if <tt>toKey</tt> is null
328 >     * @throws NullPointerException if {@code toKey} is null
329       *         and this map does not permit null keys
330       * @throws IllegalArgumentException if this map itself has a
331 <     *         restricted range, and <tt>toKey</tt> lies outside the
331 >     *         restricted range, and {@code toKey} lies outside the
332       *         bounds of the range
333       */
334 <    NavigableMap<K,V> navigableHeadMap(K toKey);
334 >    NavigableMap<K,V> headMap(K toKey, boolean inclusive);
335  
336      /**
337 <     * Returns a view of the portion of this map whose keys are
338 <     * greater than or equal to <tt>fromKey</tt>.  The returned map is
339 <     * backed by this map, so changes in the returned map are
340 <     * reflected in this map, and vice-versa.  The returned map
341 <     * supports all optional map operations that this map supports.
337 >     * Returns a view of the portion of this map whose keys are greater than (or
338 >     * equal to, if {@code inclusive} is true) {@code fromKey}.  The returned
339 >     * map is backed by this map, so changes in the returned map are reflected
340 >     * in this map, and vice-versa.  The returned map supports all optional
341 >     * map operations that this map supports.
342       *
343 <     * <p>The returned map will throw an <tt>IllegalArgumentException</tt>
343 >     * <p>The returned map will throw an {@code IllegalArgumentException}
344       * on an attempt to insert a key outside its range.
345       *
346 <     * @param fromKey low endpoint (inclusive) of the keys in the returned map
347 <     * @return a view of the portion of this map whose keys are greater
348 <     *         than or equal to <tt>fromKey</tt>
349 <     * @throws ClassCastException if <tt>fromKey</tt> is not compatible
346 >     * @param fromKey low endpoint of the keys in the returned map
347 >     * @param inclusive {@code true} if the low endpoint
348 >     *        is to be included in the returned view
349 >     * @return a view of the portion of this map whose keys are greater than
350 >     *         (or equal to, if {@code inclusive} is true) {@code fromKey}
351 >     * @throws ClassCastException if {@code fromKey} is not compatible
352       *         with this map's comparator (or, if the map has no comparator,
353 <     *         if <tt>fromKey</tt> does not implement {@link Comparable}).
353 >     *         if {@code fromKey} does not implement {@link Comparable}).
354       *         Implementations may, but are not required to, throw this
355 <     *         exception if <tt>fromKey</tt> cannot be compared to keys
355 >     *         exception if {@code fromKey} cannot be compared to keys
356       *         currently in the map.
357 <     * @throws NullPointerException if <tt>fromKey</tt> is null
357 >     * @throws NullPointerException if {@code fromKey} is null
358       *         and this map does not permit null keys
359       * @throws IllegalArgumentException if this map itself has a
360 <     *         restricted range, and <tt>fromKey</tt> lies outside the
360 >     *         restricted range, and {@code fromKey} lies outside the
361       *         bounds of the range
362       */
363 <    NavigableMap<K,V> navigableTailMap(K fromKey);
363 >    NavigableMap<K,V> tailMap(K fromKey, boolean inclusive);
364 >
365 >    /**
366 >     * {@inheritDoc}
367 >     *
368 >     * <p>Equivalent to {@code subMap(fromKey, true, toKey, false)}.
369 >     *
370 >     * @throws ClassCastException       {@inheritDoc}
371 >     * @throws NullPointerException     {@inheritDoc}
372 >     * @throws IllegalArgumentException {@inheritDoc}
373 >     */
374 >    SortedMap<K,V> subMap(K fromKey, K toKey);
375 >
376 >    /**
377 >     * {@inheritDoc}
378 >     *
379 >     * <p>Equivalent to {@code headMap(toKey, false)}.
380 >     *
381 >     * @throws ClassCastException       {@inheritDoc}
382 >     * @throws NullPointerException     {@inheritDoc}
383 >     * @throws IllegalArgumentException {@inheritDoc}
384 >     */
385 >    SortedMap<K,V> headMap(K toKey);
386 >
387 >    /**
388 >     * {@inheritDoc}
389 >     *
390 >     * <p>Equivalent to {@code tailMap(fromKey, true)}.
391 >     *
392 >     * @throws ClassCastException       {@inheritDoc}
393 >     * @throws NullPointerException     {@inheritDoc}
394 >     * @throws IllegalArgumentException {@inheritDoc}
395 >     */
396 >    SortedMap<K,V> tailMap(K fromKey);
397   }

Diff Legend

Removed lines
+ Added lines
< Changed lines
> Changed lines