The collections api - Data Structures and Problem Solving Using Java - page 271

47 /**
48 * Removes all key/value pairs from the map.
49 */
50 void clear( );
51
52 /**
53 * Returns the keys in the map.
54 */
55 Set<KeyType> keySet( );
56
57 /**
58 * Returns the values in the map. There may be duplicates.
59 */
60 Collection<ValueType> values( );
61
62 /**
63 * Return a set of Map.Entry objects corresponding to
64 * the key/value pairs in the map.
65 */
66 Set<Entry<KeyType,ValueType>> entrySet( );
67
68 /**
69 * Interface used to access the key/value pairs in a map.
70 * From a map, use entrySet().iterator to obtain an iterator
71 * over a Set of pairs. The next() method of this iterator
72 * yields objects of type Map.Entry<KeyType,ValueType>.
73 */
74 public interface Entry<KeyType,ValueType> extends java.io.Serializable
75 {
76 /**
77 * Returns this pair's key.
78 */
79 KeyType getKey( );
80
81 /**
82 * Returns this pair's value.
83 */
84 ValueType getValue( );
85
86 /**
87 * Change this pair's value.
88 * @return the old value associated with this pair.
89 */
90 ValueType setValue( ValueType newValue );
91 }
92 }
figure 6.37
A sample Map interface (part 2)