| 93 |
|
* Acts as |
| 94 |
|
* <pre> |
| 95 |
|
* if ((map.containsKey(key)) { |
| 96 |
< |
* map.put(key, value); |
| 97 |
< |
* return true; |
| 98 |
< |
* } else return false; |
| 96 |
> |
* return map.put(key, value); |
| 97 |
> |
* } else return null; |
| 98 |
|
* </pre> |
| 99 |
|
* except that the action is performed atomically. |
| 100 |
|
* @param key key with which the specified value is associated. |
| 101 |
|
* @param value value to be associated with the specified key. |
| 102 |
< |
* @return true if the value was replaced |
| 102 |
> |
* @return previous value associated with specified key, or <tt>null</tt> |
| 103 |
> |
* if there was no mapping for key. A <tt>null</tt> return can |
| 104 |
> |
* also indicate that the map previously associated <tt>null</tt> |
| 105 |
> |
* with the specified key, if the implementation supports |
| 106 |
> |
* <tt>null</tt> values. |
| 107 |
|
* @throws NullPointerException if this map does not permit <tt>null</tt> |
| 108 |
|
* keys or values, and the specified key or value is |
| 109 |
|
* <tt>null</tt>. |
| 110 |
|
*/ |
| 111 |
< |
boolean replace(K key, V value); |
| 111 |
> |
V replace(K key, V value); |
| 112 |
|
|
| 113 |
|
} |
