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root/jsr166/jsr166/src/main/java/util/concurrent/ConcurrentMap.java

Comparing jsr166/src/main/java/util/concurrent/ConcurrentMap.java (file contents):
Revision 1.14 by dl, Fri Nov 28 12:37:00 2003 UTC vs.
Revision 1.15 by dl, Wed Dec 3 21:07:44 2003 UTC

#	Line 88 | Line 88 | public interface ConcurrentMap<K, V> ext
88		*/
89		boolean replace(K key, V oldValue, V newValue);
90
91	+	/**
92	+	* Replace entry for key only if currently mapped to some value.
93	+	* Acts as
94	+	* <pre>
95	+	*  if ((map.containsKey(key)) {
96	+	*     map.put(key, value);
97	+	*     return true;
98	+	* } else return false;
99	+	* </pre>
100	+	* except that the action is performed atomically.
101	+	* @param key key with which the specified value is associated.
102	+	* @param value value to be associated with the specified key.
103	+	* @return true if the value was replaced
104	+	* @throws NullPointerException if this map does not permit <tt>null</tt>
105	+	*            keys or values, and the specified key or value is
106	+	*            <tt>null</tt>.
107	+	*/
108	+	boolean replace(K key, V value);
109	+
110		}

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