| 73 |
|
* @param <V> the type of mapped values |
| 74 |
|
*/ |
| 75 |
|
public class ConcurrentHashMap<K, V> extends AbstractMap<K, V> |
| 76 |
< |
implements ConcurrentMap<K, V>, Cloneable, Serializable { |
| 76 |
> |
implements ConcurrentMap<K, V>, Serializable { |
| 77 |
|
private static final long serialVersionUID = 7249069246763182397L; |
| 78 |
|
|
| 79 |
|
/* |
| 987 |
|
segments[i].clear(); |
| 988 |
|
} |
| 989 |
|
|
| 990 |
– |
|
| 991 |
– |
/** |
| 992 |
– |
* Returns a shallow copy of this |
| 993 |
– |
* <tt>ConcurrentHashMap</tt> instance: the keys and |
| 994 |
– |
* values themselves are not cloned. |
| 995 |
– |
* |
| 996 |
– |
* @return a shallow copy of this map. |
| 997 |
– |
*/ |
| 998 |
– |
public Object clone() { |
| 999 |
– |
// We cannot call super.clone, since it would share final |
| 1000 |
– |
// segments array, and there's no way to reassign finals. |
| 1001 |
– |
|
| 1002 |
– |
float lf = segments[0].loadFactor; |
| 1003 |
– |
int segs = segments.length; |
| 1004 |
– |
int cap = (int)(size() / lf); |
| 1005 |
– |
if (cap < segs) cap = segs; |
| 1006 |
– |
ConcurrentHashMap<K,V> t = new ConcurrentHashMap<K,V>(cap, lf, segs); |
| 1007 |
– |
t.putAll(this); |
| 1008 |
– |
return t; |
| 1009 |
– |
} |
| 1010 |
– |
|
| 990 |
|
/** |
| 991 |
|
* Returns a set view of the keys contained in this map. The set is |
| 992 |
|
* backed by the map, so changes to the map are reflected in the set, and |
