| Interface | Description | 
|---|---|
| EntryWeigher<K,V> | A class that can determine the selector of an entry. | 
| Weigher<V> | A class that can determine the selector of a value. | 
| Class | Description | 
|---|---|
| ConcurrentLinkedHashMap<K,V> | A hash table supporting full concurrency of retrievals, adjustable expected
 concurrency for updates, and a maximum capacity to bound the map by. | 
| ConcurrentLinkedHashMap.Builder<K,V> | A builder that creates  ConcurrentLinkedHashMapinstances. | 
| SafeConcurrentHashMap<K,V> | 安全的ConcurrentHashMap实现 此类用于解决在JDK8中调用 ConcurrentHashMap.computeIfAbsent(Object, Function)可能造成的死循环问题。 | 
| Weighers | A common set of  WeigherandEntryWeigherimplementations. | 
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