Map接口中Map.Entry<K,V>实现的内部原理是？？

1. Map的源码如下：
   
2. public abstract interface Map<K, V>
   
3. {
   
4.   public abstract int size();
   
5. 
   
6.   public abstract boolean isEmpty();
   
7. 
   
8.   public abstract boolean containsKey(Object paramObject);
   
9. 
   
10.   public abstract boolean containsValue(Object paramObject);
    
11. 
    
12.   public abstract V get(Object paramObject);
    
13. 
    
14.   public abstract V put(K paramK, V paramV);
    
15. 
    
16.   public abstract V remove(Object paramObject);
    
17. 
    
18.   public abstract void putAll(Map<? extends K, ? extends V> paramMap);
    
19. 
    
20.   public abstract void clear();
    
21. 
    
22.   public abstract Set<K> keySet();
    
23. 
    
24.   public abstract Collection<V> values();
    
25. 
    
26.   public abstract Set<Entry<K, V>> entrySet();
    
27. 
    
28.   public abstract boolean equals(Object paramObject);
    
29. 
    
30.   public abstract int hashCode();
    
31. 
    
32.   public static abstract interface Entry<K, V>
    
33.   {
    
34.     public abstract K getKey();
    
35. 
    
36.     public abstract V getValue();
    
37. 
    
38.     public abstract V setValue(V paramV);
    
39. 
    
40.     public abstract boolean equals(Object paramObject);
    
41. 
    
42.     public abstract int hashCode();
    
43.   }
    
44. }

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都开始看Java源码了，牛！