map接口嗎 應該用hashmap呀 我這個用map報錯
m
ap不是map不是接口嗎 ?應該用hashmap呀 ?我這個用map報錯
慕絲4937072
2017-02-28
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2017-03-03
public interface
Map
java.util.Map<K,?V> ? ?
Known Indirect Subclasses
AbstractMap<K,?V>,?ArrayMap<K,?V>,?Attributes,?AuthProvider,?ConcurrentHashMap<K,?V>,?ConcurrentMap<K,?V>,ConcurrentNavigableMap<K,?V>,?ConcurrentSkipListMap<K,?V>,?EnumMap<K?extends?Enum<K>,?V>,?HashMap<K,?V>,Hashtable<K,?V>,?IdentityHashMap<K,?V>,?LinkedHashMap<K,?V>,?NavigableMap<K,?V>,?Properties,?Provider,SortedMap<K,?V>,?TreeMap<K,?V>,?WeakHashMap<K,?V>
? ?
2017-03-01
map是一種常用的數據結構，稱為鍵值對。