有关 HashTable, HashMap, Collections.synchronizedMap(Map), ConcurrentHashMap 区别
先占位
参考: What's the difference between ConcurrentHashMap and Collections.synchronizedMap(Map)?
[ConcurrentHashMap vs Synchronized HashMap][2]
先占位
参考: What's the difference between ConcurrentHashMap and Collections.synchronizedMap(Map)?
[ConcurrentHashMap vs Synchronized HashMap][2]