SetOperations
无序集合,add的顺序不是存储顺序
2.difference(K key, otherK[s])
:差集,返回Set
3.differenceAndStore(K key, otherKey[s], K destKey)
:存储差集,返回Long
4.intersect(K key, otherKey[s]):交集,返回Set
5.intersectAndStore(K key, otherKey[s], K destKey)
:存储交集,返回Long
6.isMember(K key, java.lang.Object o)
:对象是否存在
8.move(K key, V value, K destKey)
:转移一个元素到另一个key(剪切)
10.randomMember(K key)
:随即元素
11.remove(K key, java.lang.Object o)
:移除元素
13.union(K key, otherKey[s]):并集
14.unionAndStore(K key, otherKey[s], K destKey
): 存储并集到destKey