java之有序聚合/无序集合
java之有序集合/无序集合
无序集: Set
有序集: List
所以,凡是实现set的AbstractSet, CopyOnWriteArraySet, EnumSet, HashSet, JobStateReasons, LinkedHashSet, TreeSet
都是无序的
凡是实现List的
AbstractList, AbstractSequentialList, ArrayList, AttributeList, CopyOnWriteArrayList, LinkedList, RoleList, RoleUnresolvedList, Stack, Vector
都是有序的
无序集: Set
有序集: List
所以,凡是实现set的AbstractSet, CopyOnWriteArraySet, EnumSet, HashSet, JobStateReasons, LinkedHashSet, TreeSet
都是无序的
凡是实现List的
AbstractList, AbstractSequentialList, ArrayList, AttributeList, CopyOnWriteArrayList, LinkedList, RoleList, RoleUnresolvedList, Stack, Vector
都是有序的