57. Collections (tool class for list)

Collections:　　

　　Note: Collection is the root interface of a single-column collection  Collections is a tool class for manipulating collection objects

 

　　1. Sort the list collection:

　　　　sort(list) sort by natural characteristics

　　　　sort(list,comaprator) sort by comparator

　　

　　2. Perform a binary search on the set list:

　　　　int  binarySearch(list,key)

　　　　int  binarySearch(list,key,comaprator)

　　

　　3. Take the maximum and minimum values ​​for the set

　　　　max(Collection)

　　　　max(Collection,comapartor)

 

　　　　min(Collection)

 

　　　　min(Collection,comapartor)