摘要:
day18 18.01 集合框架(Map集合概述和特点) 1.Map接口概述 (1) 将键映射到值的对象 (2) 一个映射不能包含重复的键 (3) 每个键最多只能映射到一个值 2.Map接口和Collection接口的不同 (1) Map是双列的,Collection是单列的 (2) Map的键唯一 阅读全文
摘要:
听力1 Listen to someone who runs a web-business giving a presentation to a group of marketing managers on how to successfully advertise on the Internet. 阅读全文