了解Java中集合框架的Collection接口功能与应用。 1、 Collection接口是集合体系的根接口,定义了集合对象常用的基本操作方法。该接口在Java类库中有多种具体实现,旨在为不同类型的集合提供统一的操作规范,最大限度地实现集合操作的一致性与通用性,便于程序 ...
Data collection is the process of gathering and measuring information used for research. Collecting data is one of the most important steps in the research process, and is part of all disciplines ...