题目详情

( )描述对操作规范的说明,其只说明操作应该做什么,并没有定义操作如何做。

  • A.接口
  • B.多态
  • C.封装
  • D.继承

正确答案及解析

正确答案
A
解析

接口:描述对操作规范的说明,其只说明操作应该做什么,并没有定义操作如何做。可以将接口理解 成为类的一个特例,它规定了实现此接口的类的操作方法,把真正的实现细节交由实现该接口的类去完成。

多态:不同的对象收到同一消息可以进行不同的响应,并且会产生完全不同的结果,这种现象称为多态。

封装:将相关的概念组成一个单元模块,并通过一个名称来引用它。面向对象封装是将数据和基于数据的操作封装成一个整体对象,对数据的访问或修改只能通过对象对外提供的接口进行。

继承:表示类之间的层次关系(父类与子类),这种关系使得某类对象可以继承另外一类对象的特征。

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