JAVA相关基础知识
JAVA相关基础知识1、面向目标的特征有哪些方面笼统:笼统即是疏忽一个主题中与当时方案无关的那些方面,以便更充分地注意与当时方案相关的方面。笼统并不方案理解全面问题,而只是选择其间的一部分,暂时不必部分细节。笼统包括两个方面,一是进程笼统,二是数据笼统。2.承继:承继是一种联结类的层次模型,而且允许和鼓励类的重用,它提供了一种明确表述共性的方法。目标的一个新类可以从现有的类中派生,这个进程称为类承继。新类承继了原始类的特性,新类称为原始类的派生类(子类),而原始类称为新类的基类(父类)。派生类可以从它的基类那里承继方法和实例变量,而且类可以修复或添加新的方法使之更适合特别的需求。JAVA相关基础知识.doc
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(Basic knowledge related to JAVA 1. What are the general aspects of goal oriented features? Generality means neglecting those aspects of a topic that are irrelevant to the current scheme, so as to pay more attention to the aspects related to the current scheme. A general plan does not understand a comprehensive problem, but only selects a part of it, without some details for the time being. Generality includes two aspects, one is the process, the other is the data. 2. Inheritance: Inheritance is a hierarchical model that connects classes, and allows and encourages class reuse. It provides a way to clearly express commonality. A new class of the target can be derived from an existing class. This process is called class inheritance. The new class inherits the characteristics of the original class. The new class is called the derived class (subclass) of the original class, and the original class is called the base class (parent class) of the new class. Derived classes can inherit methods and instance variables from their base classes, and classes can repair or add new methods to make them more suitable for special needs.JAVA related foundation.doc
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