面向对象编程中的公共，私有和受保护的是什么？ [英] What are public, private and protected in object oriented programming?

问题描述

面向对象编程中的公开，私有和受保护的是什么？

What are public, private and protected in object oriented programming?

推荐答案

>并帮助我们实施封装（或信息隐藏）。它们告诉编译器哪些其他类应该访问被定义的字段或方法。

They are access modifiers and help us implement Encapsulation (or information hiding). They tell the compiler which other classes should have access to the field or method being defined.

private - 只有当前类才能访问该字段或方法。

private - Only the current class will have access to the field or method.

protected - 只有当前类和子类）

protected - Only the current class and subclasses (and sometimes also same-package classes) of this class will have access to the field or method.

public - 任何类都可以引用字段或调用方法。

public - Any class can refer to the field or call the method.

这假设这些关键字用作类定义中字段或方法声明的一部分。

This assumes these keywords are used as part of a field or method declaration within a class definition.

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