在 UML 类图中，“ #”符号意味着什么？

我当时正在阅读《果壳中的算法》(O’Reilly) ，在一个类图中偶然发现了这个符号。我的猜测是，这意味着该成员是受保护的，但我想看看是否有人知道它的确切含义。

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'#' indicates the visibility. In this case it refers to a protected operation [ edited out the term 'method' as this is not as generic ].

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最佳答案

It indicates a protected member of a class or other data type.

- Indicates private

+ Indicates public

# Indicates protected

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It implies that it is protected, for a variable it will only be seen in the class and inherited classes.

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'#' stands for visibility "protected" (similar to public,private ) behavior of the property/methods in the class . You can find more of the same at uml_basic_notations

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Add also to :

~ Indicates package-private (or default)