当类被声明为包私有时，我们应该声明一个公共构造函数吗？ [英] Should we declare a public constructor when the class is declared as package private?

问题描述

我认为在这种情况下，没有必要声明一个公共构造函数，因为类是不可访问的包外。但是当类只有包私有构造函数时，是否有一些隐藏的影响？

I think in this case there is no need to declare a public constructor since the class is not accessible outside the package anyway. But is there some hidden impact when the class has only package private constructor?

推荐答案

不，你不必声明公共构造函数;包私有构造函数将一样可用。类以外的包将无法使用构造函数，无论如何，因为他们看不到类。

No, you don't have to declare the public constructor; package private constructors will be just as usable. Classes outside the package wouldn't be able to use the constructor anyway, since they can't see the class.

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