如何保护类，以使它们在其包之外不可见 [英] How to protect classes so they are not visible outside their package

问题描述

我想在我的包中有两个受保护的类。也就是说，我不希望我的包外面的文件看到它们是可见的 - 它们将只在包内部使用。

I'd like to be able to have two "protected" classes in my package. That is, I do not want files outside of my package to see them as visible - they will be for internal use within the package only.

我该如何做？

推荐答案

只要省略所有关键字即可。默认浏览权限是打包私有，可在

Just leave out all keywords. The default visibility is package-private, viewable within the package only.

例如：

// class Foo is public
public class Foo
{
    final private Bar bar = ...;
}

// class Bar is package-private
// (visible to all classes in the package, not visible outside the package)
class Bar
{
    ...;
}

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