java - Java 文件名中应该或必须

Question

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Answer 1

如评论中所述，这并不像一开始看起来那么清楚，部分原因是 JLS 不需要将包存储在文件系统中:

7.6. Top Level Type Declarations :

If and only if packages are stored in a file system (§7.2), the host system may choose to enforce the restriction that it is a compile-time error if a type is not found in a file under a name composed of the type name plus an extension (such as .java or .jav) if either of the following is true:
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所以你的答案基本上是:

根据您的编译器，它可能是“必须的”。