Why Must Java File Names Match Public Class Names?

Why the File Name and Public Class Name Align in Java

Java enforces a convention where the file name and the public class name within that file must match. While some may question this restriction, it serves a specific purpose.

Java takes a firm stance on preventing unnecessary choices that can compromise the programming experience. This is evident in the limitations imposed on filenames, packages, public class count within a file, and the prevention of class splitting across multiple files. These decisions prioritize consistency and maintainability.

Critics may argue for the utility of accessor methods (getters and setters), but Java views them as drawbacks. Getters can expose implementation details, while setters promote a data-centric approach rather than object-oriented communication. Exceptions exist, such as the essential String.length() method, but getters and setters should be used judiciously.

By aligning the file name with the public class name, Java maintains a clear and organized structure. This consistency benefits large teams working on complex projects across multiple locations. It eliminates potential ambiguity and facilitates effective code management. While it may seem like a minor detail, this design decision contributes to the robust and maintainable nature of Java applications.

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