Java Handy Sticker 1

1. When there is only one class in the file, the filename must match the class name.

2. There can be at most one public class when there is more than one class in the file.

3. When there is more than one class in the file, and there is no public class, the file name can be any class name. At compile time, a corresponding binary (. class file) is generated for each class, and the file name is the class name.

4. When there is more than one class in the file, and there is a public class, the class name must be the public class name.

Java Handy Sticker 1