Basic Java Program Rules

The 1.java interpreter stipulates that:
If a class can be interpreted directly by the interpreter, the class must contain the main method, and
The main method must be decorated with public static void, and the formal parameter of the main method must be
The string array type (string[] args is the form of a string array).

2. A Java source file is recommended to define only one class, and different classes use different source file definitions.

The main file name of the Java source file must have the same name as the public class defined in the source file.

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Basic Java Program Rules