Definition of the Java_ class-definition of the main function _ rules

import Java.util.Scanner; // the scanner method of introducing Java's Util library (which can be used as a function)  Public class string_if{// define class name string_ifpublicstaticvoid main (string[] agrs) { // defining the main function

1. The class name defined must match the file name
2. The defined class name and file name must be capitalized
3. Import into the library function as well

Definition of the Java_ class-definition of the main function _ rules