Basic java Program structure

Main.java

// Import statements (if any)
import java.util.Scanner;

// Class definition
public class Main {

    // Main method
    public static void main(String[] args) {
        // Variable declaration and initialization
        int number = 0;

        // Object creation
        Scanner input = new Scanner(System.in);

        // Input
        System.out.println("Enter a number: ");
        number = input.nextInt();

        // Output
        System.out.println("You entered: " + number);
    }
}