Question

read the code and comments, and fix the program by INSERTING the missing code
in Java THank you please

import java.util.Scanner;

public class ExtractNames
{
    // Extract (and print to standard output) the first and last names in "Last, First" (read from standard input).
    public static void main(String[] args)
    {
        // Set up a Scanner object for reading input from the user (keyboard).
        Scanner scan = new Scanner (System.in);
        
        // Read a full name from the user as "Last, First".
        System.out.println ("Enter your full name as Last, First");
        String fullName = scan.nextLine ();
        
        // Find the index of the comma in the String entered by the user,
        // because the comma separates the last name from the first name.
        int positionOfComma =  *** INSERT CALL TO indexOf METHOD HERE ;
        
        // Extract the last and first names based on the index of the comma.
        String lastName = fullName.substring ( *** INSERT PARAMETERS HERE );
        String firstName = fullName.substring ( *** INSERT PARAMETERS HERE );
        
        // Print the first name and last name.
        System.out.println ("First name: " + firstName);
        System.out.println ("Last name: " + lastName);
        
    } // end main
    
} // end ExtractNames

Answer 1

import java.util.Scanner;

public class ExtractNames
{
    // Extract (and print to standard output) the first and last names in "Last, First" (read from standard input).
    public static void main(String[] args)
    {
        // Set up a Scanner object for reading input from the user (keyboard).
        Scanner scan = new Scanner (System.in);

        // Read a full name from the user as "Last, First".
        System.out.println ("Enter your full name as Last, First");
        String fullName = scan.nextLine ();

        // Find the index of the comma in the String entered by the user,
        // because the comma separates the last name from the first name.
        int positionOfComma =  fullName.indexOf(',');

        // Extract the last and first names based on the index of the comma.
        String lastName = fullName.substring (0,positionOfComma);
        String firstName = fullName.substring (positionOfComma+2,fullName.length());

        // Print the first name and last name.
        System.out.println ("First name: " + firstName);
        System.out.println ("Last name: " + lastName);

    } // end main

} // end ExtractNames