import java.util.Scanner;

/**
*
* @author
*/
public class Main {

/**
* main function
*
* @param args
*/
public static void main(String[] args) {

   int option = 0;

   // i) creates an object of each of the other classes,
   ContactList list = new ContactList();
   Scanner scanner = new Scanner(System.in);
   String fileName;
   String lastName;

   // ii) calls each method on each of the objects it creates, and
   do {
         System.out.print("Enter your option\n"
               + "0. Quit & Save\n"
               + "1. Add a new person to contact list\n"
               + "2. Read contact from a file\n"
               + "3. Show contact by last name\n"
               + "4. Show all contact\n"
               + "--> ");
         option = Integer.parseInt(scanner.nextLine());

         switch (option) {
            case 0:
               System.out.print("Enter a file name to save to: ");
               fileName = scanner.nextLine();
               list.saveToFile(fileName);
               break;
            case 1:
               list.addPerson(getPerson(scanner));
               break;
            case 2:
               System.out.print("Enter a file name to read from: ");
               fileName = scanner.nextLine();
               list.readFromFile(fileName);
               break;
            case 3:
               System.out.print("Enter a last name to search for: ");
               lastName = scanner.nextLine();
               list.showPersonByLastName(lastName);
               break;
            case 4:
               System.out.println("All contact:");
               list.printContact();
               break;
         }

   } while (option != 0);

   // iii) prints a message at the end that shows that the entire program compiled and ran.
   System.out.println("");
   System.out.println("All contact:");
   list.printContact();
}

Assignment 4 â€œThe medium is the message.â€ The emphasis for th...

Assignment 4 â€œThe medium is the message.â€ The emphasis for th...