import java.util.*;
import java.util.Scanner;
/**
 * Write a description of class PhoneBook here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
public class PhoneBook{
    Map<List, String> phonebook = new HashMap<>();
    List<String> multipleNumbers = new LinkedList<>();
 //   public static boolean electronicPhonebook = true;
 //   Scanner input = new Scanner(System.in);
 //   Collection<String> c;
 //   Iterator<String> iter = c.iterator();
    public PhoneBook(){
    }
    public void add(List multipleNumbers, String name){
        phonebook.put(multipleNumbers, name);
    }
    
    public void remove(String name){
        phonebook.remove(name);
    }

    public String lookup(String name){
        return phonebook.get(name);
    } 
    
    public String reverseLookup(List number){
        return phonebook.get(number);
    }
    
    public void display(){
        System.out.println("                         ***** WLECOME TO THE WORLD BOOK *****           ");
        for (Map.Entry<List,String> entry : phonebook.entrySet()){
            System.out.println("Όνομα: \n" + entry.getValue() + "\n" +
            "Αριθμός τηλεφώνου:" + "\n" + entry.getKey() + "\n");
        }
    }
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    //  public void addMultiple(){
  //
     //   while(electronicPhonebook = true){
    //        System.out.println("Enter a number and then a name. ");
   //         String number = input.nextLine();
    //        String name = input.nextLine();
    //        phonebook.put(number, name);
    //        
    //        System.out.println("Are you done adding entries¿");
    //        String exit = input.nextLine();
    //            if (exit.equalsIgnoreCase("yes") || exit.equalsIgnoreCase("yeah") || exit.equalsIgnoreCase("Affirmative")){
   //                 electronicPhonebook = false;
     //           } else
    //            if (exit.equalsIgnoreCase("no") || exit.equalsIgnoreCase("nope") || exit.equalsIgnoreCase("nah")){
    //                System.out.println("Okay...");
    //            } else {System.out.println("I guess not...");
   //             }
     //   }
   // }
    
    
 //   public static void commandCenter(){
 //       PhoneBook runningbook = new PhoneBook();
 //       while(electronicPhonebook = true){
 //           runningbook.addMultiple();
 //       }
 //       
 //   }
    }