Write a simple phonebook program that reads in a series of name-number pairs from the user (that is, name and number on one line separated by whitespace) and stores them in a Map from Strings to Integers. Then ask the user for a name and return the matching number, or tell the user that the name wasn't found.

import java. util. HashMap;

import java. util. Map;

import java. util. Scanner;

public class PhoneBook {

public static void main (String[] args) {

Scanner in = new Scanner (System. in);

Map map = new HashMap ();

String name, number, choice;

do {

System. out. print ("Enter name: ");

name = in. next ();

System. out. print ("Enter number: ");

number = in. next ();

map. put (name, number);

System. out. print ("Do you want to try again (y or n) : ");

choice = in. next ();

} while (! choice. equalsIgnoreCase ("n"));

System. out. print ("Enter name to search for: ");

name = in. next ();

if (map. containsKey (name)) {

System. out. println (map. get (name));

} else {

System. out. println (name + " is not in the phone book");

}

}

}