Slip No 21 Q B

Q.Create a hashtable containing city name & STD code. Display the details of the hashtable. Also search for a specific city and display STD code of that city.[25 M]

import java.util.*;

class HashtableDemo
{
    public static void main(String args[])
    {
        // Create Hashtable
        Hashtable<String, Integer> ht = new Hashtable<String, Integer>();

        // Add city and STD code
        ht.put("Pune", 020);
        ht.put("Mumbai", 022);
        ht.put("Delhi", 011);
        ht.put("Chennai", 044);
        ht.put("Nagpur", 0712);

        // Display Hashtable
        System.out.println("City and STD Codes:");
        Enumeration<String> e = ht.keys();

        while(e.hasMoreElements())
        {
            String city = e.nextElement();
            System.out.println(city + " : " + ht.get(city));
        }

        // Search specific city
        Scanner sc = new Scanner(System.in);
        System.out.print("\nEnter city to search: ");
        String searchCity = sc.next();

        if(ht.containsKey(searchCity))
        {
            System.out.println("STD Code of " + searchCity + " is " + ht.get(searchCity));
        }
        else
        {
            System.out.println("City not found in Hashtable");
        }
    }
}