(Baby name popularity ranking) Revise Programming Exercise 21.11 to prompt the user to enter year, gender, and name and display the ranking for the name. Prompt the user to enter another inquiry or exit the program. Here is a sample run:

/*********************************************************************************
* (Baby name popularity ranking) Revise Programming Exercise 21.11 to prompt the *
* user to enter year, gender, and name and display the ranking for the name.     *
* Prompt the user to enter another inquiry or exit the program. Here is a sample *
* run:                                                                           *
*********************************************************************************/
import java.util.*;

public class Exercise_21_13 {
	protected static Map[] boys = new Map[10];
	protected static Map[] girls = new Map[10];	

	public static void main(String[] args) {
		// Create a Scanner
		Scanner input = new Scanner(System.in);

		getNames(); // Store data

		boolean inquiry;
		do {
			// Prompt the user to enter year, gender and name
			System.out.print("Enter the year: ");
			String year = input.nextLine();
			System.out.print("Enter the gender: ");
			String gender = input.nextLine();
			System.out.print("Enter the name: ");
			String name = input.nextLine();

			// Display the ranking for the name
			System.out.println(getGender(gender.toUpperCase()) + 
				" name " + name + " is ranked #" + 
				getRank(year, gender.toUpperCase(), name) 
				+ " in year " + year);

			// Prompt the user to enter another 
			// inquiry or exit the program
			System.out.print("Enter another inquiry? ");
			inquiry = input.nextLine().toUpperCase().equals("Y"); 

		} while (inquiry);
	}

	/* Returns the specified gender */
	private static String getGender(String gender) {
			return gender.equals("M") ? "Boy" : "Girl";
	}

	/** Stores names and ranks in the arrays */
	private static void getNames() {
		for (int year = 2001, i = 0; year <= 2010 && i < 10; year++, i++) {
			// Create maps for boy and girl names 
			Map<String, String> mapBoys = new HashMap<>();
			Map<String, String> mapGirls = new HashMap<>();

			// Read data from url
			try {
				java.net.URL url = new java.net.URL(
				"http://www.cs.armstrong.edu/liang/data/babynamesranking" 
					+ year + ".txt");
	
				// Create input file from url
				Scanner input = new Scanner(url.openStream());
				while (input.hasNext()) {
					String rank = input.next();
					mapBoys.put(input.next(), rank);
					input.next();
					mapGirls.put(input.next(), rank);
					input.next();
				} 
			}
			catch (java.net.MalformedURLException ex) {
				System.out.println("Invalid URL");
			}
			catch (java.io.IOException ex) {
				System.out.println("I/0 Errors: no such file");
			}

			// Add maps to arrays
			boys[i] = mapBoys;
			girls[i] = mapGirls;
		}
	}

	/** Returns the ranking for the name of the specified year and gender */
	private static String getRank(
			String yr, String gender, String name) {
		int year = Integer.parseInt(yr) - 2001;

		if (gender.charAt(0) == 'M') {
			return boys[year].get(name) + "";
		}
		else
			return girls[year].get(name) + "";

	}
}