Exercise12_32.java

package ch_12;

import java.io.File;
import java.io.IOException;
import java.util.Scanner;

/**
 * 12.32 (Ranking summary) Write a program that uses the files described in Programming Exercise 12.31
 * and displays a ranking summary table for the first five
 * girl’s and boy’s names as follows:
 * <p>
 * | Year | Rank 1   |  Rank 2 | Rank 3 |   Rank 4 | Rank 5 |   Rank 1 |  Rank 2 |  Rank 3  |  Rank 4  | Rank 5 |
 * | 2010 | Isabella |  Sophia | Emma   |  Olivia  | Ava    |   Jacob  |  Ethan  |  Michael |  Jayden  |  William |
 * | 2009 | Isabella |  Emma   | Olivia | Sophia   | Ava    |   Jacob  | Ethan   |  Michael | Alexander|  William |
 * | ...  |          |         |        |          |        |          |         |          |          |          |
 * | 2001 | Emily    | Madison | Hannah | Ashley   | Alexis |   Jacob  |  Michael| Matthew  | Joshua  | Christopher|
 */
public class Exercise12_32 {
    private static final String FILENAME_PREFIX = "babynameranking";
    private static final String workingDir = "ch_12/exercise12_31";

    public static void main(String[] args) {
        int year = 2010, endYear = 2001;
        System.out.println("__________________________________________________________________________________________________________");
        System.out.printf("%-10s%-10s%-10s%-10s%-10s%-10s%-10s%-10s%-10s%-10s%-10s%n",
                "Year", "Rank 1", "Rank 2", "Rank 3", "Rank 4", "Rank 5", "Rank 1", "Rank 2", "Rank 3", "Rank 4", "Rank 5");
        System.out.println("__________________________________________________________________________________________________________");
        while (year >= endYear) {
            String fileName = FILENAME_PREFIX + year + ".txt";
            File file = new File(workingDir, fileName);

            try (Scanner fileScanner = new Scanner(file)) {

                printFirst5Records(fileScanner, year);

            } catch (IOException ioException) {
                ioException.printStackTrace();
                System.exit(1);
            }
            year--;
        }
    }

    private static void printFirst5Records(Scanner scanner, int year) {
        String[] girlsNames = new String[6];
        girlsNames[0] = String.valueOf(year);
        String[] boysNames = new String[5];

        int idxGirls = 1, idxBoys = 0;
        for (int i = 0; i < 5; i++) {
            String[] record = scanner.nextLine().split("\\s+"); //Example: 1	Jacob	32,550	Emily	25,057
            boysNames[idxBoys++] = record[1];
            girlsNames[idxGirls++] = record[3];
        }
        for (String girlsName : girlsNames) {
            System.out.printf("%-10s", girlsName);
        }

        for (String boysName : boysNames) {
            System.out.printf("%-10s", boysName);
        }
        System.out.println();

    }
}