Exercise04_10.java

package ch_04;

import java.util.*;

/**
 * *4.10 (Guess birthday) Rewrite Listing 4.3, GuessBirthday.java, to prompt the user to
 * enter the character Y for Yes and N for No rather than entering 1 for Yes and 0
 * for No
 */
public class Exercise04_10 {
    public static void main(String[] args) {
        String set1 =
                " 1 3 5 7\n" +
                        " 9 11 13 15\n" +
                        "17 19 21 23\n" +
                        "25 27 29 31";
        String set2 =
                " 2 3 6 7\n" + "10 11 14 15\n" +
                        "18 19 22 23\n" +
                        "26 27 30 31";
        String set3 =
                " 4 5 6 7\n" +
                        "12 13 14 15\n" +
                        "20 21 22 23\n" +
                        "28 29 30 31";
        String set4 =
                " 8 9 10 11\n" +
                        "12 13 14 15\n" +
                        "24 25 26 27\n" +
                        "28 29 30 31";
        String set5 =
                "16 17 18 19\n" +
                        "20 21 22 23\n" +
                        "24 25 26 27\n" +
                        "28 29 30 31";
        int day = 0;
        // Create a Scanner
        Scanner input = new Scanner(System.in);
        // Prompt the user to answer questions
        System.out.print("Is your birthday in Set1?\n");
        System.out.print(set1);
        System.out.print("\nEnter n for No and y for Yes: ");
        String a = input.next("[yYnN]");
        char answer = a.charAt(0);
        if (answer == 1)
            day += 1;
        // Prompt the user to answer questions
        System.out.print("\nIs your birthday in Set2?\n");
        System.out.print(set2);
        System.out.print("\nEnter n for No and y for Yes: ");
        a = input.next("[yYnN]");
        answer = a.charAt(0);
        if (answer == 89 || answer == 121)
            day += 2;
        // Prompt the user to answer questions
        System.out.print("Is your birthday in Set3?\n");
        System.out.print(set3);
        System.out.print("\nEnter n for No and y for Yes: ");
        a = input.next("[yYnN]");
        answer = a.charAt(0);
        if (answer == 89 || answer == 121)
            day += 4;
        // Prompt the user to answer questions
        System.out.print("\nIs your birthday in Set4?\n");
        System.out.print(set4);
        System.out.print("\nEnter n for No and y for Yes: ");
        a = input.next("[yYnN]");
        answer = a.charAt(0);
        if (answer == 89 || answer == 121)
            day += 8;
        // Prompt the user to answer questions
        System.out.print("\nIs your birthday in Set5?\n");
        System.out.print(set5);
        System.out.print("\nEnter n for No and y for Yes: ");
        a = input.next("[yYnN]");
        answer = a.charAt(0);
        if (answer == 89 || answer == 121)
            day += 16;
        System.out.println("\nYour birthday is " + day + "!");
    }
}