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Monday, 16 January 2017

Chapter 20 Exercise 3, Introduction to Java Programming, Tenth Edition Y. Daniel LiangY.

20.3 (Guessing the capitals)
Rewrite Programming Exercise 8.37 to store the pairs of states and
capitals so that the questions are displayed randomly.


import java.util.*;

public class Exercise_03 {
    public static void main(String[] args) {

        LinkedList<String[]> list = new LinkedList<>();

        Collections.addAll(list, stateCapitals);

        Scanner input = new Scanner(System.in);
        int correctCount = 0;
        while (list.size() > 0) {
            Collections.shuffle(list);
            String[] s = list.pollFirst();
            System.out.print("What is the capital of " + s[0] +"? ");
            if (input.nextLine().equalsIgnoreCase(s[1])) {
                correctCount++;
                System.out.println("Your answer is correct!");
            } else {
                System.out.println("WRONG - The correct answer is " + s[1]);
            }
        }
        System.out.println("The correct count is " + correctCount);
    }

    private static String[][] stateCapitals = {
            {"Alabama", "Montgomery"},
            {"Alaska", "Juneau"},
            {"Arizona", "Phoenix"},
            {"Arkansas", "Little Rock"},
            {"California", "Sacramento"},
            {"Colorado", "Denver"},
            {"Connecticut", "Hartford"},
            {"Delaware", "Dover"},
            {"Florida", "Tallahassee"},
            {"Georgia", "Atlanta"},
            {"Hawaii", "Honolulu"},
            {"Idaho", "Boise"},
            {"Illinois", "Springfield"},
            {"Maryland", "Annapolis"},
            {"Minnesota", "Saint Paul"},
            {"Iowa", "Des Moines"},
            {"Maine", "Augusta"},
            {"Kentucky", "Frankfort"},
            {"Indiana", "Indianapolis"},
            {"Kansas", "Topeka"},
            {"Louisiana", "Baton Rouge"},
            {"Oregon", "Salem"},
            {"Oklahoma", "Oklahoma City"},
            {"Ohio", "Columbus"},
            {"North Dakota", "Bismark"},
            {"New York", "Albany"},
            {"New Mexico", "Santa Fe"},
            {"New Jersey", "Trenton"},
            {"New Hampshire", "Concord"},
            {"Nevada", "Carson City"},
            {"Nebraska", "Lincoln"},
            {"Montana", "Helena"},
            {"North Carolina", "Raleigh"},
            {"Missouri", "Jefferson City"},
            {"Mississippi", "Jackson"},
            {"Massachusetts", "Boston"},
            {"Michigan", "Lansing"},
            {"Pennsylvania", "Harrisburg"},
            {"Rhode Island", "Providence"},
            {"South Carolina", "Columbia"},
            {"South Dakota", "Pierre"},
            {"Tennessee", "Nashville"},
            {"Texas", "Austin"},
            {"Utah", "Salt Lake City"},
            {"Vermont", "Montpelier"},
            {"Virginia", "Richmond"},
            {"Washington", "Olympia"},
            {"West Virginia", "Charleston"},
            {"Wisconsin", "Madison"},
            {"Wyoming", "Cheyenne"}
    };
}

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