私は何も間違っていると言っているのはなぜですか？

Question

このプログラムでは、私は何が正しいか間違っている多くの質問を返すことになっています。しかし、私が何を言い表しているかに関係なく、私は20の質問が正しいこと、そして0が間違っていると言うでしょう。誰もがこれを修正する方法を知っているので、それはそれより正確でしょうか？

クラス：

public class KNW_DriverExam 
{ 
    //Create the arrays/Declare variable 
    //Intialize theAnswers array 
    private String[] theAnswers = {"B" , "D" , "A" , "A" , "C" , 
           "A" , "B" , "A" , "C" , "D" , 
           "B" , "C" , "D" , "A" , "D" , 
           "C" , "C" , "B" , "D" , "A" }; 
    private String[] userAnswers; 
    int[] missed = new int [theAnswers.length]; 

    /**The DriverExam method, recieves answers 
    * @param Answer, the answer 
    * */ 
    public KNW_DriverExam(String[] Answer) 
    { 
    userAnswers = new String[theAnswers.length]; 

    for(int i = 0; i < theAnswers.length; i++) 
    { 
     userAnswers[i] = theAnswers[i]; 
    } 
    } 

    /**The passed method, see if user passes or fails 
    * @return true if user passed 
    * @return false if user failed 
    * */ 
    public boolean passed() 
    { 
    if(totalCorrect()>=15) 
    { 
     return true; 
    } 
    else 
    { 
     return false; 
    } 
    } 

    /**The totalCorrect method, see how many user got right 
    * @return correctCount, how many the user got right 
    * */ 
    public int totalCorrect() 
    { 
    int correctCount = 0; 

    for(int i = 0; i < theAnswers.length; i++) 
    { 
     if(userAnswers[i].equalsIgnoreCase(theAnswers[i])) 
     { 
     correctCount++; 
     } 
    } 
    return correctCount; 
    } 

    /**The totalIncorrect method, how many the user got wrong 
    * @return incorrectCount, how many the user got wrong 
    * */ 
    public int totalIncorrect() 
    { 
    int incorrectCount = 0; 

    for(int i = 0; i < theAnswers.length; i++) 
    { 
     if(!(userAnswers[i].equalsIgnoreCase(theAnswers[i]))) 
     { 
     missed[incorrectCount] = i; 
     incorrectCount++; 
     } 
    } 
    return incorrectCount; 
    } 

    /**The missedQuestions method, how many quetions user missed. 
    * @return missed, missed questions 
    * */ 
    public int[] questionsMissed() 
    { 
    return missed; 
    } 
} 

デモ：

import java.util.Scanner; 

public class KNW_DriverExamDemo 
{ 
    public static void main(String[] args) 
    { 
    Scanner input = new Scanner(System.in); 

    System.out.println("Driver's Exam/n"); 
    System.out.println("20 Multiple Choice Questions Mark A,B,C,D"); 

    //Inputting string 
    String[] answers = new String[20]; 
    String answer; 

    for(int i = 0; i < 20; i++) 
    { 
     do 
     { 
     System.out.println((i + 1) + ": "); 
     answer = input.nextLine(); 
     } 
     while(!isValidAnswer(answer)); 
     { 

     answers[i] = answer; 
     } 
    } 

    KNW_DriverExam exam = new KNW_DriverExam(answers); 

    System.out.println("Results\n\n"); 

    System.out.println("Total Correct: " + exam.totalCorrect() + "\n"); 
    System.out.println("Total Incorrect: " + exam.totalIncorrect() + "\n"); 

    if(exam.totalIncorrect() > 0) 
    { 
     System.out.println("The Incorrect Answers Are: "); 
     int missedIndex; 

     for(int i = 0; i < exam.totalIncorrect(); i++) 
     { 
     missedIndex = exam.questionsMissed()[i] + 1; 
     System.out.println(" " + missedIndex); 
     } 
    } 
    } 

    public static boolean isValidAnswer(String answer) 
    { 
    return "A".equalsIgnoreCase(answer) || 
     "B".equalsIgnoreCase(answer) || 
     "C".equalsIgnoreCase(answer) || 
     "D".equalsIgnoreCase(answer); 
    } 

}

Answer 1

があなたのコンストラクタを見てみましょう。 userAnswersに割り当てるときは、theAnswersを使用していて、付属のAnswerは使用していません。

public KNW_DriverExam(String[] Answer) { 
    userAnswers = new String[Answers.length]; 

    for(int i = 0; i < Answers.length; i++) { 
     userAnswers[i] = Answers[i]; 
    } 
}