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Thread: Start.java:22: error: cannot find symbol

  1. #1
    Junior Member
    Join Date
    Nov 2013
    Thanked 0 Times in 0 Posts

    Angry Start.java:22: error: cannot find symbol

    Can any one help me to resolve my below coding problem?

    Start.java:22: error: cannot find symbol
    symbol: method DriverExam(char)
    location: variable result of type DriverExam[]

    import java.util.Scanner;
    import java.io.*;

    public class Start
    {//start of class
    public static void main(String[] args)
    {//start of main

    Scanner keyboard = new Scanner(System.in);

    DriverExam[] result = new DriverExam[20];

    char ans;
    String input;
    System.out.print("================================ ===============================");

    for (int q = 1; q < result.length; q++)
    System.out.print("\nPlease answer from the options given (A, B, C, or D).");
    input = keyboard.nextLine();
    ans = input.charAt(0);

    System.out.print("The result of your exam :" + result.passed());
    System.out.print("The total no. of correct answers are: " + result.totalCorrect());
    System.out.print("The total no. of incorrect answers are: " + result.totalIncorrect());
    System.out.print("The total no. of missed answers are: " + result.questionMissed());

    }//end of main
    }//end of class

    public class DriverExam
    {//start of class
    private final int PASSING = 15;
    private char[] correct = {'X', 'B', 'D', 'A', 'A', 'C',
    'A', 'B', 'A', 'C', 'D',
    'B', 'C', 'D', 'A', 'D',
    'C', 'C', 'B', 'D', 'A'};

    private char[] student;
    private int[] missed;
    private int numCorrect = 0;
    private int numIncorrect = 0;

    public DriverExam(char[] s)
    {//Start of constructor
    student = new char[correct.length];

    for (int q = 1; q < student.length; q++)
    {//Start of for loop
    student[q] = s[q];
    }//End of for loop

    }//End of constructor

    private void gradeExam()
    {//Start of method
    for (int q = 1; q < correct.length; q++)
    {//Start of for loop
    if (student[q] == correct[q])
    numCorrect = numCorrect +1;
    numIncorrect = numIncorrect +1;
    }//End of for loop

    if (numIncorrect > 0)
    }//End of method

    private void makeMissedArray()
    {//Start of method
    missed = new int[numIncorrect];
    int m = 0;

    for (int q = 1; q < correct.length; q++)
    {//Start of for loop
    if (student[q] != correct[q])
    missed[m] = q;
    m = m + 1;
    }//End of for loop
    }//End of method

    public boolean passed()
    return (numCorrect >= PASSING);

    public int totalCorrect()
    return numCorrect;

    public int totalIncorrect()
    return numIncorrect;

    public int[] questionsMissed()
    {//Start of method
    if(numIncorrect == 0)
    return null;

    int[] temp = new int[numIncorrect];

    for (int n = 0; n < missed.length; n++)
    temp[n] = missed[n];

    return temp;
    }//End of method

    }//end of class

  2. #2
    Super Moderator Norm's Avatar
    Join Date
    May 2010
    On vacation
    Thanked 2,243 Times in 2,215 Posts

    Default Re: Start.java:22: error: cannot find symbol

    The code is using the wrong arg when it calls driverExam.
    The method is defined to take a char[]
    the call is using a char as arg.

    Either change the method to take a char
    or change the call to the method to pass a char[]

    Please edit your post and wrap your code with code tags:
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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