Create a java applicaiton that creates a quiz application that asks the user 5 m

ID: 3840236 • Letter: C

Question

Create a java applicaiton that creates a quiz application that asks the user 5 multiple choice questions, prompts for an answer, then advises the user if their answer is correct or incorrect. If the user provides the wrong answer the application should provide the user with the correct answer. After the user completes the 5 questions the application should provide the user with a summary of their results including the number of correct and incorrect answers as well as their score (percent). Your application must contain and use at least two custom methods in addition to the main method. Quiz questions and answers must be read from a file named quiz.txt that is placed in the same folder as the java file being executed. The quiz.txt file should contain 10 question & answer combinations. The 5 questions asked should be randomly selected from the questions in this file. You can choose to structure the contents of your quiz.txt file in any way you wish but keep in mind that it should be easy to add additional questions. (It is not part of this exercise, but you should consider how the file should be structured so that questions can be programmatically added and removed.) For this exercise the questions can be on any topic (ie. state capitals) but your application should be built in such a way that the subject of the questions is irrelevant

Here is a sample question:

What is the state capital of Connecticut:

A. Bridgeport

B. Bristol

C. Hartford

D. Norwalk

Explanation / Answer

Program Code to copy:

// QuestionAnswer.java

/**

* Class to maintain each quiz question, corresponding options and the correct answer

import java.util.List;

public class QuestionAnswer

{

String question;

List<String> answers;

String correctAnswer;

public QuestionAnswer()

{

this.question = null;

this.answers = null;

this.correctAnswer = null;

}

public QuestionAnswer(String question, List<String> answers, String correctAnswer)

{

this.question = question;

this.answers = answers;

this.correctAnswer = correctAnswer;

}

public String getQuestion()

{

return question;

}

public void setQuestion(String question)

{

this.question = question;

}

public List<String> getAnswers()

{

return answers;

}

public void setAnswers(List<String> answers)

{

this.answers = answers;

}

public String getCorrectAnswer()

{

return correctAnswer;

}

public void setCorrectAnswer(String correctAnswer)

{

this.correctAnswer = correctAnswer;

}

public String toString()

{

String result = "";

result += question + " ";

for (String str : answers)

result += str + " ";

return result;

}

// QuizTest.java

// import the required classes

import java.util.*;

import java.io.*;

/**

* Program that contains the logic to play the quiz for 5 random questions

* picked from

public class QuizTest

{

// main() method to that starts the execution of the quiz game

public static void main(String args[])

{

// Define a Set class reference of type QuestionAnswer which holds the

// HashSet object. This is used to hold the QuestionAnswer class

// objects

Set<QuestionAnswer> sqa = new HashSet<QuestionAnswer>();

// the iterative variable used in the loop

int i = 0;

// to maintain the number of questions

int count = 5;

// define QuestionAnswer object by using default constructor

QuestionAnswer qa = new QuestionAnswer();

// define a string to hold the file name

String fileName = "quiz.txt";

// loop that keeps count of the number of questions added to the set

while (i < count)

{

// call the getQuestion() by passing the file name and store the

// return QuestionAnswer

// object into qa

qa = getQuestion(fileName);

// condition to check whether the object qa is present in sqa

// call the method doesContainObject() by passing the Set object

// sqa

// and QuestionAnswer object qa. Depending on the returned

// boolean value

// add the object qa to the object sqa.

// Increment the iterative value

if (!doesContainObject(sqa, qa))

{

// add qa to sqa

sqa.add(qa);

i++;

}

// Once the loop got the random 5 questions, then call the

// processQuiz() by passing

// sqa object and count

processQuiz(sqa, count);

}

// processQuiz(): This accepts a Set object and a int variable

// This method is used to display the question and prompt the user for the

// answer. This is repeated for 5 questions. It keeps updating the number

// of correct

// answered and number of wrong answers answered.

public static void processQuiz(Set<QuestionAnswer> sqa, int totalQuestions)

{

// define an iterator for the Set sqa object

Iterator<QuestionAnswer> iterate = sqa.iterator();

// variables to maintain the # correct and # wrong answers

int correctAns = 0, wrongAns = 0;

// define string to hold user input

String answer = null;

// to hold the question

String question = null;

// define a list to store the options for the respective question

List<String> options = new ArrayList<String>();

// define QuestionAnswer object to null

QuestionAnswer quiz = null;

// Scanner object to read the input from the console(user)

Scanner readIn = new Scanner(System.in);

// variable to maintain the question number

int i = 1;

// loop until there are no more objects in the iterator iterate

while (iterate.hasNext())

{

// get the object from the iterate

quiz = iterate.next();

// get the question from the object quiz

question = quiz.getQuestion();

// get the list of options from the object quiz

options = quiz.getAnswers();

// display the question

System.out.println(i + ") " + question);

// loop to display the options

for (String opt : options)

{

System.out.println(" " + opt);

}

// prompt the user for the answer

System.out.print("Your option is: ");

// read the answer

answer = readIn.next().toUpperCase();

// condition to check whether the user input matches with the

// answer present in the object quiz

if (answer.equals(quiz.getCorrectAnswer()))

{

// if matches, increment the correctAns variable

correctAns++;

}

// otherwise

else

{

// display the correct answer

System.out.println(" Wrong Answer! The correct answer is: "

+ quiz.getCorrectAnswer());

// increment the wrongAns

wrongAns++;

}

// increment the question number

i++;

// to provide an empty line after each question

System.out.println();

}

// if all the questions are answered, then print the status

printStatus(correctAns, wrongAns, totalQuestions);

}

// printStatus(): This accepts three int variables

// 1. correct : holds the #of correct answers

// 2. wrong: holds the #of wrong answers

// 3. totalQuestions: hold the #of questions asked

// This method is used to display the status

public static void printStatus(int correct, int wrong, int totalQuestions)

{

// calculate the pass percentage

double percent = correct / (double) totalQuestions * 100;

// display #of correct answers

System.out.println("Number of correct answers: " + correct);

// display #of wrong answers

System.out.println("Number of wrong answers : " + wrong);

// display the pass percent

System.out.println("Percentage pass : " + percent + "%");

}

// doesContainObject(): This accepts Set object and QuestionAnswer object

// Returns a boolean value.

// This method checks whether the question in the qa exists in the sqa

// question

public static boolean doesContainObject(Set<QuestionAnswer> sqa, QuestionAnswer qa)

{

// define a Iterator for the sqa object

Iterator<QuestionAnswer> iterate = sqa.iterator();

// loop until no more elements in the sqa

while (iterate.hasNext())

{

// condition to check the qa question exists in the sqa question

if (iterate.next().getQuestion().equals(qa.getQuestion()))

// if exists, return true

return true;

}

// if question does not exits in sqa then return false

return false;

}

// getQuestion() : This accepts a String object which holds the file name

// Returns the QuestionAnswer object

public static QuestionAnswer getQuestion(String fileName)

{

// define a random object

Random randline = new Random();

// define an index

int index = 0;

// declare the Scanner reference

Scanner sc;

// define the QuestionAnswer object

QuestionAnswer quesAns = new QuestionAnswer();

// define String to read the question from the text file

String question = null;

// define List to read the options from the text file

List<String> answers = null;

// define String to read the correctAnswer from the text file

String correctAns = null;

// since file concept is used, place the logic in try..catch block

try

{

// define the Scanner object to point to the file

sc = new Scanner(new File(fileName));

// loop until the sc points to end of the file

while (sc.hasNextLine())

{

// increment the index value

++index;

// define the ArrayList object

answers = new ArrayList<String>();

// read the question

question = sc.nextLine();

// loop to read the options from the text file

// and add it to the list answers

for (int i = 0; i < 4; i++)

{

answers.add(sc.nextLine());

}

// read the correct answer from the text file

correctAns = sc.nextLine();

// condition to check whether the random value

// at specific index is 0 or not

if (randline.nextInt(index) == 0)

// if true, define the QuestionAnswer object

quesAns = new QuestionAnswer(question, answers, correctAns);

}

// / close the scanner object

sc.close();

}

// catch the exception

catch (FileNotFoundException e)

{

e.printStackTrace();

}

// return the QuestionAnswer object

return quesAns;

}

Sample Output:

1) What is the state capital of Montana?

A. Carson City

B. Montgomery

C. Helena

D. Trenton

Your option is: A

Wrong Answer! The correct answer is: C

2) What is the state capital of Nebraska?

A. Little Rock

B. Phoenix

C. Lincoln

D. Helena

Your option is: B

Wrong Answer! The correct answer is: C

3) What is the state capital of New Hampshire?

A. Carson City

B. Trenton

C. Concord

D. Little Rock

Your option is: C

4) What is the state capital of Arizona?

A. Phoenix

B. Concord

C. Helena

D. Montgomery

Your option is: D

Wrong Answer! The correct answer is: A

5) What is the state capital of Alaska?

A. Helena

B. Juneau

C. Montgomery

D. Concord

Your option is: B

Wrong Answer! The correct answer is: C

Number of correct answers: 1

Number of wrong answers : 4

Percentage pass : 20.0%

Sample Input file: quiz.txt

What is the state capital of Alabama?

A. Concord

B. Montgomery

C. Helena

D. Juneau

What is the state capital of New Jersey?

A. Trenton

B. Helena

C. Carson City

D. Sacramento

What is the state capital of Nevada?

A. Carson City

B. Montgomery

C. Helena

D. Trenton

What is the state capital of Arkansas?

A. Little Rock

B. Helena

C. Phoenix

D. Sacramento

What is the state capital of Arizona?

A. Phoenix

B. Concord

C. Helena

D. Montgomery

What is the state capital of Alaska?

A. Helena

B. Juneau

C. Montgomery

D. Concord

What is the state capital of California?

A. Sacramento

B. Phoenix

C. Juneau

D. Little Rock

What is the state capital of Nebraska?

A. Little Rock

B. Phoenix

C. Lincoln

D. Helena

What is the state capital of Montana?

A. Carson City

B. Montgomery

C. Helena

D. Trenton

What is the state capital of New Hampshire?

A. Carson City

B. Trenton

C. Concord

D. Little Rock

Navigate

Create a java applicaiton that creates a quiz application that asks the user 5 m

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.

Create a java applicaiton that creates a quiz application that asks the user 5 m

Question

Explanation / Answer

Related Questions

Navigate