Thread: index help

im trying to do a read/write int property called currentQuestionIndex. This property is the index of the question currently selected, and the value of the property is 0 when a DrivingTest object is first created. I dont understand how to do this. im not sure how to get the index of the current question. i was trying to use an iterator but i dont think i was doin it right.




my question class that hold all my data

 
package cs320Labs.servlet;
 
public class Question {
	String description;
	String answerA;
	String answerB;
	String answerC;
	int correctAnswer;
	int answer;
	boolean answerCorrect;
public Question(){
 
 
}
	public Question(String description, String answerA, String answerB,
			String answerC, int correctAnswer) {
		this.description = description;
		this.answerA = answerA;
		this.answerB = answerB;
		this.answerC = answerC;
		this.correctAnswer = correctAnswer;
 
	}
 
	public String getDescription() {
		return description;
	}
 
	public void setDescription(String description) {
		this.description = description;
	}
 
	public String getAnswerA() {
		return answerA;
	}
 
	public void setAnswerA(String answerA) {
		this.answerA = answerA;
	}
 
	public String getAnswerB() {
		return answerB;
	}
 
	public void setAnswerB(String answerB) {
		this.answerB = answerB;
	}
 
	public String getAnswerC() {
		return answerC;
	}
 
	public void setAnswerC(String answerC) {
		this.answerC = answerC;
	}
 
	public int getCorrectAnswer() {
		return correctAnswer;
	}
 
	public void setCorrectAnswer(int correctAnswer) {
		this.correctAnswer = correctAnswer;
	}
 
	public int getAnswer() {
		return answer;
	}
 
	public void setAnswer(int answer) {
		this.answer = answer;
	}
 
	public boolean isAnswerCorrect() {
 
		if (this.answer == correctAnswer) {
			return answerCorrect == true;
 
		} else {
			return answerCorrect == false;
		}
	}
 
	public void setAnswerCorrect(boolean answerCorrect) {
		this.answerCorrect = answerCorrect;
	}
 
	public static void main(String[] args) {
 
	}
 
}

my driving test class

 
public class DrivingTest {
	static List<Question> driveTestQ = new ArrayList<Question>();
	DrivingTest(){
 
		List<Question> driveTestQ = new ArrayList<Question>();
 
		File file = new File("C:/Users/Anthony/Desktop/DrivingTest.txt");
 
		try {
 
			Scanner scanner = new Scanner(file);
 
			while (scanner.hasNextLine()) {
				//store first line into qestions
				String question = scanner.nextLine().trim();
				if (question.length() == 0)
					continue;
 
				String[] answers = new String[3];
             // store answers into answers array
				answers[0] = scanner.nextLine();
				answers[1] = scanner.nextLine();
				answers[2] = scanner.nextLine();
				// stores correct answer
				int correct_answer = Integer.parseInt(scanner.nextLine());
                //adds into array list, mus tmatch ur Quetions class
				driveTestQ.add(new Question(question, answers[0], answers[1],
						answers[2], correct_answer));
 
 
 
			}
			scanner.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		}
 
	}
 
	public static int getCurrentQuestionIndex(){
		ListIterator listIterator = driveTestQ.listIterator();
		return listIterator.nextIndex();
 
 
	}
	public static int setCurrentQuestionIndex(int index){
 
 
		return index;
 
 
	}
 
	public static int getCurrentQuestion(){
		return 0;
 
 
	}
	public static boolean islastQuestion (){
 
		boolean current_question = false;
		boolean last_question = false;
		if(current_question==last_question){
			return false;
 
		}
		return true;
 
	}
 
	public static int getScore(){
 
		int number_of_correct_answers = 0;
		int number_of_questions = 0;
		int score;
		score =(int) ((double)Math.round(100 * number_of_correct_answers / number_of_questions));
		return score;
 
 
	}
 
	public static void main(String[] args) {
 
		DrivingTest test = new DrivingTest();
		System.out.println(test.getCurrentQuestionIndex());
		System.out.println(test.setCurrentQuestionIndex(2));
 
 
//		 while( true )
//		    {
//		        // display the current question
//		        Question question = DrivingTest.getCurrentQuestion();
//		        System.out.println( question.getDescription() );
//		        System.out.println( "\t" + question.getAnswerA() );
//		        System.out.println( "\t" + question.getAnswerB() );
//		        System.out.println( "\t" + question.getAnswerC() + "\n" );
//		
//		        // set the answer to the current question to 1
//		        DrivingTest.getCurrentQuestion().setAnswer( 1 );
//		
//		        // if this is the last question, we are done.
//		        if( DrivingTest.islastQuestion() ) break;
//		
//		        // it is not the last question, so increment CurrentQuestionIndex
//		        int currentQuestionIndex = DrivingTest.getCurrentQuestionIndex();
//		       DrivingTest.setCurrentQuestionIndex( currentQuestionIndex + 1 );
//		    }
//		
//		    // display the test score
//		    System.out.println( "Your test score is: " + DrivingTest.getScore() );
//		}
//		
	}
}

Originally Posted by Norm

Are you asking about the contents of a variable in the program
or about reading a value from a file?

hah im confused in that as well . but i guess it would be the contents of a variable . my program reads in a text file , and in that text file the first line is a question. so im supposed use this method to grab whatever the index of the current question is.

i gotcha guys , thanks. ill try it as soon as i get off of work lol. thanks for the help! the first value should be 0.