Array, I/O with a .txt file problems

[basketball8533]

Okay now i have a .txt file thats called questions... and it looks similar to this

5 // 5 is for the number of questions
How many different three-member teams can be formed from six students?
4 // number of answers
20
120
216
720
1 // the answer
0 // the number of times the q was answered
0 // the number of times the q was answered correctly
Which Steeler was named Super Bowl IX MVP?
3
Terry Bradshaw
Lynn Swann
Franco Harris
3
0
0


as you see thats just 2 questions... i need to have each question display one at a time... i have no idea how to put this into an array... here is my code:

public String getQuestion (Question[] array, String qq) 
	{ 
             try { 
			x = new Scanner(new File("questions.txt"));
			
		}
		 catch(Exception e) {
			 System.out.println("could not find file");
		 }
		
		
             for(int index = 0; index <array.length; index++)
				 
			 {
				while (x.hasNextLine() && index < array.length)
				{
					
					//array[index] = x.nextLine();
 				String a = x.nextLine();
				 
				 System.out.printf("%s\n", a);
				 
				}
			 }
		 
          x.close();
return question;
	}

public class Assig3 {

	public static void main (String [] args) throws IOException 
	{
		
		
		
       String questions1 = "";
	   final int SIZE = 5;
	   Question [] allQuestions = new Question [SIZE];
       Question q = new Question ();
        }

if someone could give me an example id really appreciate it

[eRaaaa]

How does your Question class look like?

>>"i have no idea how to put this into an array"

first, read the first line / integer. after that you know how many times you have to iterate -> write a loop from 0 to the number of questions and create a question array of that size.
in the loop read the next two lines. store the first in a string (question), the second in an integer. create an array(answers) with the size of that integer.
then you have to write another "nested" loop from 0 to the number of answers/arrays length and read next lines and store them into the array.
read a next line again to get the right answer(rightAnswer)
after that, create a question instance e.g. new Question(question,answers,rightAnswer);
and store it to the first created "question" array.
thats all :)

maybe you should reconsider the file. perhaps xml or json would be better and easier to handle?!

[basketball8533]

hey thanks i will give it a try.. i have tho created an array of SIZE 5 and sent that to my Question.java class in the getQuestion method... but i just didn't what to do since the integer 5 was the first line of my questions.txt document..how to go through each question.. Here is my Question class:

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

// class represents the questions
public class Question {
    
	private int correctAnswer;  // needed 
    private int numberTried;  // needed
    private int numberCorrect;  // needed
	private String question; 
	Question [] answers; // array of strings for answers
	private Scanner x;
	
	public Question()  // constructor...size array of answers
	{
			
		
	}

	public String getQuestion (int[] allQuestions, String qq) 
	{

		try { 
			x = new Scanner(new File("questions.txt")); // brings in file assigns file to x 
			
		}
		 catch(Exception e) {
			 System.out.println("could not find file");
		 }
			
			 
		 
			 for(int index = 0; index <allQuestions.length; index++)
			 
			 { 
				
				 
				
				while (x.hasNextLine() && index < allQuestions.length)
				{
					
					//array[index] = x.nextLine();
 				String a = x.nextLine();
				 
				 System.out.printf("%s\n", a);
				 
				}
			 }
			 
			 
			 
			
			 
			 
			 
		 
          x.close();
		return question;
		
	

	}
	
	
	
	
	
	
	public int getAnswer()
	{
		return correctAnswer;
	}
	
	public int getTries()
	{
		return numberTried;
	}
	
	public int getCorrect()
	{
		return numberCorrect;
	}
	
	
	
} // end Question class

this program will execute but whenever it does all it does is display my WHOLE questions.txt document

[basketball8533]

Ok so i have modified it and i have got to here:

public class Question {
    
	private int correctAnswer;  // needed 
    private int numberTried;  // needed
    private int numberCorrect;  // needed
	private String question; 
     // array of strings for answers
	
	
	public Question()  // constructor...size array of answers
	{
			
		
	}

	public String getQuestion (int[] allQuestions, String qq, String answer) throws IOException 
	{
	int index = 0;
	question = qq;
	
		
	File file = new File ("questions.txt");
	Scanner inputFile = new Scanner (file);
	
	 int numQ = inputFile.nextInt();
	
			  for (index = 0; index < allQuestions.length; index++)
			  {
				  
				  
                  question = inputFile.nextLine();
                 
                
                 
              	System.out.print(question);
              	
			  }
			  
			
              	
			
		  
		    	
		
	
		
				return question;
		
		
		
			 }
		
		
			 }

This is the output: How many different three-member teams can be formed from six students?420120


which i need to just show the answers underneath...
any ideas

[bayan]

Usually when you have a small problem like this a temporary workaround is usually the answer for me, although this solution is probably going to be frowned upon by others:

if it's only a single digit number:

// Remove the extra number at the beginning
question = question.substring(1);

if it's multiple digits:

try{
       for(int i = 0; i < question.length(); i++){

               Integer.parseInt(question.substring(0,1));
               question = question.substring(1);
       }
}
catch(Exception e){

        return question;
}

return question;