help with getting number sum

[carlcarman]

I wrote this program that reads a txt file named books that contains a list of books and prices. My program arranges the file with the book and price on the same line in the output,this works fine. I need it to sum the total cost of the books on the last line,this part does not work.If anyone could show me what I am doing wrong I wouls greatly appreciate it

package Readafile;
 
import java.io.File;
import java.io.IOException;
import java.util.Scanner;
 
/**
 * @author carl carman
 * 
 */
public class Readafile {
 
    public static void main(String args[]) throws IOException {
 
        File myFile = new File("books.txt");// Accesses books file
        Scanner inputFile = new Scanner(myFile);
        String line = inputFile.nextLine();
        String line1 = inputFile.nextLine();// puts line & line1 on the same
        // line
        System.out.println(line + "----------------" + line1);
        String line2 = inputFile.nextLine();
        String line3 = inputFile.nextLine();// puts line2 & line3 on the same
        // line
        System.out.println(line2 + "------------" + line3);
        String line4 = inputFile.nextLine();
        String line5 = inputFile.nextLine();// puts line4 & line5 on the same
        // line
        System.out.println(line4 + "-----------" + line5);
        String line6 = inputFile.nextLine();
        String line7 = inputFile.nextLine();// puts line6 & line7 on the same
        // page
        System.out.println(line6 + "------------------" + line7);
        System.out.println("");
 
        double sum = 0.0;
        int x = 0;
 
        while (inputFile.hasNext()) {
            if(x++ %2 !=0){
                sum += inputFile.nextDouble();
            }
            else{
                System.out.println(inputFile.next());
            }
}
        System.out.println("total-----------------" + sum);
}
 
}

[Ganon11]

"I need it to sum the total cost of the books on the last line,this part does not work"

OK, how does it not work? Is it getting the wrong sum? Is it not getting anything? Is it printing in the wrong place?

[Ganon11]

Also, if your input file looks like this:

Book1
10.00
Book2
20.00
Book3
30.00

then as you are processing the lines to print them out on the same line (your mess of line1, line2, line3, etc.), and nothing remains in the input file to read into sum.

[carlcarman]

Thanks, you just pointed out what I wasn't seeing. I guess i will have to keep a running total for "my mess" to sum. This is my first java class and right now I am more concerned with keeping it simple and functional rather than "cool".

[r035198x]

After doing it that way, consider writing a Book class with the required fields from the file.
As you read the lines, create some Book objects and add them to an ArrayList.
You will find your Java programming days a lot easier if you always think classes and objects for every problem you get.

[carlcarman]

Thanks I will keep that in mind.
Carl