Reading txt file into array using scanner

Question

I have a text file that looks roughly like this:

type, distance, length, other,

A, 62, 17, abc,

A, 12, 4,,

A, 6, 90,,

A, 46, 53,,

etc.

Everything is separated by commas, but sometimes there is a blank. I need to be able to read this data into an array using a scanner (not bufferedreader) and be able to account for the blanks somehow, as well as split by commas. Later I will need to be able to calculate things with the data in each column. How do I get this data into the array?

This is what I have so far: (java)

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

public class RunnerAnalysis {

    public static void main(String[] args) throws IOException {

        Scanner keyboard = new Scanner(System.in);

        System.out.print("File: ");
        String filename = keyboard.nextLine();

        File file = new File(filename);
        Scanner inputFile = new Scanner(file);

        inputFile.nextLine();

        String line = inputFile.nextLine();

        while(inputFile.hasNext())
        {
        String[] array = line.split(",");
        }



    }

}

Martijn Courteaux · Accepted Answer · 2011-10-18 15:47:28Z

1

If you really want to use a Scanner, which is IMHO not such a good idea, you can set the delimiter to ,.

Scanner inputFile = new Scanner(...);
inputFile.useDelimiter(",");

while (inputFile.hasNext())
{
    String type = inputFile.next();
    int distance = inputFile.nextInt();
    int length = inputFile.nextInt();
    String other = inputFile.next();

    // Process...
}

I prefer using a BufferedReader in combination with String.split(",").

answered Oct 18, 2011 at 15:47

Martijn Courteaux

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