Question

I am trying to write a coded that reads in a text file into an array list. However, I am unsure how to parse my text file into strings to correctly be put into an array list. Here is a sample text file that I need to use.

This should be the sample question.

2
one
two
three
four
0
4
6

My Java code below:

package javaapplication8;

import java.util.*;
import java.io.*;
public class JavaApplication8 {


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

    Scanner inScan = new Scanner(System.in);

    String file_name;
    System.out.print("What is the full file path name?\n>>");
    file_name = inScan.next();

    Scanner fScan = new Scanner(new File(file_name));
    int numItems = Integer.parseInt(fScan.nextLine());
    ArrayList<String> Questions = new ArrayList<String>();

    for(int i=0; i < numItems; i++)
    {
        Questions.add(fScan.nextLine());
    }

    System.out.print("The array is: " + Questions);



}

Answer 1

From your comment about the variable numLines below, you don’t need to parse integers from the content so you can remove the line:

int numItems = Integer.parseInt(fScan.nextLine());

Then to output every line to the array, you can use Scanner.hasNextLine():

while (fScan.hasNextLine()) {
   questions.add(fScan.nextLine());
}