How to populate contents of a file into an ArrayList?

Question:

I have a file that has two columns of integers that need to be read in and populated into two separate ArrayLists with its content.

Code:

import java.io.*;
import java.util.*;
 
public class FileIntoArray {
   public static void main(String[] args) {
 
      ArrayList<Integer> col1 = new ArrayList<>(); 
      ArrayList<Integer> col2 = new ArrayList<>(); 
 
      try {
         FileInputStream is = new FileInputStream("data.txt");
         BufferedReader br = new BufferedReader(new InputStreamReader(is));
 
         String str;
         String values[]; 
 
         while ((str = br.readLine()) != null) {
            values = str.split(" "); 
            col1.add(Integer.parseInt(values[0])); 
            col2.add(Integer.parseInt(values[1])); 
         }
      } catch (Exception e) {
         // needs better exception handling in real world
         System.out.println(e.toString());
         col1.clear();
         col2.clear();
      }
      System.out.println("col1: " + col1);
      System.out.println("col2: " + col2);
   }
}

Output:

$ java FileIntoArray 
col1: [115, 123, 116, 113, 112, 104, 110, 218, 208]
col2: [257, 253, 246, 243, 239, 239, 238, 243, 242]

$ cat data.txt 
115 257
123 253
116 246
113 243
112 239
104 239
110 238
218 243
208 242