Convert a string of number with commas to a long

Question:

How can I convert String of numbers with commas to Long?

Answer:

Remove commas from the string with str.replaceAll(",", "").

or

Use the NumberFormat class.

Code:

import java.text.NumberFormat;
import java.util.Locale;
import java.text.ParseException;
 
public class NumbersWithCommas {
   public static void main(String[] args) {
 
      String str = "1,234,567,890";
 
      // remove all commas in the string
      long l1 = Long.valueOf(str.replaceAll(",", "").toString());
      System.out.println("l1: " + l1);
 
      NumberFormat format = NumberFormat.getInstance(Locale.US);
      Number number = 0;
      try {
         number = format.parse(str);
      } catch (ParseException e) {
         e.printStackTrace();
      }
      long l2 = number.longValue();
      System.out.println("l1: " + l1);
   }
}

Output:

$ java NumbersWithCommas
l1: 1234567890
l1: 1234567890