parseLong static method

Long parseLong(
  1. String str, [
  2. int radix = 10
])

Parses a string to a Long.

str the string to parse radix the radix to use for parsing (default is 10)

Throws InvalidFormatException if the string cannot be parsed.

A wrapper class for large integers that provides Java-like functionality.

This class wraps Dart's int type but is designed for large integer values, similar to Java's Long class.

Example usage:

Long a = Long(9223372036854775807);
Long b = Long.valueOf(1000000000000);
Long c = Long.parseLong("123456789012345");

print(a.toString()); // "9223372036854775807"
print(a.compareTo(b)); // 1

Implementation

static Long parseLong(String str, [int radix = 10]) {
  try {
    return Long(int.parse(str, radix: radix));
  } catch (e) {
    throw InvalidFormatException('Invalid long value: $str');
  }
}