toString method Null safety

  1. @override
String toString()

A string representation of this object.

Some classes have a default textual representation, often paired with a static parse function (like int.parse). These classes will provide the textual representation as their string representation.

Other classes have no meaningful textual representation that a program will care about. Such classes will typically override toString to provide useful information when inspecting the object, mainly for debugging or logging.


String toString() {
  String _addLeadingZeroIfNeeded(int value) {
    if (value < 10)
      return '0$value';
    return value.toString();

  final String hourLabel = _addLeadingZeroIfNeeded(hour);
  final String minuteLabel = _addLeadingZeroIfNeeded(minute);

  return '$TimeOfDay($hourLabel:$minuteLabel)';