toString method

@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.

Implementation

@override
String toString() {
  String ret = "\n$year年\n";
  for (var month in _months) {
    ret += "${month.month}月, 行数：${month.lineCount} ,";
    for (var day in month.days) {
      ret += "$day ";
    }
    ret += "\n";
  }
  return ret;
}