Java-to-Dart codelab: Rectangle example

main.dart

import 'dart:math';

class Rectangle {
  int width;
  int height;
  Point origin;
  
  Rectangle({this.origin = const Point(0,0), this.width = 0, this.height = 0});
  
  @override
  toString() => 'Origin (${origin.x}, ${origin.y}), width: $width, height: $height';
}

main() {
  print(Rectangle(origin: const Point(10, 20), width: 100, height:  200));
  print(Rectangle(origin: const Point(10,10)));
  print(Rectangle(width: 200));
  print(Rectangle());
}