Class definitions in Dart

classes.dart

class Computer {
  String hostname;
  int numberOfCores;

  // Syntactic sugar for instance variable assignment
  Computer(this.hostname, this.numberOfCores) {
    // Some initialization code
  }

  void ping() {
    print('Pong from $hostname');
  }
}

void main() {
  var comp = new Computer('localhost', 4);
  comp.ping();
}