Thread: Identifying invalid calls

Hey guys, quick question here - I'm supposed to identify which calls to the constructor are invalid - here's the code. Note this is not compilable, it's just the example that the book gives.

My first thoughts was down in the main method where it's declaring myCar1 = new Car();, etc. Though I'm not 100% sure.

class Car {
   public String make;
   protected int weight;
   private String color;
 
   private Car (String make, int weight, String color) {
      this.make = make;
      this.weight = weight;
      this.color = color;
   }
 
public Car () {
      this ("unknown", -1, "white");
   }
class ElectricCar extends Car {
   private int rechargeHour;
 
   public ElectricCar() {
      this(10);
   }
 
   private ElectricCar(int charge) {
      super();
      rechargeHour = charge;
   }
}
 
class TestMain {
   public static void main (String[] args) {
      Car   myCar1, myCar2;
      ElectricCar  myElec1, myElec2;
 
      myCar1 = new Car();
      myCar2 = new Car("Ford", 1200, "Green");
      myElec1 = new ElectricCar();
      myElec2 = new ElectricCar(15);
  }
}

Thanks