JAVA ДЛЯ ПОТОКОВ ИВБО / ПР-2 / Car

public class Car {
        String model;
        String license;
        String color;
        static int year;

        public Car(String model, String license, String color, int year){
          this.model = model;
          this.license = license;
          this.color = color;
          this.year = year;
        }
        public Car(){
            model = "car";
            license = "";
            color = "red";
            year = 2020;
        }
        public Car(String color,int year){
            this.color = color;
            this.year = year;
        }
        public String toString(){
            return "This a car, model " + model + " , license " + license + " color car" + color + " year" + year;
        }
        public void setColor(String color){
        this.color = color;
        }
        public int getDiffYear(int currentYear){
        return currentYear - this.year;
        }
}