Builder pattern - using inner class

Car.java

package com.app.designPatterns.builder3;

public class Car {

    private final String make;
    private final Integer price;
    private final Boolean sunroof;
    private final Boolean alloyWheels;
    private final Boolean cruiseControl;
    private final Boolean electricSeats;

    public Car(CarBuilder carBuilder){
        this.make = carBuilder.make;
        this.price = carBuilder.price;
        this.sunroof = carBuilder.sunroof;
        this.alloyWheels = carBuilder.alloyWheels;
        this.cruiseControl = carBuilder.cruiseControl;
        this.electricSeats = carBuilder.electricSeats;
    }

    static class CarBuilder{

        private String make;
        private Integer price;
        private Boolean sunroof;
        private Boolean alloyWheels;
        private Boolean cruiseControl;
        private Boolean electricSeats;

        public Car build(){
            return new Car(this);
        }

        public CarBuilder(String make){
            this.make = make;
        }

        public CarBuilder price(Integer price){
            this.price = price;
            return this;
        }

        public CarBuilder sunroof(Boolean sunroof){
            this.sunroof = sunroof;
            return this;
        }

        public CarBuilder alloyWheels(Boolean alloyWheels){
            this.alloyWheels = alloyWheels;
            return this;
        }

        public CarBuilder cruiseControl(Boolean cruiseControl){
            this.cruiseControl = cruiseControl;
            return this;
        }

        public CarBuilder electricSeats(Boolean electricSeats){
            this.electricSeats = electricSeats;
            return this;
        }
    }

    @Override
    public String toString() {
        return "Car{" +
                "make='" + make + '\'' +
                ", price=" + price +
                ", sunroof='" + sunroof + '\'' +
                ", alloyWheels='" + alloyWheels + '\'' +
                ", cruiseControl='" + cruiseControl + '\'' +
                ", electricSeats='" + electricSeats + '\'' +
                '}';
    }
}

CarApp.java

package com.app.designPatterns.builder3;

public class CarApp {

    public static void main(String[] args) {

        Car.CarBuilder priusBuilder = new Car.CarBuilder("Prius");
        Car prius = priusBuilder.price(200).sunroof(true).alloyWheels(true).cruiseControl(true).electricSeats(true).build();
        System.out.println(prius);

        Car.CarBuilder priusCBuilder = new Car.CarBuilder("Prius C");
        Car priusC = priusCBuilder.price(180).sunroof(true).alloyWheels(true).cruiseControl(false).build();
        System.out.println(priusC);

        Car.CarBuilder priusVBuilder = new Car.CarBuilder("Prius V");
        Car priusV = priusVBuilder.price(180).alloyWheels(true).build();
        System.out.println(priusV);
    }
}