การเพิ่มเมธอดในคลาสพร้อมกำหนดชนิดของค่าที่คืนกลับ

class Main {  

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

        Car(String color, String model, int year) {
            this.color = color;
            this.model = model;
            this.year = year;
        }

        void turnEngineOn() {
            System.out.println("engine is on");            
        }

        // Create the calculateMPG method 
        ____ calculateMPG(int ____, int ____) {
            return ____ / ____;
        }
    }
    
    public static void main(String[] args) {
    	Car myCar = new Car("red", "camry", 2022);
        // Print out value for when calculateMPG is used 
        System.out.println(myCar.calculateMPG(____, ____));
    }
    
}