Вопрос про переменные

public class Solution {

    public static void main(String[] args) throws IOException {
        BufferedReader bis = new BufferedReader(new InputStreamReader(System.in));
        double weight = Double.parseDouble(bis.readLine());
        double height = Double.parseDouble(bis.readLine());

        Body.calculateMassIndex(weight, height);
    }

    public static class Body {
        public static void calculateMassIndex(double weight, double height) {
            // напишите тут ваш код
        }
    }
}