class FixedTriangle {
    static float height = 3.0f;  // staticフィールド
    static float bottomSide = 4.0f;  // staticフィールド

    static float weight(float density) { // staticメソッド
        float weight;
        weight = 0.5f * height * bottomSide * density;
        return weight;
    }
}

class OutputWeight {
    public static void main(String args[]) {
        float d0 = 2.5f; 
        float d1 = 3.5f;
        System.out.println("Weight(d0) = " + FixedTriangle.weight(d0));
        System.out.println("Weight(d1) = " + FixedTriangle.weight(d1));
    }
}