public Cylinder(double hight, double rad, double dia){ // первый конструктор
        this.hight = hight;
        this.setName("Цилиндр");
        this.rad = rad;
        this.diag = dia;
        this.area_Body_rot = area_Body_rot;
        this.area = 2*Math.PI*rad*(rad+hight);
        this.volume = Math.PI*rad*rad*hight;
    }