Rysowanie figur bez if i switch

package Rysownik;

public class Kwadrat {
    public double a;
    public String typ = "Kwadrat";

    public Kwadrat(double a) {
        this.a = a;
    }
}

public class Prostokat {
    public double a;
    public double b;
    public String typ = "Prostokat";

    public Prostokat(double a, double b) {
        this.a = a;
        this.b = b;
    }
}

public class Trojkat {
    public double a;
    public double h;
    public String typ = "Trojkat";

    public Trojkat(double a, double h) {
        this.a = a;
        this.h = h;
    }
}

public class Rysownik {
    public void Rysuj(Kwadrat kwadrat) {

        int Xposition;
        for(Xposition = 0; Xposition < kwadrat.a; Xposition++)
        {
         System.out.print("X");
        }
        for(int Yposition = 0; Yposition < kwadrat.a-1; Yposition++)
        {
            System.out.println();
            System.out.print("X");
            for(Xposition=0;Xposition < kwadrat.a-2;Xposition++)
            {
                System.out.print(".") ;
            }
            System.out.print("X");
        }
        System.out.println();
        for(Xposition = 0; Xposition < kwadrat.a; Xposition++)
        {
            System.out.print("X");
        }
    }

    public void Rysuj(Prostokat prostokat) {
        int Xposition;
        for(Xposition = 0; Xposition < prostokat.a; Xposition++)
        {
            System.out.print("X");
        }
        for(int Yposition = 0; Yposition < prostokat.b-1; Yposition++)
        {
            System.out.println();
            System.out.print("X");
            for(Xposition=0;Xposition < prostokat.a-2;Xposition++)
            {
                System.out.print(".") ;
            }
            System.out.print("X");
        }
        System.out.println();
        for(Xposition = 0; Xposition < prostokat.a; Xposition++)
        {
            System.out.print("X");
        }
    }

    public void Rysuj(Trojkat trojkat) {
        double MiddlePoint = trojkat.a / 2;
        int TempNumber;

        for (TempNumber = 0; TempNumber < Math.floor(MiddlePoint); TempNumber++)
        {
            System.out.print(" ");
        }

        System.out.print("X");
        System.out.println();
        int PrevLeftWall = (int) MiddlePoint;

        for (int LinePoision = 1; LinePoision < trojkat.h - 1; LinePoision++)
        {
            double drawDone = (double) LinePoision / (trojkat.h - 1);
            int LeftWall = (int) Math.floor(MiddlePoint - MiddlePoint * drawDone);
            int RightWall = (int) Math.ceil(MiddlePoint - (MiddlePoint * drawDone * -1));
            int HowManyX = PrevLeftWall - LeftWall;

            for (TempNumber = 0; TempNumber < LeftWall; TempNumber++)
            {
                System.out.print(" ");
            }

            TempNumber = HowManyX;
            HowManyX = 0;

            do
            {
                HowManyX++;
                TempNumber--;
                System.out.print("X");
            } while (TempNumber > 0);


            for (TempNumber = LeftWall + HowManyX; TempNumber < RightWall - HowManyX; TempNumber++)
            {
                System.out.print(".");
            }

            for (TempNumber = HowManyX; TempNumber > 0; TempNumber--)
            {
                System.out.print("X");
            }

            System.out.println();
            PrevLeftWall = LeftWall;
        }
        for (TempNumber = 0; TempNumber < trojkat.a; TempNumber++)
        {
            System.out.print("X");
        }
        System.out.println();
    }
}


public class JavaApplication1 {
        public static void main(String[] args) {
            Rysownik rysownik = new Rysownik();

            Trojkat TrojkatOB = new Trojkat(10, 10);
            Kwadrat KwadratOB = new Kwadrat(10);
            Prostokat ProstokatOB = new Prostokat(10,5);

            rysownik.Rysuj(ProstokatOB);
        }
}