public class Prostokat extends Figura
{
	private double bok_x = 0;
	private double bok_y = 0;

	Prostokat(String kolor, double bok_x, double bok_y)
	{
		this.kolor = kolor;
		this.bok_x = bok_x;
		this.bok_y = bok_y;
	}

	public String getKsztalt()
	{
		return Prostokat.class.getName();
	}

	public double getPowierzchnia()
	{
		return this.bok_x * this.bok_y;
	}

	public double getObwod()
	{
		return 2 * this.bok_x + 2 * this.bok_y; 
	}
}