Prostokąt

public class Prostokat {
    Punkt lg;
    Punkt pd;

    Prostokat() {
        this.lg = new Punkt(0, 1);
        this.pd = new Punkt(1, 0);
    }

    Prostokat(Punkt p1, Punkt p2) {
        this.lg = p1;
        this.pd = p2;
    }

    Prostokat(int x1, int y1, int x2, int y2) {
        this.lg = new Punkt(x1, y1);
        this.pd = new Punkt(x2, y2);
    }

    Prostokat(Prostokat pr) {
        this.lg = new Punkt(pr.lg);
        this.pd = new Punkt(pr.pd);
    }

    public Punkt getLg() {
        return this.lg;
    }

    public void setLg(Punkt lg) {
        this.lg = lg;
    }

    public Punkt getPd() {
        return this.pd;
    }

    public void setPd(Punkt pd) {
        this.pd = pd;
    }

    int pole() {
        int a = Math.abs(this.lg.pobierzX() - this.pd.pobierzX());
        int b = Math.abs(this.lg.pobierzY() - this.pd.pobierzY());
        return a * b;
    }

    int obwod() {
        int a = Math.abs(this.lg.pobierzX() - this.pd.pobierzX());
        int b = Math.abs(this.lg.pobierzY() - this.pd.pobierzY());
        return 2 * a + 2 * b;
    }

    public String toString() {
        return "(" + this.lg.pobierzX() + ", " + this.lg.pobierzY() + "), " + "(" + this.pd.pobierzX() + ", " + this.pd.pobierzY() + ")";
    }
}