import javax.swing.*;
public class PunktTest{
public void main(String[] args) {
        double x = Double.parseDouble(JOptionPane.showInputDialog(null,"a"));
        double y = Double.parseDouble(JOptionPane.showInputDialog(null,"a"));
        Punkt p = new Punkt(x, y);
        double a = Double.parseDouble(JOptionPane.showInputDialog(null,"a"));
        double b = Double.parseDouble(JOptionPane.showInputDialog(null,"a"));
        JOptionPane.showMessageDialog(null, "Przesuniecie" + przesunięcie(a,b));
    }
}