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package coordinatesystem;

import javax.swing.JOptionPane;

public class CoordinateSystem {

private static double x;
private static double y;

public static void move() {
    double step = 0.0;
    String input1 = JOptionPane.showInputDialog("Enter number for X:");
    if (input1 != null) {
        x = Double.parseDouble(input1);
    } else {
        input1 = JOptionPane.showInputDialog(null, "Enter valid number for x:");
    }
    String input = JOptionPane.showInputDialog("Enter number for Y:");

    if (input != null) {
    y = Double.parseDouble(input);
     
    } else {
        input = JOptionPane.showInputDialog(null, "Enter valid number for y:");
    }
    String input2 = JOptionPane.showInputDialog("Enter number for the step:");
     if (input2 != null) {
        step = Double.parseDouble(input2);
    } else {
        input = JOptionPane.showInputDialog(null, "Enter valid number for step:");
    }
    x = ((x + step - step + 3 * step) * (-1) + step - step + step - step) * (-1) + step - step + step - step;
    y = ((y - step - step + step) * (-1) * (-1));
    JOptionPane.showMessageDialog(null, "Entered numbers: \n" + "X: " + input1 + "; Y: " + input + "; Step: " + input2 + "\nX = " + x + "Y= " + y);
}

public static void main(String[] args) {
    move();
}

}