Basic Java Simple Calculations - 07. 2D Rectangle Area

import java.util.Scanner;

public class RectangleArea2D {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        double x1 = Double.parseDouble(scanner.nextLine());
        double y1 = Double.parseDouble(scanner.nextLine());
        double x2 = Double.parseDouble(scanner.nextLine());
        double y2 = Double.parseDouble(scanner.nextLine());

        double x = Math.abs(x1-x2);
        double y = Math.abs(y1-y2);

        double area = x*y;
        double perimeter = (x+y) * 2;

        System.out.println(area);
        System.out.println(perimeter);

    }
}