Косой квадрат

public class SkewQuadrant {
 
    public static void main(String[] args) {
        double a[] = { 0.0, 1.0 };
        double b[] = { 0.0, 5.0 };
        System.out.println("Length of diagonal = " + getLengthOfDiagonal(a, b));
        System.out.println("Center dot(x,y) = (" + getGetCenterOfDiagonal(a, b)[0] + "," + getGetCenterOfDiagonal(a, b)[1] + ")");
        System.out.println("Dot A(x,y) = (" + a[0] + "," + a[1] + ")");
        System.out.println("Dot B(x,y) = (" + getLeftDot(a, b)[0] + "," + getLeftDot(a, b)[1] + ")");
        System.out.println("Dot C(x,y) = (" + b[0] + "," + b[1] + ")");
        System.out.println("Dot D(x,y) = (" + getRightDot(a, b)[0] + "," + getRightDot(a, b)[1] + ")");
    }
 
    public static double getLengthOfDiagonal(double[] a, double[] b) {
        return Math.abs(Math.sqrt((Math.pow((b[0] - a[0]), 2.0) + Math.pow((b[1] - a[1]), 2.0))));
    }
 
    public static double[] getGetCenterOfDiagonal(double[] a, double[] b) {
        double x = a[0] + getLengthOfDiagonal(a, b) / 2 * (b[0] - a[0])
                / Math.sqrt((Math.pow((b[0] - a[0]), 2.0) + Math.pow((b[1] - a[1]), 2.0)));
        double y = a[1] + getLengthOfDiagonal(a, b) / 2 * (b[1] - a[1])
                / Math.sqrt((Math.pow((b[0] - a[0]), 2.0) + Math.pow((b[1] - a[1]), 2.0)));
        return new double[] { x, y };
    }
 
    public static double[] getLeftDot(double[] a, double[] b) {
        double center[] = getGetCenterOfDiagonal(a, b);
        double x = center[0] + (center[1] - b[1]);
        double y = center[1] - (center[0] - b[0]);
        return new double[] { x, y };
    }
 
    public static double[] getRightDot(double[] a, double[] b) {
        double center[] = getGetCenterOfDiagonal(a, b);
        double x = center[0] - (center[1] - b[1]);
        double y = center[1] + (center[0] - b[0]);
        return new double[] { x, y };
    }
}