Cramer's Rule With If statements

/*
 * Tony Silvestri
 * 9/26/2016
 * CSC-111 D01
 * Example Problem
 * Calculates Cramer's Formula Version 3 With Variables and Scanners
 * silvestri@stcc.edu
 *
 * Use this site to check:
 * http://www.wolframalpha.com/widgets/view.jsp?id=b42a80c01d9b3bb5bb385d4fba81a0c5
*/

import java.util.Scanner;

public class Cramer {
    public static void main(String args[]) {
        final String TITLE = "Cramer's Rule Calculator V3.0";
        System.out.println("Welcome to " + TITLE);

        double a, b, c, d, e, f;


        // ax + by = e
        // cx + dy = f
        // Enter 5 5 10 10 10 21

        Scanner input = new Scanner(System.in);
        System.out.print("Enter a: ");
        a = input.nextDouble();
        System.out.print("Enter b: ");
        b = input.nextDouble();
        System.out.print("Enter c: ");
        c = input.nextDouble();
        System.out.print("Enter d: ");
        d = input.nextDouble();
        System.out.print("Enter e: ");
        e = input.nextDouble();
        System.out.print("Enter f: ");
        f = input.nextDouble();
        input.close();
        System.out.println();

        double denom = a * d - b * c;

//      if (cond)
//          true_code;
//      else
//          false_code;

        if (denom == 0) {
            System.out.println("Bad Input Values.  Cannot Calculate");
        }
        else {
            double x, y;
            x = (e * d - b * f) / denom;
            y = (a * f - e * c) / denom;

            double xDisp = (int) (x * 1000.0 + 0.5) / 1000.0;
            double yDisp = (int) (y * 1000.0 + 0.5) / 1000.0;

            System.out.println("X = " + xDisp);
            System.out.println("Y = " + yDisp);
        }

        System.out.println("Thank you for using " + TITLE);
    }

}