how to do quadratic formula in java

1public class Main {
2
3  public static void main(String[] args) {
4
5    // value a, b, and c
6    double a = 2.3, b = 4, c = 5.6;
7    double root1, root2;
8
9    // calculate the determinant (b2 - 4ac)
10    double determinant = b * b - 4 * a * c;
11
12    // check if determinant is greater than 0
13    if (determinant > 0) {
14
15      // two real and distinct roots
16      root1 = (-b + Math.sqrt(determinant)) / (2 * a);
17      root2 = (-b - Math.sqrt(determinant)) / (2 * a);
18
19      System.out.format("root1 = %.2f and root2 = %.2f", root1, root2);
20    }
21
22    // check if determinant is equal to 0
23    else if (determinant == 0) {
24
25      // two real and equal roots
26      // determinant is equal to 0
27      // so -b + 0 == -b
28      root1 = root2 = -b / (2 * a);
29      System.out.format("root1 = root2 = %.2f;", root1);
30    }
31
32    // if determinant is less than zero
33    else {
34
35      // roots are complex number and distinct
36      double real = -b / (2 * a);
37      double imaginary = Math.sqrt(-determinant) / (2 * a);
38      System.out.format("root1 = %.2f+%.2fi", real, imaginary);
39      System.out.format("\nroot2 = %.2f-%.2fi", real, imaginary);
40    }
41  }
42}