Example 2: Zeros of a Polynomial with Complex Coefficients

import com.imsl.math.*;

public class ZeroPolynomialEx2 {

    public static void main(String args[]) throws
            ZeroPolynomial.DidNotConvergeException {
        // Find zeros of z^3-(3+6i)*z^2+(-8+12i)*z+10
        Complex coef[] = {
            new Complex(10),
            new Complex(-8, 12),
            new Complex(-3, -6),
            new Complex(1)
        };

        ZeroPolynomial zp = new ZeroPolynomial();
        Complex root[] = zp.computeRoots(coef);

        for (int k = 0; k < root.length; k++) {
            System.out.println("root = " + root[k]);
            System.out.println("    radius = " + zp.getRadius(k));
            System.out.println("    status = " + zp.getStatus(k));
        }
    }
}

Output

root = 1.0+1.0i
    radius = 6.105673569140261E-14
    status = false
root = 1.0000000000000002+2.0000000000000004i
    radius = 1.9846776908049295E-13
    status = false
root = 0.9999999999999992+2.999999999999999i
    radius = 1.5275632034267045E-13
    status = false