Example 1: Zeros of a Polynomial

import com.imsl.math.*;

public class ZeroPolynomialEx1 {
    public static void main(String args[]) throws
    ZeroPolynomial.DidNotConvergeException {
        double coef[] = {-2, 4, -3, 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 = 0.9999999999999999-0.9999999999999997i
    radius = 1.9197212602501468E-14
    status = false
root = 1.0000000000000004+1.0000000000000002i
    radius = 1.9618522761623435E-14
    status = false
root = 1.0000000000000002-3.3087224502121107E-24i
    radius = 2.5512925105887074E-14
    status = false