complex java

class Complex {
    private static long cnt = 0;
    private double re, img;
    public Complex(double re, double img) {
        this.re = re;
        this.img = img;
    }
    public double abs() {
        return Math.sqrt(re * re + img * img);
    }
    public void print() {
        System.out.println(re + " + " + img + "i");
        Complex.cnt++;
    }
    public Complex add(final Complex other) {
        return new Complex(re + other.re, img + other.img);
    }
    public static long getCnt() {
        return Complex.cnt;
    }
}

class ClientComplex {
    public static void main(String argv[]) {
        Complex a = new Complex(3, -2);
        Complex b = new Complex(3, 4);
        a.print();
        a.add(b).print();
        System.out.println(b.abs());
        System.out.println(Complex.getCnt());
    }
}