public double calcPi(int steps) {
        double pi = 0.0d;
        for (int i = steps; i > 0; --i) {
            pi += Math.pow(-1, i + 1) / (2 * i - 1);
            if (i == 1) {
                pi *= 4;
                break;
            }
        }
        return pi;
    }

public class Test {

    public static class Parent {
        protected String name = "Super";
    }

    public static class Child extends Parent {
        protected String name = "child";
    }

    public static void main(String[] args) {
        Parent parent = new Parent();
        System.out.println(parent.name);
        Parent child = new Child();
        System.out.println(child.name);
    }

}