class Human {}
class Woman extends Human {} 
class Man extends Human {}

public class UpCast {
  public static void main(String[] args) {
    Human h1 = new Human(); // OK
    Human h2 = new Man();   // OK
    Human h3 = new Woman(); // OK
    System.out.println(h2);
    System.out.println(new Woman() instanceof Human);
    System.out.println(h3 instanceof Human);
  }
}