/*
* Java is a true OO language.  Its classes do "dynamic function binding"
* which means that the function used is determined by the 
* object type at the time it was created, not by what it
* it is being viewed as.
*
* @author gtowell
* created: Aug 6, 2021
 */
public class FuncBind {
    private class A {
        public String comment() {
            return "I am from A";
        }
    }

    private class B extends A {
        @Override
        public String comment() {
            return "I am from B";
        }
    }

    public void doTest() {
        B bb = new B();
        A aa = (A) bb;
        System.out.println("B2: " + bb.comment());
        System.out.println("A2: " + aa.comment());
        A a3 = new A();
        System.out.println("A2: " + a3.comment());

    }
    public static void main(String[] args) {
        new FuncBind().doTest();
    }
}