View difference between Paste ID: 4rKYmmng and wU17itfZ

 public class Test {
 
     public static void main(String[] args) {
         C obj = new D(); // the object is actually a D
         A a = obj.method(); // actually calls the method returning a B
         System.out.println(a.getClass()); // its a B
     }
 }
 
 class A {
 }
 
 class B extends A {
 }
 // B is sub-class
 // B is 'narrower'
 
 class C {
 
     A method() {
         return new A();
     }
 }
 
 class D extends C {
-//Overriding getFoo() in father class A
+//Overriding method() in father class A
 
     B method() {
         return new B();
     }
 }