Hey all.

Say I have parent class Bicycle (this is in Java if you care) and it has children classes RoadBike and MountainBike.

Say I did this...

//=====================================================
public class TestBikes {
public static void main(String[] args){

Bicycle bike01, bike02, bike03;

bike01 = new Bicycle(20, 10, 1);
bike02 = new MountainBike(20, 10, 5, "Dual");
bike03 = new RoadBike(40, 20, 8, 23);

bike01.printDescription();
bike02.printDescription();
bike03.printDescription();

}
}
//=====================================================

...How is that any different than just making bike01, bike02, and bike03 their own respective types (instead of all Bicycle) and calling each unique object's printDescription() method?