Polymorphism/overriding

Question

the first code is from polymorphism lesson and the 2nd code is from overriding lesson in the java course.what are the difference between the two codes?they look so similar.

polymorphism
https://code.sololearn.com/cf6YJ67Kze8m/?ref=app

overriding
https://code.sololearn.com/cnEXHKnXc7pA/?ref=app

Answer 1

Story: A marker pen just went out of ink in class.
Task: Find replacement, or new pen.

Teacher: Mr. oyl, go to school supplies room and fetch me a new pen!

#Override
You: (In your mind) "I'll just borrow one from a nearby class"

#Conclusion (Override):
You "disobey", or totally ignore the actual method, and choose to have your own way to accomplish the task.

#Overload
You: "Sir, I can borrow one from nearby class, I can also get it from the teacher's room, it's nearer, I also have one with me here, we can just use this for now, yet, I can talk to the janitor to get one for you. What would you have me do sir?".

#Conclusion (Overload):
You improvise, provide your teacher other ways to accomplish the task, yet, you still will follow the actual method, despite you have the options. Your teacher then have more variants of how the pen can be fetched.

Answer 2

@gordie so the only way to determine whether is it a polymorphism or a overriding is by looking at the instance code?"cat c=new cat" for overriding "animal c =new cat" for polymorphism.