(Ask)For java programmers

Question

Hi! I would like to ask what is wrong with this code also, I just want to know more about abstraction on what it did,really appreciate the answer.thank you!
https://code.sololearn.com/cx9BG0zERnvY/?ref=app

Answer 1

An abstract class is needed to place common methods in one place, so those who inherit from it implement all methods of the abstract class. An abstract class is a workpiece / form / base to other classes

Answer 2

Your brackets are not positioned correctly. After the main methods, you need to close the AbstractAreas class

Answer 3

Do not worry about the abstract class. There are also interfaces that are completely abstract classes. If you can write different methods in a normal abstract class, this is not possible in the interface. The interface uses only abstract methods. However, the interface allows you to perform multiple inheritance.
I myself once refused to study Java because of a misunderstanding of the abstract class and returned a week later)

Answer 4

thank you! don't know what abstraction actually did to the code so just wanted to ask too about abstraction

Answer 5

tnx I think I get it for now😊

Answer 6

this also can help you.

https://www.tutorialspoint.com/java/java_overview.htm