Why give error in line12 ?

Question

https://code.sololearn.com/c02Yv0x5cmzr/?ref=app

Answer 1

Fixed:

https://code.sololearn.com/cI6ihpvA9Ho6/?ref=app

Answer 2

why you make over ride

Answer 3

this implements and take method without overrid

Answer 4

even l try it by over ride still error

Answer 5

On SoloLearn you need the code to be in
public class MyProgram {
}
because SoloLearn looks for this class when running the code.

In theory, all methods in an interface are overridden but the @Override is optional. I tend to use it so my code is clearer.

Answer 6

still give error

Answer 7

You need to make your Cal and your A classes static.