Java Interfaces Code coach problem

Question

I am confused how to solve this problem. Any tips?
https://code.sololearn.com/cZ5RgbhtJWhk/?ref=app

Answer 1

To resolve the error, line 24 and 25 should be modified and made abstract.

public abstract void swim();
public abstract void play();

If this doesn't solve the problem then make sure to share the problem statement with the code so that the community could help, as many of them are not pro users.

Answer 2

I subscribed the pro version to see these problems, then I realized that some pre-written statements seem to be swapped. Then regarding this problem, the original code should contain:

dog.swim();
dog.play();
cat.swim();
cat.play();

But items were swapped, being

dog.swim();
cat.swim();
dog.play();
cat.play();

Does it proceed guys?

Furthermore, there was a curly ending bracket left for the Dog class and one for the Cat Class.