which is the best site to learn java after completion of java course in Sololearn.?

Answer 1

https://www.edx.org/, https://www.hackerrank.com/. In the first there are many free courses, and the second there are many exercises to practice what you've learned.

Answer 2

https://www.sololearn.com/post/43999/?ref=app

Answer 3

I hope you find something useful!👍😉
HappyLearning!;)
https://www.sololearn.com/post/19792/?ref=app

https://www.sololearn.com/post/18830/?ref=app
https://www.sololearn.com/post/16941/?ref=app
https://www.sololearn.com/post/14889/?ref=app