What are some apps/online application that are like Learn Java?

Question

(Im aware Learn Java is a part of sololearn and dont say sololearn please) Looking for something that mixes learning with fun or learning with quizzes/programming challenges oh and free to use and preferably no partially free thing like codeacademy

Answer 1

you can aide which is another good application for developing java and android codes and you can learn a lot.
it also has an offline compiler.