How can we learn Java quickly?

Answer 1

Java is a too complex language, you shouldn't learn it quickly, it takes to long to learn. You may learn python3 if you really wanna learn fast! Python3 is complete and easy language.
Java uses jvm, so if you want only to use java virtual machine because of the speed or compatibility, you should learn kotlin. Kotlin is a language that is java, but you write few lines of code. SoloLearn will launch in a few months a kotlin course, but you can learn on internet.
Java can be learned quickly if you are studying at sololearn, it is practical, not theoretical, so you learn very quick.
If you really want java, learn it on many different websites a lot of times.
Daniel Rapoport

Answer 2

By practicing for hours daily! Dear you have got to show your efforts to Java in order to learn it.