Answer 1

You mostly learn programming by doing.

Answer 2

Head first Java
Java The Complete Reference
This two books are the best for the beginners and the professionals to learn Java.

If you want to gain more knowledge then scroll the comment sections of Java coarse of Sololearn and you will find a more efficient way to learn Java lamguage in depth. 😊 🙂

Answer 3

NO brother You Can Not do that.
Even YOu Can not Do This With Any kind of languages because watching is not enough u need to practice it.
Hope This Cleared Your Doubt.

Answer 4

Certainly not.
Practice make perfect