How can i work with java

Question

I want to learn java but I don't know where have to start

Answer 1

Some Java course:
https://www.sololearn.com/Course/Java/

Some Java challenges:
https://www.sololearn.com/Play/Java/

Some Java book (pdf):
https://www.sololearn.com/discuss/510275/?ref=app

Answer 2

I learned this but I don't get confidence