Does it take months to learn Java?

Answer 1

It all depends how much time you take it to learn

Answer 2

If you have prior knowledge in object oriented, you will need only for a few weeks

Answer 3

If you want to become great at the language, then yes it will take months, but if you just want a basic understanding, it will take a month or two. The best advice I can give you is to take your time. Each language is complex and unique in its own way. Good luck.