Duration

Question

how many days or months can it take for a student to learn the major basis of Java

Answer 1

You can learn the Major Basis within a day. But be sure you will be flooded with not working code afterwards.
1. Write code
2. get error
3. google the problem
4. understand and fix
5. get another error
6. repeat.
This might take weeks and months until you are familiar with the most situations if you are a complete beginner.