Hours to complete.

I don't know the number of hours but I finished course within 6-7 months.

So i have a goal for about 4 hours during weekday, including breaks and 6 hours a day on the weekend. In order to have a measure for the time i'm spending learning Java, and to count the effort, i am learning with pomodoro. So 1 pomodoro is 25 minute studying and 5 minutes break, and at every 4 pomodoro, you have a longer break (15 -20 min). I am also having a 8 to 5 day job, and i'm trying my best to take advantage of all the free time i have, without sacrificing too much. Given the above, i am estimating that the whole course will take me about 1200 pomodoro to finish

Why are there people at Level 0 and Level 1 giving advice on how long it takes to finish?

minimum 1000 hours

I passed completely the whole course from level 1 to 40 in ~400 hours. Hovewer, i've skipped around of 200 tasks.

500-2000 hours. Depends upon many circumstances.

300-500 hours sounds about right

6 hours/day 42 hours/week 168 hours/month 3 months = 504 hours

I think something between 250~500 hours.