Get the SCJP study guide book by Kathy and Bert and read it. Try the mock exams and take the free exams that are available on the internet. Form you own schedule. You learning speed might vary when compared to that of others.
50 days averages to a chapter ever 5 days in the K&B book.
If you don't have a full time job and are dedicated - I'd say you shouldn't have a problem
I planned on doing a chapter a week in the K&B book, but I work full time, so unfortunately that didn't happen. I study about 1 or 2 hours a day and as much as I can on the weekends.
"...it takes all the running you can do to keep in the same place. <br />If you want to get somewhere else, you must run at least twice as fast as that!" <br />~ Through the Looking-Glass
I'm THIS CLOSE to ruling the world! Right after reading this tiny ad: