Gauthami, what you need to learn is to deliver and end to end solution. Thus learning only core java will not help .Learn J2EE,Hibernate,Spring,MYSQL.

Check this Facebook group to get details on Job openings:-

https://www.facebook.com/groups/careerengineering/

Apply to all the walk-ins and openings of fresher levels. Connect with your friend circle, seniors and relatives working in industry. Ask them if they know any job opening.

Stay Positive and Keep Learning,
Vikram
http://www.praclabs.com

Truly, it's a good decision. also improve your soft skills.