Hi Dharmender, Welcome to JavaRanch I would ask you, How much you are familiar with Java? Since you are in 1st year I would highly recommend you "Head First Java" by Kathy Sierra and Bert Bates.Go through that book first to acquire the basics.
Sachin Verma is right. If your are not familiar with Java language, SCJP study guides are not appropriate to learn Java from scratch. After reading Head First Java, I recommend you to read some chapters from "Head First Object Oriented Analysis and Design".