Java is a language with real flavour of OOPS. Thus, in order to understand OOPS concept, java should be the first destination for a computer science student. It is a statically typed language and thus loved so much by your IDE. You will get ultimate support from your IDE which will save you from a lot of pain in the initial days.
I will recommend to have a book called “Head First Java by Bert Bates and Kathy Sierra” for beginners. The book explains the concepts so well that you will feel like you are reading a storybook.