why not you learn c++ instead ?? C++ is faster than Java, however its up to you
if you change your mind and want to learn C++ instead, here is a book i recomended

 

Beginning C++ Through Game Programming [Amazon]

I have an older edition of this book and it was amazing.   I recommend this book as well.  

My java book I used was head first http://www.amazon.com/Head-First-Java-Kathy-Sierra/dp/0596009208/ref=sr_1_1?s=books&ie=UTF8&qid=1360406369&sr=1-1&keywords=java+head.   I'd recommend that one too.  My goal wasn't to finished the book.   All I wanted was to read up on what I needed to know to start android and had no problems getting that background with that book.  

why not you learn c++ instead ?? C++ is faster than Java, however its up to you
if you change your mind and want to learn C++ instead, here is a book i recomended

 

Beginning C++ Through Game Programming [Amazon]

I have an older edition of this book and it was amazing.   I recommend this book as well.  

My java book I used was head first amazon.   I'd recommend that one too.  My goal wasn't to finished the book.   All I wanted was to read up on what I needed to know to start android and had no problems getting that background with that book.