Java Programming Interviews Exposed. Noel Markham

This book has been written for a Java developer with some experience: You know the language and have been using it for some time, but some of the topics in the chapters may be unfamiliar or completely new to you.
If you have never used Java at all, this book may be helpful, especially the chapters in Part II, although you should probably read this in tandem with some more dedicated introductory material.
You may even find this book of some use if you sit on the other side of the interviewer’s table: Please use it to take inspiration for some questions to ask in an interview.