Collection framework in Java provides a set of readily usable efficient implementations for commonly used data structures and algorithms. A basic understanding of the data constructs like arrays, String, linked list, stack, queue and trees, and concepts like hashing, will help you understand collections better. Collections are often used along with the Generics feature to provide reusable and type safe implementations for these data structures and algorithms.

Here we will discuss the basic and important object oriented concepts and how they are implemented and used in Java. This book assumes you have completed reading the beginning java book.

This note book contains notes on multithreading concepts such synchronization, deadlock, producer consumer problem etc. The book also explores the new concurrency package features and also provides a best practice summary.

This book assumes that you are familiar with the topics discussed in the Java 101 book.