Each programming language has a set of the original Java version contains several collections: Vector, Stack, HashTable and Array.
With the widespread use of the collection, Java1.2 proposed to include all collection interface, and collections framework algorithm. And concurrent use of generic collection classes in ensuring the thread-safe, Java has experienced for a long time. It also includes Java and contracting, the blocking interface as well as their implementation.
Some of the benefits of the frame set as follows:
(1) the use of core collections to reduce development costs, rather than to achieve our own collection classes.
(2) With the use of a set of framework classes through rigorous testing, code quality will be improved.
(3) by using the supplied collections JDK, code maintenance costs can be reduced.
(4) reusability and maneuverability.