At the base of the Framework are the interfaces java.util.Collection and java.util.Map. The Collection interface represents just a group of objects, with no particular order or restriction.

With the sequenced collections proposal, all of the new methods declared in the new interfaces have default implementations. Sequenced collections would be added to the standard edition of Java.

Java collection framework provides you with the complete architecture of objects. Java frameworks group of objects includes – classes, interfaces, and algorithm. Class – Everything in Java is ...

When Java was born, the only data structure support built into the core libraries involved arrays, vectors (essentially dynamically-sized arrays), and hash tables (for key-value pairs).