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.

Proposal for enhancing the Java programming language would define interfaces for sequenced collections, sequenced sets, and sequenced maps. Topics Spotlight: AI-ready data centers ...

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).

The collections framework was designed to meet several goals. The framework had to be high-performance. The implementations for the fundamental collections (dynamic arrays, linked lists, trees, and ...