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.

Examples of generic types in Java Raw types vs. generics Why use generics? Generics are commonly used in the Java Collections Framework with java.util.List, java.util.Set, and java.util.Map.

Manipulating these data sets can be a complex and frustrating task. To ease the programmer’s job, Java introduced the Java Collections Framework collections in 1998.

Proposal for enhancing the Java programming language would define interfaces for sequenced collections, sequenced sets, and sequenced maps.