= Generics in Java
{wiki}
<Generics in Java> parameterize classes, interfaces and methods by reference types so reusable code can retain compile-time type checks. For example, `List<String>` describes a list whose elements are strings, and retrieving one has static type `String`. <Java> generic types are generally invariant: `List<Integer>` is not a subtype of `List<Number>`. Wildcards express related producer or consumer views. <Type erasure> means a parameterized class usually has one shared runtime class rather than a fresh class for each type argument. Primitive values use wrapper types in ordinary generic collections.https://docs.oracle.com/javase/tutorial/java/generics/[Oracle Java tutorial, Generics]{ref}
// Target: computer-science.bigb
Back to article page
