Tutorial by Examples

Generics was introduced in Java in its version (1.)5. These are erased during compilation, so runtime reflection is not possible for them. Generics generate new types parametrized by other types. For example we do not have to create new classes in order to use type safe collection of Strings and Num...

Generic type parameters are commonly defined at the class or interface level, but methods and (rarely) constructors also support declaring type parameters bound to the scope of a single method call. class Utility // no generics at the class level { @SafeVarargs public static <T> T ...