Generics in Java allow for compile-time type checking, which reduces the chance of ClassCastExceptions, which are especially common in collections. The Java Collection Framework was considerably changed to support generics, boosting type safety. Generic methods and classes now allow explicit type parameterization using angle brackets (< >).
Type-safe programming in Java is made possible by generics, which improve code reliability and maintainability by enabling classes and methods to work on objects of specified types. They also facilitate code reuse by making it easier to create generic data structures and algorithms that can be applied to a variety of data types.
Generic classes are defined similarly to regular classes, but include a list of type parameters in angle brackets <...> after the class name. The type parameters can then be used to declare variables and define parameter types for methods throughout the class definition.
In Java, generics cannot use primitive types like int or double directly; instead, they must use the same wrapper classes, such as Integer or Double.
Generics in Java enable the imposition of limits on type parameters through bounded wildcards, assuring compatibility with specified types or subtypes. These limitations improve code clarity and avoid undesired behavior, resulting in robust and error-free implementations.