- Generics - Home
- Generics - Overview
- Generics - Environment Setup
- Examples - Generic Classes
- Generics - Generic Classes
- Type Parameter Naming Conventions
- Generics - Type inference
- Generics - Generic Methods
- Generics - Multiple Type Parameters
- Generics - Parameterized Types
- Generics - Raw Types
- Examples - Bounded Type Parameters
- Bounded Type Parameters
- Generics - Multiple Bounds
- Examples - Collections
- Generics - Generic List
- Generics - Generic Set
- Generics - Generic Map
- Examples - Wild Cards
- Upper Bounded Wildcards
- Generics - Unbounded Wildcards
- Lower Bounded Wildcards
- Generics - Guidelines for Wildcards
- Type Erasure
- Generics - Generic Types Erasure
- Generics - Bound Types Erasure
- Unbounded Types Erasure
- Generics - Generic Methods Erasure
- Restrictions on Generics
- Generics - No Primitive Types
- Generics - No Instance
- Generics - No Static field
- Generics - No Cast
- Generics - No instanceOf
- Generics - No Array
- Generics - No Exception
- Generics - No Overload
- Generics Useful Resources
- Generics - Quick Guide
- Generics - Useful Resources
- Generics - Discussion
Java Generics - Overview
It would be nice if we could write a single sort method that could sort the elements in an Integer array, a String array, or an array of any type that supports ordering.
Java Generic methods and generic classes enable programmers to specify, with a single method declaration, a set of related methods, or with a single class declaration, a set of related types, respectively.
Generics also provide compile-time type safety that allows programmers to catch invalid types at compile time.
Using Java Generic concept, we might write a generic method for sorting an array of objects, then invoke the generic method with Integer arrays, Double arrays, String arrays and so on, to sort the array elements.
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