A Guide to Understand Java Generics with Examples
- Description
- Curriculum
- FAQ
- Reviews
Java Generics
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. This reference will take you through simple and practical methods using Java Generics.
The Java Generics programming is introduced in J2SE 5 to deal with type-safe objects. It makes the code stable by detecting the bugs at compile time.
Before generics, we can store any type of objects in the collection, i.e., non-generic. Now generics force the java programmer to store a specific type of objects.
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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Java Generics Overview -
3
Example to Understand the power of generics
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4
Arrays vs Collection Introduction
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Arrays vs Collection vs Generics Example
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Why we need generics
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Generic Class Syntax Introduction
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Generic Class Example Part1
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Generic Class Example Part2
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10
Generics Naming Conventions
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Generic Example With K Type and V Type
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Type Inference in Java with Generics
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Generic Method Introduction
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Generic Method With Void Example
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Generic Method With Return Example
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Raw Type Generic Example
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Upper Bound Generic Introduction
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Upper Bound Generic Example
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Multiple UpperBound Example
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Upper Bound Wildcard Introduction
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Upper Bound Wildcard Example1
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Upper Bound Wildcard Example2
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Upper Bound Restriction
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Lower Bound Example Introduction
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Lower Bound Example
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UnBounded Wildcard Example
