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https://github.com/rameshmf/java-generics-guide

Guide to Java Generics
https://github.com/rameshmf/java-generics-guide

generic generic-methods java-generics java-generics-guide java-generics-wildcards

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Guide to Java Generics

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Generics were added in Java 5 to provide compile-time type checking and removing the risk of ClassCastException that was common while working with collection classes.





Java Generics Guide


Java Generics - Generics Basics


Java Generics - Benefits of Generics


Java Generics - Generic Types


Java Generics - Generic Methods in Java


Java Generics - Bounded Type Parameters


Java Generics - Wildcards


Java Generics Examples



Java Generic Methods Examples

Java Generic Interface Examples

Java Generic Class Examples

Java Generics Multiple Type Parameters Example


Java Generics Wildcards Example

Java Generics Upper Bounded Wildcards Example

Java Generics Lower Bounded Wildcards Example

SINCE Java 5, generics have been a part of the language. Before generics, you had to cast every object you read from a collection. If someone accidentally inserted an object of the wrong type, casts could fail at runtime. With generics, you tell the compiler what types of objects are permitted in each collection. The compiler inserts casts for you automatically and tells you at compile time if you try to insert an object of the wrong type. This results in programs that are both safer and clearer, but these benefits, which are not limited to collections, come at a price. This chapter tells you how to maximize the benefits and minimize the complications.