generics Archives - Manish Sanger

20 Mar 2018

Type Erasure – Java Generics

What is type Erasure? Generics in Java provide type checking at compile time and it has nothing to do at runtime. Java compiler uses Type Erasure feature to remove all generics type checking code (replace it with bound or Object if the type parameters are unbounded) in bytecode, insert type casting if necessary and generate bridge methods to preserve polymorphism in extended generic types. Here is an example of generic a class: class TypeErasureExample {

Java Generics

By manishsanger

Generics are a feature of generic programming which was introduced in Java 5. This allows a type or method to work with various object types while providing compile-time type safety. For example, collection framework supports generics. We can use Hashset, ArrayList, HashMap etc. to store various type of objects, and while retrieving the data we don't need to type cast. In Java 5, java rewrote the collection framework to incorporate the generics. Here is an