Can I instantiate an Interface?

[Jane Somerfield]

The answer is No. But I can do this

List<int> l = new List<int>();

Why?

[Hebert Coelho]

When you do new List<Integer>(){...}; you create a anonymous class. [=

http://docstore.mik.ua/orelly/java-ent/jnut/ch03_12.htm
http://mindprod.com/jgloss/anonymousclasses.html

[Mohamed Sanaulla]

Can you really compile that code?

[Mohamed Sanaulla]

Creating an anonymous inner class is nothing but implementing that particular interface and you would have to implement all the methods present in the interface.

The given code is no where close to that. Moreover the type used in the Generic declaration has to be a class/reference type.

[Rob Spoor]

 

Mohamed Sanaulla wrote:Can you really compile that code?

It won't. Even if there were a non-abstract List class with a generic type (java.util.List is an interface, java.awt.List is not generic), the <int> is still not allowed because primitive types can never be generic types.

[Jane Somerfield]

Sorry, the code does not compile. My question was can we use primitive in generics.

[Mohamed Sanaulla]

 

Jane Somerfield wrote:Sorry, the code does not compile. My question was can we use primitive in generics.

I think Rob just mentioned about this in his post and also I have mentioned it in my second post.

I was struggling to remember the "primitive" keyword though

[Winston Gutkowski]

 

Jane Somerfield wrote:My question was can we use primitive in generics.

No.

Winston