How list methods works in java [closed]

Answer 1

java.util.ArrayList, java.util.LinkedList, java.util.Vector are concrete implementation class of List interface. This classes contains all method implementation. You can use like -

List<String> list = new ArrayList<String>();

Answer 2

Java provides 3 concrete classes which implement the list interface
Vector
ArrayList
LinkedList

Answer 3

The only objects of type List you will be using will be types which actually implement List, like ArrayList, LinkedList etc. They will provide the implementations.

You cannot instantiate a class which has unimplemented abstract methods from super classes or interfaces.

Answer 4

"I have a doubt that how the methods of List interface work if they dont have any implementation inside the interface" -(!!!!!!) It will use the implementation of any class instance which is implemented this interface. So depends on the implementation in different class instance.

Are you expecting any kind of detailed example for this?