How to create an object of an abstract class and interface

abstract-class, interface, java

Solution

You can not instantiate an abstract class or an interface - you can instantiate one of their subclasses/implementers.

Examples of such a thing are typical in the use of Java Collections.

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

You are using the interface type `List<T>` as the type, but the instance itself is an `ArrayList<T>`.

Problem

Original source