title: Abstract class with all methods abstract - Practical Example
body: <p>I am asking a very basic question and it may be marked duplicate (I could not find the answer though):</p>
  
  <blockquote>
    <p>Is there any practical example of an Abstract Class with all the
    methods declared as Abstract?</p>
  </blockquote>
  
  <p>In most cases and as mentioned in Java Tutorial also, class with all methods abstract shall be an interface. </p>
  
  <p>But since abstract class and interface are two different concepts, I am looking for an example compelling to have "complete abstract class"</p>