For an example of encapsulation i can think of the interaction between a user and a mobile phone. The user does not need to know the internal working of the mobile phone to
If you have seen important TV machine, TV connections and TV color tube is hidden inside the TV case which is not been exposed for viewers like us and exposed only neccessary things of a TV like TV Channel keys, TV volume keys, ON/OFF switch, Cable Switch and TV remote control for viewers to use it.This means TV machine, TV connections and TV color tube is an unwanted data and not needed for viewers to see is been hidden from outside the world
So encapsulation means hiding the important features of a class which is not been needed to be exposed outside of a class and exposing only necessary things of a class. Here hidden part of a class acts like Encapsulation and exposed part of a class acts like Abstraction.