What is abstraction?

Freedom from representational qualities in art

Or

the quality of dealing with ideas rather than events

Objects in an OOP language provide an abstraction that hides the internal implementation details. Similar to the coffee machine in your kitchen, you just need to know which methods of the object are available to call and which input parameters are needed to trigger a specific operation. But you don't need to understand how this method is implemented and which kinds of actions it has to perform to create the expected result.

Let's implement the coffee machine example in Java. You do the same in any other object-oriented programming language. The syntax might be a little bit different, but the general concept is the same.

Explanation:

Objects in an OOP language provide an abstraction that hides the internal implementation details. Similar to the coffee machine in your kitchen, you just need to know which methods of the object are available to call and which input parameters are needed to trigger a specific operation. But you don't need to understand how this method is implemented and which kinds of actions it has to perform to create the expected result.

Let's implement the coffee machine example in Java. You do the same in any other object-oriented programming language. The syntax might be a little bit different, but the general concept is the same.