Abstraction in Java with Real-Time Example

1. Introduction Abstraction is one of the core concepts of Object-Oriented Programming (OOP). 👉 It means hiding internal implementation details and showing only the essential features to the user. In simple terms: “What to do” is exposed, but “how it is done” is hidden. 2. Real-Time Analogy Think of an ATM Machine: You insert a card and withdraw money You don’t know how: Bank server validates PIN Balance is checked Cash is processed 👉 You only see operations, n