Java Abstract Class Explained with Example 🚀
In this video, we learn about Abstract Classes in Java with real-world examples.
👉 What is an abstract class?
👉 Why do we need constructors in abstract classes?
👉 How static methods work in abstract classes?
👉 Example from JDK: Number class (Integer, Double, Float)
An abstract class in Java can have:
✔️ Abstract methods (no body – must be implemented by subclass)
✔️ Concrete methods (with body – reusable by subclasses)
✔️ Constructors (used by subclasses for initialization)
✔️ Static methods
JDK Example:
The java.lang.Number class is abstract and is the parent of all numeric wrapper classes like Integer, Double, and Float. We cannot create objects of Number directly, but its subclasses implement the required methods.
By the end of this video, you will clearly understand:
✅ When to use abstract classes
✅ How constructors and static methods behave in abstract classes
✅ How real JDK classes (like Number) use abstraction
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