CLASSES AND OBJECT SAMPLE USES A MODULE OF STUDENT.pptx

MODULE 1 FOR OOP

1. Java classes and object

2. Introduction Java is an object-oriented programming language. Classes and objects are fundamental concepts in Java.

3. What is a Class? A class is a blueprint for creating objects . It defines a datatype by bundling data and methods that operate on the data into a single unit.

4. What is an Object ? An object is an instance of a class. It has state (fields) and behavior (methods).

5. Key Concepts Encapsulation: Bundling data and methods within a class and restricting access using access modifiers (private, public, etc .). Inheritance: Mechanism where one class can inherit fields and methods from another class . Polymorphism : Ability to present the same interface for different underlying forms (method overloading and overriding ). Abstraction : Hiding complex implementation details and showing only the necessary features of an object.

6. Access Modifiers public: Accessible from anywhere . private : Accessible only within the class . protected : Accessible within the same package and subclasses . default (no modifier): Accessible within the same package.

7. Conclusion Classes and objects are core components of Java's object-oriented programming. Mastering these concepts is crucial for effective Java programming.