03_Classes_Objects

Classes & Objects

Now that you have a solid foundation in Java, let's dive into Object-Oriented Programming (OOP). In this section, you'll learn how to create classes and objects, and how to use methods and static variables.

Topics Covered:

1. Classes & Objects - Defining and using classes and objects.
2. Constructors - Default and parameterized constructors.
3. Methods - Creating methods and method overloading.
4. Static Keyword - Using static variables and static blocks.

Example Programs:

• Box.java - Create a class to calculate the volume of a box.
• UseStatic.java - Demonstrate the use of static methods, variables, and blocks.
• TestReference.java - Illustrate passing objects as parameters.

Exercises:

1. Create a class Box and calculate its volume.
2. Create a class Triangle and calculate its area using a parameterized constructor.
3. Write a program to demonstrate static variables and methods.

Once you grasp OOP basics, move on to Inheritance & Polymorphism.

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Files

• Box.java: Demonstrates the creation and use of a simple class.
• TestReference.java: Tests object references and their behavior.
• UseStatic.java: Demonstrates the use of static members.