Classes & Methods in Java

A class is a blueprint or template for creating objects. It defines a set of properties (variables) and behaviors (methods) that are common to all objects of that type. For example, a `Car` class could define properties like `brand` and `speed`.

An object is a real-world entity that is an instance of a class. When you create an object from a class, you are creating a concrete item based on the blueprint. You can create multiple objects from a single class.

A method is a block of code within a class that performs a specific task. Methods define the behavior of an object. For example, a `Car` class might have a `startEngine()` method. Methods help in reusing code and keeping it organized.

A constructor is a special type of method that is used to initialize an object. It is called automatically when an object is created. It has the same name as the class and no return type.