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In Java, a class is a fundamental building block of object-oriented programming. It serves as a blueprint or template for creating objects, which are instances of the class. A class defines the data and behavior that the objects created from it will have.
Key Principles
A class in Java can contain:
Data Members: Variables that hold the state of the class and its objects.
Methods: Functions that define the behavior of the class and its objects.
Constructors: Special methods used to initialize new objects.
Nested Classes: Classes defined within another class.
Interfaces: Contracts that the class can implement.
Class Declaration
To declare a class in Java, you use the class keyword followed by the class name. The class body is enclosed in curly braces {}. Here is the general syntax:
Classes and Objects in Java - GeeksforGeeks
Nov 17, 2025 · In Java, classes and objects form the foundation of Object-Oriented Programming (OOP). They help model real-world entities and organize code in a structured way. A class is a blueprint used …
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Java is an object-oriented programming language. Everything in Java is associated with classes and objects, along with its attributes and methods. For example: in real life, a car is an object. The car has …
Code sample
// Create a class named "Main" with a variable xpublic class Main { int x = 5;}What is Class in Java with Examples - Java Guides
A class encapsulates data for the object and methods to manipulate that data. It serves as the fundamental building block in object-oriented programming (OOP) …
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