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Java Collections Framework Collections Practice Programs Comparable vs Comparator Generics Iterator ArrayList LinkedList Stack Vector HashMap Hashtable LinkedHashMap TreeMap ArrayDeque Deque Double-Ended Queue PriorityQueue HashSet LinkedHashSet TreeSet

Design Patterns

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Java Topics

Hub Java Collections Framework Collections Practice Programs Comparable vs Comparator Generics Iterator ArrayList LinkedList Stack Vector HashMap Hashtable LinkedHashMap TreeMap ArrayDeque Deque Double-Ended Queue PriorityQueue HashSet LinkedHashSet TreeSet Adapter Pattern Builder Pattern Factory Pattern MVC Pattern Observer Pattern Singleton Pattern Dynamic Programming Graph Hashing Heap Linked List DSA Queue DSA Recursion Searching Algorithms Sorting Algorithms Stack DSA Time Complexity Trees Exception Handling Best Practices Custom Exception Exception Hierarchy finally Block Exception Handling throw aur throws try-catch Buffered Streams Byte Streams Character Streams Deserialization File Class Java NIO New I/O Serialization Arrays in Java Array Operations Array Practice Programs Array Interview Questions Jagged Array Multi-Dimensional Arrays One Dimensional Array break aur continue do-while Loop for Loop if-else Statements Nested Loops switch-case Statement while Loop Java Compilation Process Java ki Features Pehla Java Program History of Java Java Editions Java Program Structure JDK, JRE aur JVM Java Kya Hai?Immutable Strings String Class in Java String Interview Questions String Methods String Practice Programs StringBuffer StringBuilder Comments in Java Data Types in Java Identifiers in Java Input & Output in Java Java Keywords Operators in Java Type Casting in Java Variables in Java Java Coding Interview Questions Collections Interview Questions Core Java Interview Questions JDBC Interview Questions Multithreading Interview Questions OOPs Interview Questions Spring Framework Interview Questions Java 8 Date/Time API Default aur Static Methods in Interface Functional Interface Lambda Expression Method Reference Optional Class Stream API Batch Processing CallableStatement JDBC Architecture JDBC — Java Database Connectivity JDBC Practice Projects MySQL Connection PreparedStatement ResultSet Statement Interface Transaction Management Creating Threads Daemon Thread Executor Framework Inter-Thread Communication Multithreading Practice Programs Runnable Interface Synchronization Thread Class Multithreading Introduction Thread Life Cycle Thread Priority Java Cheat Sheet Important Formulas & Key Concepts Important Java Programs Java Quick Revision Abstract Class Abstraction Anonymous Class Class and Object Constructor Encapsulation Inheritance Inner Class Interface Method Overloading Method Overriding Object Class Object Cloning Object-Oriented Programming OOP Polymorphism static Keyword super Keyword this Keyword Wrapper Classes Array Practice Programs Basic Java Practice Programs Collection Practice Programs JDBC Practice Programs Multithreading Practice Programs OOPs Practice Programs Placement Coding Questions String Practice Programs Banking System Chat Application E-Commerce Backend — Spring Boot REST API Employee Management System Library Management System Spring Boot Fullstack Project Student Management System Cookies in Servlet Expression Language EL GenericServlet HttpServlet JavaServer Pages JSP JSP Tags MVC Architecture HttpServletRequest & HttpServletResponse Servlet Introduction Servlet Life Cycle Session Tracking Dependency Injection Spring Beans Spring Core Spring Framework API Gateway Spring Cloud Config Server Docker Deployment Eureka Server — Service Discovery Spring Boot CRUD Application Exception Handling in Spring Boot JWT Authentication REST API in Spring Boot Spring Security Spring Boot Spring Data JPA Validation in Spring Boot

Home/Coding/Java Master Course/Design Patterns

Factory Pattern

Last Updated : 26 May, 2026

title: Factory Design Pattern

Design Patterns37 words3 headingsExamples included

title: Factory Design Pattern description: Object creation logic encapsulate karna

Object banane ki responsibility ek factory class ko do.

Simple Factory

interface Shape { void draw(); } class Circle implements Shape { public void draw() { System.out.println("Circle"); } } class Rectangle implements Shape { public void draw() { System.out.println("Rectangle"); } } class Triangle implements Shape { public void draw() { System.out.println("Triangle"); } } class ShapeFactory { public static Shape createShape(String type) { return switch (type.toLowerCase()) { case "circle" -> new Circle(); case "rectangle" -> new Rectangle(); case "triangle" -> new Triangle(); default -> throw new IllegalArgumentException("Unknown shape: " + type); }; } } // Use Shape s1 = ShapeFactory.createShape("circle"); s1.draw();

Factory Method Pattern

java exampleWoHoTech

abstract class AnimalFactory {
    abstract Animal createAnimal(); // Factory method
    void makeSound() { createAnimal().speak(); }
}

class DogFactory extends AnimalFactory {
    @Override
    Animal createAnimal() { return new Dog(); }
}

class CatFactory extends AnimalFactory {
    @Override
    Animal createAnimal() { return new Cat(); }
}

Use Cases

Calendar.getInstance()
NumberFormat.getCurrencyInstance()
JDBC DriverManager
Spring bean creation

Exam Focus

Revise definitions, diagrams, examples, and short-answer points for Factory Pattern.

Interview Use

Prepare one clear explanation, one practical example, and one common mistake for this Java topic.

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java, java programming, core java, java master course, java notes, master, course, design

Related Java Topics

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Design PatternsAdapter Patterntitle: Adapter Design Pattern Design PatternsBuilder Patterntitle: Builder Design Pattern Design PatternsMVC Patterntitle: MVC Design Pattern Design PatternsObserver Patterntitle: Observer Design Pattern Design PatternsSingleton Patterntitle: Singleton Design Pattern Collections FrameworkJava Collections Frameworktitle: Collections Framework Overview

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