Java Roadmap
|
|-- Fundamentals
|   |-- Basics of Programming
|   |   |-- Introduction to Java
|   |   |-- Java Development Kit (JDK) and Java Runtime Environment (JRE)
|   |   |-- Setting Up Development Environment (IDE: IntelliJ IDEA, Eclipse, etc.)
|   |
|   |-- Syntax and Structure
|   |   |-- Basic Syntax
|   |   |-- Variables and Data Types
|   |   |-- Operators and Expressions
|
|-- Control Structures
|   |-- Conditional Statements
|   |   |-- If-Else Statements
|   |   |-- Switch Case
|   |
|   |-- Loops
|   |   |-- For Loop
|   |   |-- While Loop
|   |   |-- Do-While Loop
|   |
|   |-- Exception Handling
|   |   |-- Try-Catch Block
|   |   |-- Finally Block
|   |   |-- Throw and Throws Keywords
|
|-- Object-Oriented Programming (OOP)
|   |-- Basics of OOP
|   |   |-- Classes and Objects
|   |   |-- Methods and Constructors
|   |
|   |-- Inheritance
|   |   |-- Single and Multiple Inheritance
|   |   |-- Method Overriding
|   |   |-- Super Keyword
|   |
|   |-- Polymorphism
|   |   |-- Method Overloading
|   |   |-- Runtime Polymorphism
|   |   |-- Dynamic Method Dispatch
|   |
|   |-- Encapsulation
|   |   |-- Access Modifiers (Public, Private, Protected)
|   |   |-- Getters and Setters
|   |   |-- Data Hiding
|   |
|   |-- Abstraction
|   |   |-- Abstract Classes
|   |   |-- Interfaces
|
|-- Advanced Java
|   |-- Collections Framework
|   |   |-- List (ArrayList, LinkedList)
|   |   |-- Set (HashSet, TreeSet)
|   |   |-- Map (HashMap, TreeMap)
|   |   |-- Queue (PriorityQueue, LinkedList)
|   |
|   |-- Concurrency
|   |   |-- Multithreading (Creating Threads, Thread Lifecycle)
|   |   |-- Synchronization
|   |   |-- Concurrency Utilities (Executors Framework, Callable and Future, Locks and Semaphores)
|
|-- Java Standard Libraries
|   |-- I/O Streams
|   |   |-- File Handling (File Class, Reading and Writing Files)
|   |   |-- Streams (Byte Streams, Character Streams, Buffered Streams)
|   |
|   |-- Networking
|   |   |-- Sockets (TCP and UDP, Socket and ServerSocket Classes)
|   |   |-- URL and HTTP (URL Class, HttpURLConnection)
|   |
|   |-- JDBC
|   |   |-- Database Connectivity (JDBC Drivers, Connection, Statement, and ResultSet)
|   |   |-- PreparedStatement and CallableStatement
|
|-- Java Frameworks
|   |-- Spring Framework
|   |   |-- Spring Core (Dependency Injection, Inversion of Control)
|   |   |-- Spring MVC (Model-View-Controller Architecture)
|   |   |-- Spring Boot (Creating Spring Boot Applications, Starters and Auto-Configuration, Actuator)
|   |
|   |-- Hibernate
|   |   |-- ORM Basics (Introduction to ORM, Configuration and Mapping)
|   |   |-- Advanced Hibernate (Caching, Transactions and Concurrency, Criteria API)
|
|-- Web Development with Java
|   |-- Java EE (Jakarta EE)
|   |   |-- Servlets (Lifecycle, Handling HTTP Requests and Responses, Session Management)
|   |   |-- JavaServer Pages (JSP) (Syntax, Directives, JSTL and Custom Tags, Expression Language)
|   |
|   |-- RESTful Web Services
|   |   |-- JAX-RS (Creating RESTful Services, Annotations and HTTP Methods, Consuming RESTful Services)
|
|-- Build Tools and Dependency Management
|   |-- Maven
|   |   |-- Project Object Model (POM), Dependencies, Repositories, Build Lifecycle and Plugins
|   |
|   |-- Gradle
|   |   |-- Build Scripts, Dependency Management, Task Automation
|
|-- Testing in Java
|   |-- Unit Testing
|   |   |-- JUnit (Annotations, Assertions, Test Suites and Runners)
|   |
|   |-- Mockito (Creating Mocks and Spies and Verification)
|   |
|   |-- Integration Testing
|   |   |-- Spring Test (Testing Spring Components and WebTestClient)
|
|-- Deployment and DevOps
|   |-- Containers and Microservices
|   |   |-- Docker (Dockerfile, Image Creation, Container Management)
|   |   |-- Kubernetes (Pods, Services, Deployments, Managing Java Applications on Kubernetes)

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🌟 Applications of Java You Should Know 🌟

Java's versatility makes it a go-to language for a variety of applications. Here are the top areas where Java shines:

1️⃣ Mobile Applications:

- Powering Android apps through frameworks like Android SDK.

2️⃣ Desktop GUI Applications:

- Used to create user-friendly graphical interfaces with tools like JavaFX and Swing.

3️⃣ Web-based Applications:

- Building robust web apps using frameworks like Spring, Hibernate, and Struts.

4️⃣ Enterprise Applications:

- Ideal for large-scale business solutions like CRM, ERP systems, using Java EE.

5️⃣ Scientific Applications:

- Java’s precision and reliability make it suitable for scientific research and simulations.

6️⃣ Gaming Applications:

- Java is used for creating cross-platform games and 2D/3D game engines.

7️⃣ Big Data Technologies:

- Supporting frameworks like Hadoop and Apache Kafka for data processing.

8️⃣ Business Applications:

- Simplifies tasks like inventory management and customer service applications.

9️⃣ Distributed Applications:

- Java helps create applications that can run on multiple servers, ensuring scalability.

🔟 Cloud-based Applications:

- Java is widely used for building SaaS, IaaS, and PaaS platforms.

💡 Why Java? Its platform independence, security, and scalability make it ideal for these diverse applications. 🚀

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Java list methods 💪

Java Developer Interview ❤

𝗧𝗼𝗽𝗶𝗰 𝟭: 𝗣𝗿𝗼𝗷𝗲𝗰𝘁 𝗳𝗹𝗼𝘄 𝗮𝗻𝗱 𝗮𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲
- Please tell me about your project and its architecture, Challenges faced?
- What was your role in the project? Tech Stack of project? why this stack?
- Problem you solved during the project? How collaboration within the team?
- What lessons did you learn from working on this project?
- If you could go back, what would you do differently in this project?

𝗧𝗼𝗽𝗶𝗰 𝟮: 𝗖𝗼𝗿𝗲 𝗝𝗮𝘃𝗮
- String Concepts/Hashcode- Equal Methods
- Immutability
- OOPS concepts
- Serialization
- Collection Framework
- Exception Handling
- Multithreading
- Java Memory Model
- Garbage collection

Tech Community
👉 t.me/Java_Programming_Notes

𝗧𝗼𝗽𝗶𝗰 𝟯: 𝗝𝗮𝘃𝗮-𝟴/𝗝𝗮𝘃𝗮-𝟭𝟭/𝗝𝗮𝘃𝗮𝟭𝟳
- Java 8 features
- Default/Static methods
- Lambda expression
- Functional interfaces
- Optional API
- Stream API
- Pattern matching
- Text block
- Modules

𝗧𝗼𝗽𝗶𝗰 𝟰: 𝗦𝗽𝗿𝗶𝗻𝗴 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸, 𝗦𝗽𝗿𝗶𝗻𝗴-𝗕𝗼𝗼𝘁, 𝗠𝗶𝗰𝗿𝗼𝘀𝗲𝗿𝘃𝗶𝗰𝗲, 𝗮𝗻𝗱 𝗥𝗲𝘀𝘁 𝗔𝗣𝗜
- Dependency Injection/IOC, Spring MVC
- Configuration, Annotations, CRUD
- Bean, Scopes, Profiles, Bean lifecycle
- App context/Bean context
- AOP, Exception Handler, Control Advice
- Security (JWT, Oauth)
- Actuators
- WebFlux and Mono Framework
- HTTP methods
- JPA
- Microservice concepts
- Spring Cloud

𝗧𝗼𝗽𝗶𝗰 𝟱: 𝗛𝗶𝗯𝗲𝗿𝗻𝗮𝘁𝗲/𝗦𝗽𝗿𝗶𝗻𝗴-𝗱𝗮𝘁𝗮 𝗝𝗽𝗮/𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲 (𝗦𝗤𝗟 𝗼𝗿 𝗡𝗼𝗦𝗤𝗟)
- JPA Repositories
- Relationship with Entities
- SQL queries on Employee department
- Queries, Highest Nth salary queries
- Relational and No-Relational DB concepts
- CRUD operations in DB
- Joins, indexing, procs, function

𝗧𝗼𝗽𝗶𝗰 𝟲: 𝗖𝗼𝗱𝗶𝗻𝗴
- DSA Related Questions
- Sorting and searching using Java API.
- Stream API coding Questions

Tech Jobs and Internships
t.me/getjobss

𝗧𝗼𝗽𝗶𝗰 𝟳: 𝗗𝗲𝘃𝗼𝗽𝘀 𝗾𝘂𝗲𝘀𝘁𝗶𝗼𝗻𝘀 𝗼𝗻 𝗱𝗲𝗽𝗹𝗼𝘆𝗺𝗲𝗻𝘁 𝗧𝗼𝗼𝗹𝘀
- These types of topics are mostly asked by managers or leads who are heavily working on it, That's why they may grill you on DevOps/deployment-related tools, You should have an understanding of common tools like Jenkins, Kubernetes, Kafka, Cloud, and all.

𝗧𝗼𝗽𝗶𝗰𝘀 𝟴: 𝗕𝗲𝘀𝘁 𝗽𝗿𝗮𝗰𝘁𝗶𝗰𝗲
- The interviewer always wanted to ask about some design patterns, it may be Normal design patterns like singleton, factory, or observer patterns to know that you can use these in coding.

PDFs and Notes 📝
t.me/Java_Programming_Notes

Best Programming Resources: https://topmate.io/coding/886839

All the best 👍👍

Java Backend Development is a highly in-demand and well-paying job in the tech industry.

If you're looking to become an excellent Java Developer, here's a roadmap that includes various online resources:

1. Core Java

First comes the fundamentals of Java Programming, here you will understand OOP concepts, conditional statements, collection frameworks,and many more.

https://youtube.com/playlist?list=PLd3UqWTnYXOnjGmyjD3zbIkyLXP15-6w0&si=UYvQhVNlZQYCH1Il

2. JDBC

A  Java API that allows you to access tabular data, especially data stored in a relational database.

https://youtube.com/playlist?list=PLsyeobzWxl7rU7Jz3zDRpqB-EODzBbHOI&si=Cc45vpeRXGIUKbfn

3. SQL

Get a good understanding of SQL, which is necessary to work with JDBC to write queries.

https://youtu.be/7S_tz1z_5bA

4. JSP + Servlet

Learn JSP and Servlet, which are used for writing web pages for web applications and handling client requests on the server-side.

https://youtube.com/playlist?list=PLE0F6C1917A427E96&si=TQeOIgluG3R29622

5. Spring Framework

5.1. Core Spring Framework

https://youtu.be/GB8k2-Egfv0?si=dHYp6rFkGVl9RMt8

5.2. Spring REST & Spring DATA

https://youtu.be/GwYUjzPrQTM?si=hJfmpukii2WnofxQ

5.3. Spring Security
Spring Security is the primary choice for implementing application-level security

https://youtu.be/sm-8qfMWEV8?si=uMkpBxOUXIptZif9

6. Hibernate Framework

Hibernate is a Java framework that simplifies the development of Java application to interact with the database. It is an open source, lightweight, ORM (Object Relational Mapping) tool.

https://youtu.be/Yv2xctJxE-w?si=q4FIOBxxX-Y0Qj5q

7. Spring Boot

Spring Boot is the ultimate framework and Makes Java Web Development less boilerplate, it can help you make production-ready applications in no time.

https://youtu.be/msXL2oDexqw?si=XB19MCCECAggcB18

8. Basic DevOps

8.1. Learn to Use AWS & Deploy Java Apps

https://youtube.com/playlist?list=PLVz2XdJiJQxxurKT1Dqz6rmiMuZNdClqv&si=bJyg0Np11PkGDIKO

8.2. Learn Basic Docker:

https://youtu.be/p28piYY_wv8?si=Xoqje7MJad1NeE9g

8.3. Learn Basic Kubernetes:

https://youtu.be/rTNR7vDQDD8?si=dgzwxQof7yGHUP4n

8.4. Deploy Spring Boot App on Kubernetes:

https://youtu.be/EZolJ4lNiYc?si=Kw09qKwMp_LxHTvw

9. Basic of git and GitHub
https://youtu.be/apGV9Kg7ics?si=MHtCgD8o7XqpU4W3

10. Java Microservices

https://youtu.be/tuJqH3AV0e8?si=1jjrWl4l4uYGrE5i

14. Java Quick revision for Interviews

https://youtu.be/oYXivKMSEqM?si=tngbZrvgbAwsShEb

15. Spring JMS(java messaging services)

JMS is a standard Java API that allows a Java application to send messages to another application.

https://youtube.com/playlist?list=PLmCsXDGbJHdibOx6axScPiuHA8ftsrmut&si=J0qjBSbB4GDCeTOv

𝐉𝐨𝐢𝐧 𝐭𝐡𝐢𝐬 𝐭𝐞𝐥𝐞𝐠𝐫𝐚𝐦 𝐠𝐫𝐨𝐮𝐩 𝐟𝐨𝐫 𝐩𝐫𝐞𝐦𝐢𝐮𝐦 Resources/Notes: https://t.me/udacityfreecourse