Java Roadmap for Beginners 2022

In this article, let's take a look at the roadmap to learning Java in 2022.
Check out Full Stack Java Developer Roadmap for Beginners 2022.
If you want to learn and don’t know the Java topics, Java frameworks, and the tools you need to know to work on Java projects then you are in a right place.

Well, this Java Roadmap is intended to serve as a guideline for anyone who is planning to start learning Java in the year 2022.

This Java roadmap is my personal opinion, having worked with Java for 10 years and creating content on this blog has given me a pretty good idea to suggest a road map for you to follow. 

YouTube Video

I have explained the Roadmap to learn Java in 2022 in the below YouTube video:

Java Roadmap for Beginners 2022 - Flowchart

3. Learn Collections Framework

  1. Collections Framework in Java
  2. Collections Framework - The Collection Interface
  3. Collections Framework - The Set Interface
  4. Collections Framework - The SortedSet Interface
  5. Collections Framework - The List Interface
  6. Collections Framework - The Queue Interface
  7. Collections Framework - The Deque Interface
  8. Collections Framework - The Map Interface
  9. Collections Framework - The SortedMap Interface
  10. Collections Framework - ArrayList Class
  11. Collections Framework - LinkedList Class
  12. Collections Framework - CopyOnWriteArrayList
  13. Collections Framework - HashSet Class
  14. Collections Framework - LinkedHashSet Class
  15. Collections Framework - TreeSet Class
  16. Collections Framework - CopyOnWriteArraySet
  17. Collections Framework - EnumSet
  18. Collections Framework - HashMap Class
  19. Collections Framework - LinkedHashMap Class
  20. Collections Framework - TreeMap class
  21. Collections Framework - EnumMap
  22. Collections Framework - WeakHashMap
  23. Collections Framework - IdentityHashMap
Learn more about Java Collections on Java Collections Tutorial

5. Learn Java Multithreading

  1. How to Create and Start a Thread in Java
  2. Java Thread Sleep Example
  3. Java Thread Join Example
  4. Java Thread Set Name Example
  5. Java Thread interrupt Example
  6. Java Thread Priority Example
  7. Java Thread isAlive Example
  8. ThreadGroup class in Java
  9. Thread Class in Java
  10. Runnable Interface in Java
  11. Synchronization in Multithreading Java
  12. ThreadLocal class in Java
To know in-depth about Java multi-threading on Java Multithreading Tutorial

6. Functional Programming (Java 8 Main Features)

7. Java Input/Output

8. Learn Data Structures and Algorithms

DS Stack

  1. Stack Data Structure in Java
  2. Stack Implementation using Array in Java
  3. Dynamic Stack Implementation using Array in Java
  4. Stack Implementation using Linked List in Java
  5. Stack Implementation using Array List
  6. Generic Stack Implementation in Java
  7. Reverse a String using Stack Data Structure in Java
  8. How to Reverse a Stack in Java

DS Queue

Advanced Java

1. Learn JDBC

JDBC stands for Java Database Connectivity, which is a standard Java API for database-independent connectivity between the Java programming language and a wide range of databases.

By learning JDBC, you will be able to connect your Java project to an underlying database.

2. Learn Servlets

Java servlets are Java classes that are designed to respond to HTTP requests in the context of a Web application.
By learning Servlet, you will be able to understand how to process the HTTP request, how to return HTTP response, how to build a web page, etc.

3. Learn JPA

The Java Persistence API (JPA) is the Java standard for mapping Java objects to a relational database. Mapping Java objects to database tables and vice versa is called Object-relational mapping (ORM).

By learning JPA, you will be able to map Java class into the database table directly (using ORM).

4. Learn JAX-RS

JAX-RS is Java API for RESTful Web Services (JAX-RS) is a Java programming language API spec that provides support in creating web services according to the Representational State Transfer (REST) architectural pattern.
There are two main implementations of JAX-RS API:
1. Jersey Framework
2. RESTEasy
By learning JAX-RS and its implementations, you will be able to develop RESTFul web services in Java.

5. Learn Design Patterns

In software engineering, a design pattern is a general repeatable solution to a commonly occurring problem in software design. A design pattern isn't a finished design that can be transformed directly into code. It is a description or template for how to solve a problem that can be used in many different situations.
By learning Design patterns, you will be able to apply commonly used design patterns in real-time project development to solve a particular problem.

6. Learn Thymeleaf

Thymeleaf is a modern server-side Java template engine for both web and standalone environments, capable of processing HTMLXMLJavaScriptCSS, and even plain text.
By learning the Thymeleaf template, you will be able to build dynamic HTML web pages in Spring MVC projects.

Build Tools

Maven

Maven is a popular build and dependency management tool in Java.

Gradle

Gradle is an open-source build automation tool that is designed to be flexible enough to build almost any type of software

By learning Maven or Gradle, you will be able to build Java projects as WAR, JAR, or EAR.

Spring Framework

Learn Spring Core

Learn Spring core fundamentals such as:
  • Dependency injection
  • Spring IOC
  • Spring beans
  • Spring bean life cycle
  • Spring configuration styles (XML, Java-based, and annotation-based) 
  • Learn important annotations
By learning Spring core, you will be able to understand how to use DI, IOC, Spring beans in Spring-based applications.

Learn Spring Security

Spring Security is a framework that provides authentication, authorization, and protection against common attacks. 

Also, learn JWT for token-based authentication.

By Learning Spring security, you will be able to secure web applications as well as REST APIs.

Learn Spring Data JPA

The goal of the Spring Data JPA module is to significantly reduce the amount of boilerplate code required to implement data access layers for various persistence stores.

By learning Spring Data JPA, you will be able to develop a repository/DAO layer without writing boilerplate code.

Learn Spring MVC

Spring MVC is a web MVC framework for building web applications as well as RESTful web services.

By learning Spring MVC, you will be able to develop web applications as well as RESTful web services.

Learn Spring Boot

Spring Boot is basically an extension of the Spring framework which eliminated the boilerplate configurations required for setting up a Spring application.

By learning Spring Boot, you will be able to develop REST APIs, web applications, and Microservices.

Hibernate Framework

Learn and master Hibernate framework at Hibernate ORM Framework

Essential skills

Git

Learn Git as a version control system for your projects.

SQL

Learn SQL to query the relational databases.

Databases

As a Java programmer, you should have good knowledge of databases.

Here are the commonly used relational databases and No SQL databases:

RDBMS

  • MySQL
  • PostgreSQL
  • MS-SQL server
  • Oracle

No SQL Databases

  • MongoDB
  • Cassandra

Testing Java Application

Check out the JUnit framework and Mokito for unit testing in Java. As a Java programmer, you should have good knowledge of testing your core logic using the JUnit framework.

To learn and master the JUnit framework at JUnit tutorials

Commonly used libraries for Java development

It's also important for Java programmers to learn commonly used utility libraries for Java development.

- Parsing libraries - Jackson, GSON
- Logging libraries - Log4j
- Apache Commons - Lang, IO

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