How To Become A Good Java Developer?

6 min readMar 19, 2023

Java is one of the most popular programming languages used in the world of software development. Its versatility, ease of use, and platform independence make it a popular choice for developers throughout industries. Becoming a good Java developer takes time, effort, and dedication, but with the right approach, anyone can master this programming language. Below are the key steps that you can take on ‘How to become a good Java developer.’

Java Developer

1. Learn and be expert in the fundamentals: Core Java

The first step in becoming a good Java developer is to learn the fundamentals of the language. This includes understanding the syntax, data types, control structures, and object-oriented programming (OOP) concepts. Furthermore, make sure that you grasp basic concepts like operators, arrays, loops, String, Collections, Exceptions, Threads etc. Moreover, have an understanding of general-purpose APIs like java.math, java.oi, java.lang etc.

Oracle community is releasing new versions of JDK at the interval of every six months. You should at least have a clear understanding of Java 8 and its features. A good resource to start with very basic is the Oracle’s own Java learning platform. Sometimes, beginners or even experienced professionals find the oracle documentation either lengthy or tough to understand. In that case, you can also start by going through popular blogs having good content, or reading a good Java book. Some popular Java books for beginners include “Head First Java” by Kathy Sierra and Bert Bates and “Java: A Beginner’s Guide” by Herbert Schildt.

2. Continue Practicing hands on

The best way to learn Java programming is by writing code. You can start by solving simple programming problems, such as calculating the sum of two numbers, printing a message on the console, or implementing a simple calculator. As you progress, you can work on more complex problems and applications. Practice not only helps you improve your coding skills but also helps you identify and fix errors quickly.

In theory, you will be ready to provide an answer about Java, however, when it involves implementing or demonstrating it at Java language, it becomes a bit tough. Once you practice more, it helps you understand the limitations of the language also.

3. Learn Basics of Database

As a Java developer, it is important to have a basic understanding of databases and how they work. Most Java applications interact with databases in some way, whether it’s storage and retrieval of data, or performing more complex queries and transactions.

At a minimum, a Java developer should understand the following concepts related to databases:

  1. Relational databases: Java developers should understand the basic principles of relational databases, including tables, rows, columns, keys, and relationships.
  2. NoSQL Databases: As a Java developer, you should have a good understanding of NoSQL databases and how they differ from traditional relational (SQL) databases.
  3. SQL: Java developers should have a basic understanding of SQL (Structured Query Language) and how to use it to create, modify, and query databases.
  4. JDBC: Java Database Connectivity (JDBC) is a Java API for connecting to and interacting with databases. Java developers should understand how to use JDBC to perform basic database operations, such as inserting, updating, and retrieving data.
  5. Object-Relational Mapping (ORM) frameworks: ORM frameworks like Hibernate and JPA make it easier to interact with databases using Java objects. Java developers should understand the basic concepts of ORM and how to use these frameworks to map Java objects to database tables.
  6. Database design: Although not strictly necessary, a basic understanding of database design principles can be helpful for Java developers. This includes topics like normalization, data modeling, and database schema design.

A Java developer does not need to be an expert in databases, but should have a solid understanding of the basics and be able to work with databases as part of their job.

4. Do practice on Advanced Java

When you are done with Core Java, move on Java EE (Java Enterprise Edition). Some people in the industry also call it ‘Advanced Java’. Learning Java EE allows you to have experience on web development projects, because Java EE includes specifications of additional features like web services and distributed computing. For example, there are technologies like Java Server Pages, Servlet, JDBC, JPA etc., which are suited for web applications.

You will also get to know how to use web server or application server in this part. Moreover, having knowledge of Java EE also helps you to understand modern frameworks such as Spring, Spring Boot etc. easily. Before practicing advanced Java topics, make sure you have set up the development environment for the same.

Set up a development environment for Java EE: To practice Java EE/Advanced Java, you’ll need to set up a development environment that includes an IDE (Integrated Development Environment), such as Eclipse, STS, IntelliJ or NetBeans, and a Java EE server/Web Server, such as Apache Tomcat, or GlassFish.

Develop Projects Using JSP, Servlets, JDBC

The things you learn in Jakarta EE are often integrated with front-end technologies such as CSS, HTML, JavaScript, and jQuery to allow you to create mini web applications. Consider developing different projects using JSP, Servlets, JDBC. This way, you’ll become confident about your knowledge of these technologies. The practice of developing projects using JSP, Servlets, JDBC will make you confident in understanding other frameworks like Spring, Hibernate, Web Services etc.

5. Get into frameworks like Spring, Hibernate, Spring Boot

After you’re finished with SE and EE, you should now consider learning Java Frameworks, such as Spring Framework and Hibernate Framework. As a Java developer, Spring, and Hibernate are the most important frameworks including Spring Boot as well. Furthermore, most of the Java development companies develop web apps using the Spring framework, such as Spring MVC, Spring REST, Spring Boot, and Spring Cloud.

Hibernate framework is known for mapping Java objects to database tables. We also call it Object-relational mapping (ORM) tool. Alternatively, if you are well known with JPA concepts, you don’t need to learn Hibernate additionally.

Spring Boot is the most popular and trending framework these days among developers and the development companies. Some people directly wish to work with Spring Boot, but this approach is not correct for a long term. You should at least have knowledge on Spring Core and JDBC Concepts to work smoothly on Spring Boot. However, Core Java knowledge is must here also.

6. Start developing Projects on Microservices Architecture

As we know that Microservices based applications are in high demand these days, irrespective of the programming languages. They are becoming popular exponentially day by day. Many big companies in the industry are already using this concept and developers are also becoming well-versed in the same. So, if you want to remain at the top position in the profession, you will have to adapt yourself to learn the most popular and trending technologies & concepts accordingly.

Hence, start learning Microservices concepts and apply them in developing small applications. Moreover, developers with the knowledge of Spring Boot with Microservices are on high demand in the market.

7. Learn Design Principles & Design Patterns

Design Principles and Design Patterns are two important concepts in Java programming that are used to develop high-quality software that is easy to maintain, scalable, and flexible.

Design Principles are general guidelines or best practices that are used to create software that is maintainable, reusable, and easy to understand. These principles help developers create code that is easy to modify and extend in the future.

Design Patterns are proven solutions to common problems that software developers encounter when creating software. These patterns are tried and tested solutions to recurring design problems that can help developers create code that is more flexible, scalable, and maintainable.

8. Learn DevOps Practices & Tools

Learning Java and its frameworks are not sufficient to become a successful Java Developer. You should also learn popular methodology of developing and delivering an application like DevOps. Many development companies are shifting to DevOps and adapting the use of continuous integration as deployment. There are lots of tools and principles to learn in DevOps.

The word ‘DevOps’ is a combination of software development and IT operations. It has become an essential aspect of modern software development. It is a set of practices and tools that help organizations automate their software development processes and improve coordination between development and operations teams.

9. Learn Repository System Tools like Git

A Repository System is an essential tool for managing code in software development. It helps ensure code quality, collaboration, reliability, and offers a platform for managing the entire software development lifecycle. There are various tools available for repository systems, such as Git, Subversion (SVN), Mercurial, Perforce, Apache Subversion Edge, etc. Git is the most popular among Java developers.

By following these steps, you can become a good Java developer. Remember to have patience and persistence in your learning, as it takes time to become proficient in any skill. With dedication, practice, and continuous learning, you can achieve success as a Java developer and contribute to the constantly growing world of technology.