How to Learn Java Online

How to Learn Java Online: Step By Step Guide

Java opens up a host of opportunities for those who wish to pursue a career in the field of programming and software development. After all, over 3 billion smart devices run on Java, and that explains the potential of this programming language. If that seems interesting and you wish to learn Java online, then here’s a clear roadmap to do that in the best way possible.

Why Learn Java?

According to, the average salary of a Java Programmer in the US is around $92,424. This can be much higher depending on the Professional’s certifications, experience, and expertise. With so many devices running on various platforms, Java is the most preferred choice as it is a platform-independent language. Besides being platform-independent, it is also a mature programming language with highly resourceful libraries. These two traits — platform-independence and capable libraries — make software development a lot easier.

Java is an Object-Oriented Programming language (OOP) like C++ but is a lot more popular because it is platform-independent. If you are wondering what an OOP is, then it merely means that you can break down a sophisticated program into objects. This lets you manipulate specific portions of the program and reuse them. Finally, learning Java also makes it easier to learn Ruby, Python, and several other programming languages.

The Right Plan of Action to Learn Java Online

When you set out to learn Java online, the most overwhelming task is to narrow down your resources and then follow a specific plan of action. We recommend that you find resources that are comprehensive and created by professional programmers. So you need to find one that gives you a detailed understanding of both theoretical and practical aspects of Java. For example, Code Gym is one such resource that consists of 600 lessons that explain the theoretical concepts along with over 1200 possible tasks. Here’s a quick plan of action for you to learn all of that in the most effective manner.

Start with Java Core

Before you move to any advanced technologies, you must start with Java Standard Edition (Java SE), commonly referred to as Java Core. This begins by understanding the syntax and certain other basic concepts.

Learn the Syntax

In programming, syntax does precisely what grammar does in case of a language — it structures. However, to learn the syntax, you need to spend hours on practical exercises until you get better at it. This could take some time as Java is case-sensitive, which means that you need to know when to use the upper or lower cases.

Other concepts

Once you are comfortable with the syntax, you need to learn other important concepts like objects, classes, methods, operators, statements, and arrays. You must understand how these concepts impact your project to use them in the right manner to achieve the desired goal.

Learn Object-Oriented Java

This involves going a step further and creating reusable methods and variables. So, you must learn OOPS concepts like Inheritance, Overriding, Polymorphism, Abstraction, Encapsulation, and Interfaces.

Know Java Collections

Once you have established a stronghold over the syntax and other essential concepts, then you need to know about the Java Collections Framework. This gives you access to a pre-packaged reusable set of classes and interface, which makes development a lot easier.

Master Exceptions

There are certain things that you don’t want the program to do, and by mastering exceptions in Java, you can do that in a flash. In the long run, this helps you fix the bugs and handle Events like a Pro.

Develop your Unit Testing Skills

As a new Programmer, you would be expected to unit test programs that typically require you to test smaller units like classes and methods. You need to be able to run these classes or units independently to ensure that each of these units can be reused.

Get a hold over Lambda Expressions

Introduced in Java SE 8, Lambda expressions are something that you can no longer ignore since these facilitate the implementation of a functional interface and reduce the amount of code. Also, since lambda expressions are considered to be functions, they do not create the .class file when compiled. Since this is a new concept, we recommend that you consider spending some extra time on it.

Move to More Advanced Topics

Once you are done with the abovementioned topics and have a hold over the basic concepts, it’s time to move to more advanced topics like serialization, which involves encoding objects into a string. Besides that, there are several other advanced concepts that you need to learn. Always remember that Java has been around for over two decades and is a mature programming language. So the learning curve is pretty steep.

Learn to Code Like a Pro

Java programming can be inspiring if you know to code effortlessly, and that comes with the right guidance during the initial stages of learning. Without timely guidance, even easy-to-learn and straightforward Java concepts can seem complicated and overwhelming. This is precisely why most people who learn Java online tend to give up midway. Code Gym helps overcome this problem by extending professional assistance through verified virtual mentors.

Code Gym also offers intensive practice sessions that make coding easier with an enormous collection of 1200 practical tasks, which sums up to about 500 hours of practice. So almost eighty percent of the course involves hardcore coding and practical sessions, which gives you the necessary insights. Also, with a strong Java community, you can have engaging discussions with others.

Know the Basics

To learn Java online, you need to have access to the right set of resources, and below listed are some of the best ones to help you understand the basics of Java. So don’t be overwhelmed by the countless free and paid resources which are available for you to learn Java online. Instead, consider the below-listed resources:

  • Learn from over 600 lessons and 1200 practical Java tasks on CodeGym
  • Watch this to learn Java SE 8. 

Read the latest edition of the book ‘Java: A Beginner’s Guide’ by Herbert Schildt.

Challenge yourself to Plan your Algorithm

An algorithm defines how the program responds to different problems, and if you can do this right, then you are halfway through learning Java. Being able to this right confirms that you know to give out the right set of instructions to the computer to function in a certain manner.

Be Part of a Community and Interact

When you learn Java online, you don’t have to work in isolation and deprive yourself of the opportunity to interact with others. Resources like Code Gym have their very own virtual mentors and online community. These resources let you interact with other developers and find very specific solutions to your problems. You can also get onto other popular forums like Reddit, Stack Exchange, and Stack Overflow.

Read more about Java Programming

Make it a habit to read about the latest trends in Java programming and how professionals solve complex problems. You can do that by regularly reading through the abovementioned forums and other useful resources.

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