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Before getting into Java courses that are free of cost available to us, let us first throw some light on Java basics to brush up your understanding. Further ahead in the article, we have compiled some top free Java courses that will come in handy if you wish to kickstart your career in Java.

  1. What is Java: A Brief Understanding
  2. History of Java
  3. Java Usage
  4. Applications of Java
  5. Top 6 Free Java Courses
  6. Conclusion

What is Java: A Brief Understanding

Java is a programming language that produces software for many platforms. It is the most popular programming language for Android smartphone apps, standalone desktop apps, and also web applications that are distributed between clients and servers on a network.

Java is a fully programmed programming language. The Java program is compiled up to bytecode by the Java developer. So, bytecode can be converted to Java virtual machine, running on multiple platforms, Mac, PC, or Unix computers into machine code. The JIT compiler integrates bytecode into the machine’s native code “in real-time” to work, thus improving JVM performance.

It is easy to use, reliable, secure, and independent platform.

Java courses

History of Java

Java was originally founded by James Gosling at Sun Microsystems (which has been acquired by Oracle Corporation) and was released in 1995 as a key component of Sun Microsystems’ Java platform.

Language gets most of its syntax in C and C ++, but it has fewer resources than any of them.

Java Usage

Java Enterprise Edition (Java EE) is a popular platform that provides an API and working environment for writing and using business software, which includes network applications and web services. Also, Oracle says Java operates on 97% of business computers.

Terms for the creation of a Java language:

  • It must be “simple, focused, and general”.
  • It must be “strong and secure”.
  • Must be “architecture-neutral and portable”.
  • Must work with “high performance”.
  • It must be “translated, activated, and powerful”.

Applications of Java

Mobile Applications

Java is invincible in application development due to its platform autonomy. The source code generated in Java provides posts that are compatible with most forums. Although many programming languages ​​require a component to reduce the size of the code in order to be installed Java allows us to be able to use portable code on all devices. Source files in Java are known as ‘bytecode’. This bypass code used by Java Virtual Machine (JVM) on all devices allows Java to stand in one place and easily extract the same source code across different device forums.

Web-based Applications

Web applications are applications that run on more than one computer and communicate using a network and server. Web applications are made to access using a web browser. The ability to update and maintain Java web applications without installing any software on thousands of client computers becomes an important reason for the need.

Business Applications

Java Enterprise applications are a specific set of Java SE (Standard Edition) specifications. J2EE (Java 2, Enterprise Edition) provides a platform for developers with business features such as distributed computer and web services. J2EE applications come in handy during reference time applications such as micro servers or application servers. Some of J2EE’s applications are e-commerce, accounting, banking information systems, etc.

Science Applications

Java provides security, durability, high performance, portability, etc. which are also mandatory features of any scientific application. MATLAB is an example of a Java application based on Java technology.

Game Applications

Java has game programs but creates the problem of occasional game delays as garbage collection cycles can cause significant breaks. However, this problem will be solved in newer versions of Java Virtual Machines (JVMs).

An example of a Java gaming engine jMonkeyEngine with unparalleled capability when it comes to 3D game design.

Big Data Applications

The Big Data source framework associated with Big Data called ‘Hadoop’ is written in Java only. Thanks to its stack supply system, statistical data is established over time. Its automatic garbage collection and memory distribution feature give it more limits than other programming languages.

It is very clear that Java is the backbone when it comes to developing Big Data applications.

Business Applications

Many companies use software developed using Java. Java is flexible and easy to use. Also, in the banking sector and other sectors, most applications are designed using Java only.

The J2EE platform is designed to help developers build large, multi-stage, multi-level, reliable, and secure network applications. These apps are for big businesses. Java applications developed in Java are less complex compared to other languages. J2EE forum reduces the complexity of a business application.

Distributed Applications

Distributed applications communicate with multiple servers on the same network. This means that the data is still distributed over more than one computer in the network.

These applications have a few common requirements that arise mainly due to their distribution and flexible system environment.

Jini (Java Intelligent Network Infrastructure) represents the infrastructure for providing, registering, and acquiring distributed services based on its specifications. One important part of Jinni is JavaSpaces, a method that supports distribution, persistence, and migration across networks.

Cloud-based Applications

Cloud computing refers to the use of remote Internet servers to store, manage and process data instead of using a local computer. It is a platform commonly used by a distributed computer system.

There are a variety of Java cloud development tools such as the Oracle Java Cloud service that serves as a platform for creating and configuring the Oracle WebLogic Server and application space without any hassle, you can also learn oracle to understand more.

Top 6 Free Java Courses

In the information age, we have so many free resources available on the internet. Such is the case with online courses as well that are vividly available for free. However, that does not make them automatically good for us and our careers. Picking the best course from the lot remains an actual task to this day. So, to make it easier for you, we have compiled the top 6 free Java courses offered by Great Learning for anyone interested to land a job with exceptional Java skills. Working on Java projects for beginners will help you land a job.

1. Java Programming Course

Starting from what is Java to Java IDE installation, it covers the most basic concepts of Java slowly moving towards the advanced ones. You will be taken through what Variables, Data Types, and Operators in Java. Then you will also be made to cover Functions and Arrays in Java. Further ahead in these Java courses, you will also be made to write your first Java program and cover many other essential Java topics. Here are the topics you will learn during this Java Programming Course:

  • Variables and Data Types
  • Operators
  • Flow Control Statements
  • Functions
  • Arrays

Enrollment Link:Java Course

Duration: 2 Hours

2. OOPs in Java

So, now that you are well-versed with the basics of Java and have a decent grasp on it, it’s time to put more light on OOPs concepts in Java. At this time, you might already be aware of OOPs and how Java is an object-oriented language. OOPs in Java is the most important concept of Java and anyone looking to make a career in the language should have a good command of OOPs. This OOPs in Java course will take you through the entire concept of OOPs and inheritance in Java.

Enrollment Link:OOPs in Java

Duration: 1.5 hours

Also Read: OOPs concepts in Java

3. Data Structures & Algorithms in Java for Beginners

This Java Data Structures course will set the basis for what is the requirement for data structures and algorithms in Java and also talk about their importance. To sum up, the Java course will revolve around time complexity, recursion, searching, and sorting. The course will also go on to throw some light on various data structures in Java like Arrays, Linked lists, Stacks, Queues, etc. Before wrapping the Java course up, the course instructor will also have you go through the questions that may appear in the coding interviews for specific companies.

Enrollment Link:Data Structure & Algorithms in Java for Beginners

Duration: 1.5 hours

4. Data Structures & Algorithms in Java for Intermediate Level

Now that you are one step ahead in the Java game, you can go forward and learn about Data Structures and Algorithms in Java. In this Java course, you will learn about Time Complexity, the need for sorting algorithms, different types of sorting algorithms such as bubble sort, quick sort, merge sort, and insertion sort. The free online course in DSA in Java will focus on:

  • Data Structures
  • Algorithms
  • Time Complexity
  • Tower Of Hanoi
  • Assignment Solutions
  • Tower Of Hanoi Example
  • Sorting Algorithm: Bubble, Quick, Merge, and Insertion Sort

Enrollment Link:Data Structure & Algorithms in Java for Intermediate Level

Duration: 4 hours

Also Read: Data Structures & Algorithm using Java a Beginners Guide

5. JDBC in Java

Before getting your hands dirty in Java projects and applications, you must understand the Database languages. Also known as Java Database Connectivity, JDBC is used for Java and Database in order to develop an entire Java application. This course will talk about:

  • JDBC fundamentals
  • JDBC Architecture
  • Types of Drivers
  • The 7 steps of JDBC
  • JDBC Implementation

Enrollment Link:JDBC in Java

Duration: 1 hour

6. Java Applications & Projects

Finally, you have come so far and understand the basics as well as some advanced topics of Java. It is now time to put your Java learning to practice and work on developing Java applications or projects. This is a sure-shot way to solidify your learning and prove that you have the capability to become a Java expert.

Start Developing Java Applications & Solidify Your Learning

Enrollment Link:Java Applications

Duration: 1 hour

Work on Java Projects & Highlight them on your Resume

Enrollment Link:Java Projects

Duration: 30 minutes

In A Nutshell…

We talked about a lot of Java courses in this blog and we also hope that you would be able to make the most out of them. Don’t forget the USP these online Java courses come with. They offer free certificates after the course completion and if the candidate passes the assessment test. You can highlight these certificates on your Resume, share them on your Linkedin account, and more.

So, kickstart your career with these free Java courses, start exploring and enrolling today. Upskill and reskill yourself with these free Java courses and don’t forget to work on Java projects to solidify your learning.