Codecademy is an online website that offers a free Java course that you can take online. You can learn important Java coding fundamentals and practice your new skills with hands-on projects and quizzes. All of Codecademy's teaching skills will go from basic to practical. In Codecademy, there will be two forms: free and paid. You still have the option of learning the basic but necessary knowledge before stepping foot into Java programming.

When you join Codecademy, you'll learn both theory and practice to keep you up to speed and perfect. Codecademy is so popular because of its flexibility and ability to create many types of applications. Learning Java opens up your possibilities when coding helps you create the software or website you want.

The fact that Codecademy offers a Java course helps you to clearly define the field you want to work in, create new projects, and get support and help to the fullest without having to spend time searching for many paid websites.

Pros:

• Helps you build the core knowledge needed to learn Java and reinforce the skills needed to apply Java.
• There are no fees if just sign up to learn the basics.

Cons:

• Language restriction to English only.
• Does not provide lifetime access.

Website: www.codecademy.com

Udacity.com is an online learning platform that offers courses and programs in different areas of technology, such as web development, data science, machine learning, AI, Java, and more. Udacity.com also collaborates with successful people and industry partners to develop content and methods to help graduates find employment. Design Udacity courses are based on reality and approved projects.

Udacity.com offers a free course on Java programming basics called “Java Programming Basics”. This is a basic course that will help you get a solid foundation in the simple syntax of getting started in Java through variables and data types.

Another free course on the website offered by Udacity.com is “Object-Oriented Programming in Java”. This course aims to draw conclusions about which object will fit the given programming concepts and then who will be the right person to inherit and develop data sets through Java. More specifically, it will be the code and the simple requirements when starting to run Java.

Most of Udacity's courses won't offer a certificate if you sign up for free, but that's enough proof that Udacity has also helped create a website that gives you the basics without spending any money for a solid foundation.

Pros:

• Teaches you commands and functions.
• At the end of the course, you can develop your skills.
  

Cons:

• Not be offered an official degree or certification.

Website: https://www.udacity.com/

Udemy is a website that offers online courses with diverse knowledge from experts in different fields in partnership with Udemy. Udemy includes the Java course, a course taught by many people from many different angles. There are many free Java courses on Udemy. Some of the best Udemy courses offer: Java Beginners Tutorial: This course is designed for beginners to learn Java. It covers topics like variables, data types, loops, arrays, and more. And some more courses like Java Database Connectivity: JDBC and MySQL, Java Multithreading, Java Design Patterns, and Architecture, etc. Free courses rated 4.5 stars or higher with a viewership of over 10,000.

Thanks to the free online courses, many users have learned the basics of how to run Java programs, mastered the foundation for self-improvement, and can learn on their own without spending too much time and effort finding many reputable places to study. If you are interested in Udemy, please visit the link https://www.udemy.com/topic/java/free/ to quickly complete the free courses.

Pros:

• Various languages are used.
• Offers lifetime access to its courses.

Cons:

• Some courses are not of good quality.

Website: https://www.udemy.com/topic/java/free/

Coursera is one of the websites that offers many online courses and has Java programming in it. The Core Java Specialization from Coursera is one of the best advanced Java courses available, providing insight into Java programming and object-oriented programming.

If you are interested in building real applications and developing professional skills, then a Java object-oriented major is a great choice. Coursera has always provided learners with a structured learning experience. Courses are fully structured with video lectures, readings, quizzes, and projects.

Here are some popular free courses on Coursera for Java: Java Programming: Software Problems with Software, Object-Oriented Programming in Java, Java Programming Basics, Java Programming, and Software Engineering Fundamentals Free Java courses have a lot of people who consider and rate them quite highly, demonstrating the prestige that Coursera brings to learners with useful knowledge. You can find more information about these courses on Coursera by visiting their website.

Pros:

• Coursera is an online learning platform that offers a large catalog of courses.
• Free, lifetime access to courses.

Cons:

• Expenses to upgrade courses.
• Some courses are not accredited.

Website: https://www.coursera.org/

CodingBat.com is a free website with live coding problems for building coding skills in Java and Python. You can practice Java problems for free on CodingBat.com. Java programs need to have code to run properly, so CodingBat.com was created to provide you with hands-on lessons and examples of live lectures.

CodingBat.com helps you build practice bases for small code problems. You will probably make a lot of mistakes along the way, but they can be repeated many times, so the new CodingBat.com helps you solidify your coding skills in that area.

So if you make mistakes in the code running in Java, you should use CodingBat.com to correct the incorrect statements, help you grasp the quick, cost-effective practice steps, and bring effective knowledge to you. Please visit the link https://codingbat.com/java to update more new skills.

Pros:

• CodingBat.com is a free website that offers coding exercises and problems to help users learn and practice programming.

Cons:

• It costs extra to add more code to write.

Website: https://codingbat.com/java

W3Schools is a website that provides free online tutorials, references, and exercises in all major web languages including Java. The website gradually develops Java into a popular programming language with a reasonable teaching method.

W3Schools guides you from scratch with simple examples and guides you to professional references. W3Schools as a reference rather than a primary learning resource. Java is used in W3Schools to develop mobile apps, web apps, desktop apps, games, and more. W3Schools allows Java to work on different platforms (Windows, Mac, Linux, etc.)

Pros:

• Provides basic tutorials for your reference that better Java practice.
• The website interface is easy to use and friendly.

Cons:

• Only provide simple articles, so it's only for reference, not for learning to improve knowledge.

Website: https://www.w3schools.com/java/

Pluralsight is an online platform that offers online Java and coding courses. They have a variety of Java courses at different speeds, you can choose the one that's right for you to help you improve your Java skills even further. Pluralsight also offers a Java language fundamentals course that provides a complete understanding of the Java programming language. Please visit the link https://www.pluralsight.com/courses/java-fundamentals-language to start learning Java with Pluralsight.

Pros:

• Provides a complete platform to develop better Java programming skills.

Cons:

• The free period is short, want to learn more, you have to pay an extra fee.

Website: https://www.pluralsight.com/