Java Tutorials

Java is a computer programming language. It is a general-purpose, object-oriented, portable, secure and platform-independent language. It is intended to let application developers "write once, run anywhere" (WORA), meaning that compiled Java code can run on all platforms that support Java without the need for recompilation. It was initiated in 1991 by James Gosling, Mike Sheridan, and Patric Naughton. Java was initially called Oak after an Oak tree. Later it named as Java.
There are 8 free resources given below. I have given the link, please follow the like. Happy Learning.

Udemy.com

One of my favorite destinations of learning Java is Udemy.com, it is one of the largest and biggest online learning platforms in the world. There are several courses on this portal paid and free. It has many Java courses paid and free.

Oracle Java Tutorial

This is one of the most versatile and fully covered Java tutorials by Oracle's own site. You can find very comprehensive and detail Java materials with all the technical details. Here you will get the Basic concepts to advance the concept of Java material.

Learn Java

This website contains a very well-organized Java tutorial. It contains Basic to advance Java. One of the very good features of this site is that it has an interactive Run environment. Here you will study and Run the code and grasp the concept very easily.

edX

This is another well organize Java material. Learn to program in Java, one of the most widely used software programming languages in the world. Get an introduction to Java with free online courses from top universities and institutions including Microsoft, UC3M, and HKUST.

Here you will learn Basic to advanced Java with self-paced learning material prepared by the experts. Deeper learning in the Java platform includes Java cloud platform, Java Runtime Environment (JRE), Java SE (Java Standard Edition), Java EE (Java Enterprise Edition), Java ME (Java Micro Edition), Java card technology, JDK (Java development kit), Netbeans (an integrated development environment for Java), Java VM (Java Virtual Machine), Java API's, connecting to a MySQL database with Java, Java versions (such as Java 8), and more. There are lots to learn, but a Java course or tutorial on edX can help you master these concepts.

YouTube

Everybody knows the richness of this video-sharing site. You will get every kind of knowledge from here and get benefited. Here you will get Java learning materials from basic to advance from different YouTube channels.

Javatpoint

This is another very good website to learn java. This is also my favorite java learning site. This site contains a large number of Java learning materials as well as other computer language materials. This is one of the best for learning basic concepts to advance the concept of programming languages I have found on the internet.

TutorialsPoint

This website also contain the best study materials of Java as well as different computer science subjects in details. This is website is run by talented professionals. This website was launched by AMU alumni, Mr. Mohtashim, with a single tutorial on HTML in the year 2006.

Skillshare

Skillshare is an online learning community with thousands of classes in design, business, tech, and more. This site contains very good Java learning material ranging from basic to advance of different expert Java trainers.