Introduction to Java
Java is a programming language and computing platform first released by Sun Microsystems in 1995. It has evolved from humble beginnings to power a large share of today's digital world, by providing the reliable platform upon which many services and applications are built. New, innovative products and digital services designed for the future continue to rely on Java, as well.
Getting Started with Java
The first step you need to know is that the Java code you are writing is saved in plain text files. In this tutorial, your application will be written in a single text file. Larger applications may require thousands of such files. Java is an object-oriented language. If this technical term does not mean anything to you, do not worry, all you need to remember at this point is that all the code you write must be held in a Java class. A Java class is created by a special declaration in a text file. Just copy the following code and paste it in your text editor. Congratulation! You have created your first Java class!
Best Free resources to learn java
first you should know something about java
Road Map
you can follow this link and start your journey. If you are doing first time programming then you should focus on introduction part after that you can follow the video link given below
After completing this videos series you can study opps concept in java
And also you can follow college wallah YouTube channel or website . here you can find best free video of java and Assignment as well.
If you are learning java for Android development than these are the topics you should complete