Added Java™ Tutorials (#2255)

* Update free-programming-books.md

* Update free-programming-books.md

free-programming-books.md

@@ -1282,6 +1282,7 @@
 * [The Java EE7 Tutorial](https://docs.oracle.com/javaee/7/JEETT.pdf) (PDF)
 * [The Java Language Specification](http://docs.oracle.com/javase/specs/) - James Gosling, Bill Joy, Guy Steele, Gilad Bracha
 * [The Java Tutorial 4th Edition](http://download.oracle.com/javase/tutorial/) - Sharon Zakhour, Scott Hommel, Jacob Royal, Isaac Rabinovitch, Tom Risser, Mark Hoeber
+* [The Java Tutorials](https://docs.oracle.com/javase/tutorial/index.html)
 * [Think Java: How to Think Like a Computer Scientist](http://greenteapress.com/thinkapjava/) - Allen B. Downey
 * [Thinking in Java](http://www.mindview.net/Books/TIJ/)
 * [Welcome to Java for Python Programmers](http://interactivepython.org/runestone/static/java4python/index.html) - Brad Miller