Stanford Java course link (#4252)

* Stanford Java course link

* put the new link alphabetically

free-courses-en.md

@@ -256,6 +256,7 @@
 ### Java
 
 * [Central Connecticut State University, Introduction to CS Using Java](http://chortle.ccsu.edu/CS151/cs151java.html)
+* [CS106A - Programming Methodology](https://see.stanford.edu/Course/CS106A) - (Stanford)
 * [Introduction to Java](http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-092-introduction-to-programming-in-java-january-iap-2010/)
 * [Java for Complete Beginners](http://courses.caveofprogramming.com/courses/java-for-complete-beginners)
 * [Java for Mobile Devices - Introducing Codename One](https://codenameone.teachable.com/p/java-for-mobile-devices-introducing-codename-one)