Added screencasts about Java (#3970)

* Added two playlists about Java core and Spring

* Added Spring to index

free-podcasts-screencasts-ru.md

@@ -5,6 +5,8 @@
 * [Golang](#golang)
 * [Gulp](#gulp)
 * [Haskell](#haskell)
+* [Java](#java)
+  * [Spring](#spring)
 * [Javascript](#javascript)
 * [Node.js](#nodejs)
 * [PHP](#php)
@@ -42,6 +44,16 @@
 * [Бананы и Линзы](https://bananasandlenses.net)
 
 
+### Java
+
+* [Плейлист видео по Java для новичков](https://www.youtube.com/playlist?list=PLAma_mKffTOSUkXp26rgdnC0PicnmnDak)
+
+
+#### Spring
+
+* [Плейлист видео по Spring framework](https://www.youtube.com/playlist?list=PLAma_mKffTOR5o0WNHnY0mTjKxnCgSXrZ)
+
+
 ### Javascript
 
 * [Devschacht](https://soundcloud.com/devschacht) (Podcast)