Added new resource under Java Programming language in free-programming-books-lang.md (#6355)

* Added DBMS resource in free-programming-books-langs.md file

* Corrected the issue in spacing

* Fixed further spacing issues and formatting

* Added resource under java language in free-programming-books-lang.md

* Added file extension(pdf)

books/free-programming-books-langs.md

@@ -1035,6 +1035,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
 * [Welcome to Java for Python Programmers](https://runestone.academy/runestone/books/published/java4python/index.html) - Brad Miller
 * [Welcome to the Java Workshop (2006)](http://javaworkshop.sourceforge.net) - Trevor Miller
 * [What’s New in Java 8](https://leanpub.com/whatsnewinjava8/read) - Adam L. Davis
+* [Writing Advanced Applications for the Java 2 Platform](http://www.pawlan.com/monica/books/AdvBk.pdf) - Calvin Austin and Monica Pawlan (PDF)
 
 
 #### Codename One