Add Java content (#2682)

* Update readme.md

* Update content/roadmaps/110-java/content/readme.md

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

content/roadmaps/110-java/content/readme.md

@@ -1 +1,16 @@
-# 
+<DedicatedRoadmap
+  href='/java'
+  title='Java Roadmap'
+  description='Click to check the detailed Java Roadmap.'
+/>
+
+# Java
+
+Java is a general-purpose language, primarily used for Internet-based applications.
+It was created in 1995 by James Gosling at Sun Microsystems and is one of the most popular options for backend developers.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='blue' badgeText='Official Website' href='https://www.java.com/'>Java Website</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.codecademy.com/learn/learn-java'>Codeacademy - Free Course</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.w3schools.com/java/'>W3 Schools Tutorials</BadgeLink>
+<BadgeLink badgeText='Watch' href='https://www.youtube.com/watch?v=eIrMbAQSU34'>Java Crash Course</BadgeLink>