Update the Java topic overview

Better description, aliases, a better URL to point reader's to, and clarification of the existence of free and open source implementations.

Author: brunoborges

topics/java/index.md

@@ -1,13 +1,13 @@
 ---
-aliases: java-8, java8
+aliases: java-8, java8, java-11, java-11, JVM, JDK, OpenJDK, JavaSE, Java-SE
 created_by: James Gosling
 display_name: Java
 logo: java.png
 released: May 23, 1995
 short_description: Java is an object-oriented programming language used mainly for
-  desktop and mobile applications.
+  web, desktop, embedded devices and mobile applications.
 topic: java
-url: https://www.java.com/en/
+url: https://www.oracle.com/technetwork/java/javase/overview/index.html
 wikipedia_url: https://en.wikipedia.org/wiki/Java_(software_platform)
 ---
-Java was originally developed as an alternative to the C/C++ programming languages. It is now mainly used for building desktop, Android, and web server applications. Java is owned and licensed through Oracle.
+Java was originally developed as an alternative to the C/C++ programming languages. It is now mainly used for building web, desktop, mobile, and embedded applications. Java is owned and licensed through Oracle, with free and open source implementations available from Oracle and other vendors.