> In November 2006, Sun open-sources Java.
>In November 2007, Sun approves Google's use of Java in Android.
> April of 2009, Oracle Corp. announced that it would be acquiring Sun
Subsequently Oracle figured it could get some money from Google by requiring a license fee
http://www.zdnet.com/article/the-real-history-of-java-and-an...
It gets more complicted though, see http://www.zdnet.com/article/the-real-history-of-java-and-an... and a bunch of other stuff