I am actually trying to learn Java myself, so that I can get down to some Android and Ouya app development in the future.
Here are the sources I'm using:
This PDF version of a "for dummies" book (this one is great at explaining the basics of Java): https://docs.google.com/file/d/0B50L...FjcjIwU2M/edit
And this video-series: http://thenewboston.org/list.php?cat=31
And for Android development specifically: http://thenewboston.org/list.php?cat=6

I hope this helps