Oracle is a Database Management System... not much with software development.
But, out of all of them, Java is growing the fastest.
Then, as a good thing to help you in the future... if you are having trouble deciding which to learn... screw it and learn both, and forget the other if you never need to use it.
Web development is growing even faster though.
I am personally involved with many languages, including: Java, HTML, XHTML, CSS, JavaScript, XML, XML languages, Microsoft .NET(J# and C#), ASP.NET, PHP, SQL(MySQL), Adobe Flash, Ajax, and probably some others.
If you need help getting started in anything, feel free to email me because I know some useful things that may save you several thousand dollars.
Good luck!