I can give you rough idea about this, I did this long back, I don't remeber fully How I did it, but you can get some clues from it.
You must be having JDBC driver installed when you install Oracle 817. File classes111.zip and classes12.zip contains JDBC driver, they are under Oracle Home/jdbc/lib directory. In your Java program you have to include these files and use the classes from this.

Again, this may not be fully correct.