JDBC using Function

Hi ,

I am searching a simple Code How to do Using Function
I have done a Stored Procedure using
CallableStatement
How to With Function ?

The same. An SQL Function is a CallableStatement too.
A Sample

Thanks m8 For The Link
What is The Difference between

catch (SQLException e) {
e.printStackTrace();

and

catch (SQLException e) {
System.out.println(e.getMessage());

printStackTrace() ?

e.printStackTrace(); will print the stack trace (from the call stack, that led to the exception)

System.out.println(e.getMessage()); will print the error message from the exception