Java Mapping

Hi All:

I have a scenario where I am want to use Java Mapping.

Input Data :

Fname

Mname

Lname

EmpNo

DOB

Output Data:

Employee (Only one filed with type Sting.)

With the help of Java Mapping I need to concatinate all the input fields and want to assign/map it in filed called Employee (singel target field)

Can any one let me konw what are the basics steps for it?

Thanks & Regards,

Farooq.