How to automate GUI by adding drag and drop feature

Hi all, I have to automate a GUI.Here is small example of what i should do.

I have list of animal names like
TIGER
LION
HORSE
ELEPHANT.

I have to select particular animal name and add in to my work space by using something like pick and drop so that the name which i have selected gets copied to my work space. There are two columns in GUI, one column containing animal list and other column will be my work space. Can anyone tell me how to do it or the procedure to do it. I have to use XML and JAVA.
Urgent help required.

I think this has to do with Java interface programming and nothing with XML?
XML is mostly a dataset of information, you can see it as a flat file database format.

@JapyDooge: I have to use Java and Xml to get output i.e the list of features in GUI format.