License number entering

i am subin.k.s, a final year MCA student , i want to know how can i create a license number entry form using java swing and store that license in windows registry using java.util.prefs.Preference class, so that when i run the application next time , it should check the registry for the previously entered license number and check whether it is valid.also the license entering form should appear only once.

also i want to know how can i access the system unique parameters (like Hard disk number, processor number, etc...).

i want these much information to create a license/registration number entry form and attach it to my application.

i badly need a solution for this problem.

[705 byte] By [subin.k.sa] at [2007-9-23]