will anybody be able to help me!:) :(

im trying to write a java program really simply using edit plus using things such as println,joptionpane etc to try and do:

Using appropriate techniques design implement and test a simple program that accepts a measurement in stone and pounds from the user, and outputs the measurement in metric.

You should ensure the smooth running of your program through effective use of error checking.

For this assignment you will also need to use the conversion factor between metric and imperial:
1 pound = 0.45359237 kilograms
1 stone = 14 pounds

The imperial input must be accepted in the form stone.pounds, e.g. 14 stone 3 pounds is 14.03.

Help anybody please!!:)