The calculator simply calculates the savings to be made if a user converts from traditional bulbs to energy efficient equivalents.
The user is presented with 2 rows. Both rows are pre loaded with 20W and 50W traditional bulbs on the very left hand side. These are non editable. The only editable fields for the user are the quantity and bulb usage.
The user currently enters these details via comboboxes but this can be changed if required. I selected the comboboxes for the java application just to avoid people entering illegal characters.
I have attached a screenshot of the applet and the (inefficient)java source code. All the java code is currently lumped into one class in an attempt to speed up applet load time.
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