Could this program easily be changed into other GUI program?

A good answer might be:

Yes---any program that uses a formula to calculate a result based on user input could be created by "hacking" upon this one. If you need more input values, add more TextFields and Labels.

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Obtaining numeric data from the user.
Complete temperature conversion application.
Design of the fat calculator.
Complete fat calculator program.
Using a doIt Button
Problems with picking the right frame size.

The next chapter will discuss more about component layout.

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