Write a small application with a GUI that could be the basis of a larger application. Your application should accept a credit card number entered into a text field. When the user clicks an Accept button, you should check whether the number entered contains exactly 16 digits. If so, display the message Number accepted: as well as the card number in a label, and then clear the text field. If not, display the message Number rejected in the label. (Note: Credit card numbers have fancier format requirements that depend on the issuer of the card and are beyond the scope of this exercise.)
What will be an ideal response?
See the code in Exercise11.java, CreditCardWindow.java.
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