Telephone Keypad

In one class "TelephoneKeypad" create an application that models a telephone keypad.

  • The first number in the number cannot be 0. If the user types 0 as the first number, do nothing with it.
  • Format the number using dashes, as follows:
    • 1-000-000-0000 if the first digit entered is a 1.
    • (000) 000-0000 if ten digits are entered.
    • 000-0000 if seven digits are entered.
    • Do not accept extra digits.
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