Chapter 12, Problem 12.8PE

Program Plan Intro

Program to throw the HexFormatException exception

Program plan:

• Import the required packages into the program.
  • Create a class Exercise12_08 to throw the HexFormatException exception.
  • In the main() method,
    • Call hex2Dec() method to convert the hexadecimal to decimal value by passing the hexa value.
  • In hexa2Dec() method,
    • Declare variable.
    • The for Loop executes until the length of hexadecimal value. If yes,
      • Convert the hexadecimal value to decimal value
      • Return the converted value.
  • In convertHexToDec() method,
    • Check whether the character is "A". If yes,
      • Return the value 10.
    • Check whether the character is "B". If yes,
      • Return the value 11.
    • Check whether the character is "C". If yes,
      • Return the value 12.
    • Check whether the character is "D". If yes,
      • Return the value 13.
    • Check whether the character is "E". If yes,
      • Return the value 14.
    • Check whether the character is "F". If yes,
      • Return the value 15.
    • Check whether the character between “9” and “0”. If yes,
      • Return the value.
    • Otherwise, throw an exception.
  • Create a class HexFormatException to throw the HexFormatException exception.