I need help with a problem using Java SE 8u181:

Internationaal standardumber mapping:

6.21 (Phone keypads) The international standard letterumber mapping for tele- phones is given in Programming number, given an uppercase letter, as follows: public static int getNumber (char uppercaseletter) Write a test program that prompts the user to enter a phone number as a string. The input number may contain letters. The program translates a letter (uppercase or lowercase) to a digit and leaves all other characters intact. Here are sample runs of the program: Enter a string: 1-800-Flowers Enter 1-800-3569377 Enter a string: 1800flowers -Enter 18003569377