The international standard letter/number mapping found on the telephone is show

Question

The international standard letter/number mapping found on the telephone is show below:
1 2 3
ABC DEF
4 5 6
GHI JKL MNO
7 8 9
PQRS TUV WXYZ
0
Write a method that returns a 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 (upper- or lowercase) to a digit and leaves all other characters intact. Here is a sample run of the program:

Enter a string: 1-800-Flowers
1-800-3569377
or
Enter a string:1800Flowers
18003569377

Explanation / Answer

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