Question

I get a problem about returning phone keypads.
For instance, if I input 1-80-0Apple, it will return 1-80-027753.
Could somebody tell me how to figure out this one?

Answer 1

If you are going to deal with different formats for phone numbers entered by users I would suggest that you use Google’s libphonenumber (http://code.google.com/p/libphonenumber/). It has lots of utilities for handling phone numbers.

For the case that you ask, you can do this:

String phoneNumber = PhoneNumberUtil.convertAlphaCharactersInNumber("1-80-0Apple");
System.out.println(phoneNumber);

That would print:

1-80-027753