String Last Name
Write a function called lastName
.
It should take a single String
argument containing a name formatted like:
- "Challen,Chuchu"
- or, "Challen, Chuchu "
- or, " Challen , Chuchu"
That is, the last name first, followed by a comma, and then the first name, but each possibly surrounding by
whitespace. In all cases above you should return "Challen", the last name. If the passed String
is null
, you
should return null
. Otherwise the string will have two comma-separated parts as shown above.
You may find the String
methods split
and trim
useful.