Tokenize multiple String in array if the input sometimes doesn't have token

Question

I have input in this form

test@test.com

and\or in this form

test@test.com;test2@test.com

or

test@test.com;test2@test.com;test3@test.com

I should tokenize all, in a String array that contains only a single email for each cell without any separator

;

Answer 1

You don't want to tokenize, just use split:

String[] emails = { "test@test.com;test2@test.com;test3@test.com", "test@test.com"  };
List<string> result = new ArrayList<String>();

for ( string listOfEmails : emails ) {
  for( string email : listOfEmails.split(";") ) {
    result.Add(email).
  }
}

System.out.println(result);

And it will work for all cases.