Splitting emails by comma into array

Question

I would like to split emails by an a comma and put each email into an array. The problem I'm having is that I can't put each email into each index in the string array.

public string additionalEmails {get;set;}
String[] emailTestString = new string[]{};
emailTestString =  additionalEmails.split(',');

I believe the above splits the emails but then stores then all at index 0 (But i could be wrong)

I tried running a for each loop as follows:

        string[] strList = new string[]{};
        Integer i = 0;
        for( String str : emailTestString) 
        {
                strList[i] = str;
                i++;
        }

But it doesn't even enter the for each loop.

So if anyone can help me but each email into an array I would be very grateful.

Input:

Output when I display on screen:

As you can see it doesn't split by the comma.

Answer 1

The string split method is the right one to use and it returns an array of the values that lie between the supplied value. (Some values need escaping because of regular expression support but comma doesn't.)

But as this is user input, best to also filter out cases like two commas in a row or white space:

public string additionalEmails {get;set;}

String[] emailTestString = new String[] {};
for (String email : additionalEmails.split(',')) {
    String trimmed = email.trim();
    if (trimmed.length() > 0) emailTestString.add(trimmed);
}