How to split a string into a multiple parts from a common character ?

We may need to split a string into multiple parts from common characters to store it in a set which can be used later for comparison. 

I came across one scenario  like ,I was getting some string which was containing three parts separated by ":"  and I had to compare with custom settings record, I was not sure which part of the string will be match with custom settings record. So I split the string and stored in the set.

Below is some sample code:-

String s = 'Another Person : ChildLine Volunteer Administrator : None';

String s2;

set<String> set_string = new set<String>();

while(s.contains(':')){

s2 = s.substring(0,s.indexof(':')+1);

set_string.add(s2.substring(0,s2.length()-1));

s = s.remove(s2);

}

set_string.add(s);

System.debug('Printing---set_string '+set_string);

Keep learning and sharing...