How to detect multiple white spaces?

Question

Hi,
I am working on an assignment where I have to read from a file and initialize the fields of my graph based on the input.
My problem is determining the input to be assigned to some field with some rule on the input file.
The input file will consist of 2 city names and the distance between them.
- Zero or more space is allowed to preceed the first city name
- one or more space between first city and second city, - - one or more space between first city and distance.
Example:
San Diego Boston 150
So I have to assign city1 = San Diego
city2 = Boston
distance = 150
I tried to do it with string tokenizer and string manipulation(like indexOf() and length()) but it does not seem to be working.
Any help will be appreciated.
Thanks!

Answer 1

Sorry for the added ugliness, but this works:import java.util.regex.*;
public class Test
    public static void main(String[] args)
        String s = "    'San Diego' Boston    123   ";
        Matcher m = Pattern.compile("('[^']*')|([^ ']+)").matcher(s);
        while(m.find())
            String g = m.group(1);
            if(g == null)
                System.out.println(m.group(2));
            else
                System.out.println(s.substring(m.start() + 1, m.end() - 1));
}I'm still a bit new to regex ;) None of this is probably helpful to you if you don't have 1.4, but at least I'm having fun :D