/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
   public static void main (String[] args) throws java.lang.Exception
   {
 
        String myCSV = "a,b";
        Pattern p = Pattern.compile("[^,]+(?=\\s*|\\s*$)");
        Matcher m = p.matcher(myCSV);
 
        while (m.find()) {
            System.out.println("Match found from: " + m.start() 
                               + " (included) to: " + m.end()+ " (excluded),"
                               + " matching:  '" + m.group() + "'. Does it hit end?"
                               + m.hitEnd());
        }
 
   }
}

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