Java: splitting a comma-separated string but ignoring commas in parentheses

Question

I have a string like this:

one,two,3,(4,five),six,(seven),(8,9,ten),eleven,(twelve,13,14,fifteen)

the above string should split into:

Answer 1

here you go... :)

import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;

/**
 *
 * @author S1LENT W@RRIOR
 */
public class Tokenizer {

    public static void main(String... args) {

        List tokens = new ArrayList(); // List to store tokens

        String string = "one,two,3,(4,five),six,(seven),(8,9,ten),eleven,(twelve,13,14,fifteen)"; // input string
        StringTokenizer tokenizer = new StringTokenizer(string, "(),", true); // tokenize your string on the basis of these parentheses 

        while (tokenizer.hasMoreElements()) { // iterate over tokens

            String aToken = (String) tokenizer.nextElement(); // get a token

            if (aToken.equals("(")) { // if token is the begining of a parenthisis
                StringBuilder sb = new StringBuilder(aToken);
                String nextToken = (String) tokenizer.nextElement(); // get next token
                while (!nextToken.equals(")")) { // iterate over next tokens untill you find the ending bracket
                    sb.append(nextToken);
                    nextToken = (String) tokenizer.nextElement();
                }
                sb.append(")");

                tokens.add(sb.toString()); // add to tokens list
            } else if(aToken.equals(",")) { // need this to avoid adding commas
                // do nothing
            } else {
                tokens.add(aToken); // add to tokens list
            }
        }

        for(String aToken: tokens) { // print all tokens
            System.out.println(aToken);
        }
    }
}