Builds a CSV list from the specified two dimensional String[][], separator string and quote string. : CSV « File « Java Tutorial

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import java.lang.reflect.Array;

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/** Provides a collection of convenience methods for processing and
 * creating objects with <code>String</code> value components.
 *
 * @author Campbell Boucher-Burnett (boucherb@users dot sourceforge.net)
 * @author Fred Toussi (fredt@users dot sourceforge.net)
 * @author Nitin Chauhan
 * @version 1.9.0
 * @since 1.7.0
 */
public class Main {


  /**
   * Builds a CSV list from the specified String[][], separator string and
   * quote string. 
   *
   * <ul>
   * <li>All arguments are assumed to be non-null.
   * <li>Uses only the first element in each subarray.
   * <li>Separates each list element with the value of the
   * <code>separator</code> argument.
   * <li>Prepends and appends each element with the value of the
   *     <code>quote</code> argument.
   * <li> No attempt is made to escape the quote character sequence if it is
   *      found internal to a list element.
   * <ul>
   * @return a CSV list
   * @param separator the <code>String</code> to use as the list element separator
   * @param quote the <code>String</code> with which to quote the list elements
   * @param s the array of <code>String</code> array objects
   */
  public static String getList(String[][] s, String separator,
                               String quote) {

      int          len = s.length;
      StringBuffer sb   = new StringBuffer(len * 16);

      for (int i = 0; i < len; i++) {
          sb.append(quote);
          sb.append(s[i][0]);
          sb.append(quote);

          if (i + 1 < len) {
              sb.append(separator);
          }
      }

      return sb.toString();
  }

}