Java tutorial
//package com.java2s; import java.util.List; public class Main { /** * Convert the list of Integers into a comma separated * string so that it's easy to load back in. * @param list * @return */ public static String toString(List<?> list) { StringBuffer buf = new StringBuffer(); for (Object o : list) buf.append(o + ","); buf.deleteCharAt(buf.length() - 1); return buf.toString(); } }