static protected String implode(Object[] obj) {
		
		String res;
		
		if(obj.length == 0) {
			res = "";
		} else {
			StringBuffer sb = new StringBuffer();
			sb.append(obj[0]);
			for(int i=1; i < obj.length; i++) {
				sb.append(", ");
				sb.append(obj[i]);
			}
			res = sb.toString();
		}
		
		return res;
	}