如何获得已安装打印机的列表？

只是想添加一些片段：

import javax.print.*;class Test {    public static void main (String [] args)    {        PrintService[] printServices = PrintServiceLookup.lookupPrintServices(null, null);        System.out.println("Number of print services: " + printServices.length);        for (PrintService printer : printServices) System.out.println("Printer: " + printer.getName());     }}