摘要:
先执行下面一段代码:public class Spooler { public string str = ""; private static bool instance_flag = false; public Spooler(string str) { instance_flag = true; } static Spooler() { } public static Spooler getSpooler() { if (!instance_flag) { return new Spooler(""); } else { return null; } 阅读全文
posted @ 2011-03-02 17:35 口渴的火麒麟 阅读(495) 评论(2) 推荐(0) 编辑