如下语句为何出错?
调试信息是
001
002
003
004
也即
User element = (User)(hdrenum.nextElement()); 出错了?(User类已定义,并且已经引用)
public Vector getOnlineUserList() {
System.out.println("001");
Vector uservec = new Vector();
System.out.println("002");
Enumeration hdrenum = usersTable_.elements();
System.out.println("003");
while (hdrenum.hasMoreElements()) {
System.out.println("004");
User element = (User)(hdrenum.nextElement()); System.out.println("005");
uservec.addElement(element);
}
System.out.println("006");
return uservec;
}