java访问权限的问题 java 访问权限 修饰符 背景: 关于java中的四种访问修饰符,public ,default ,protected ,private的作用范围本以为很熟悉了,但碰到了这样一段代码: package pac1; public class Parent { protected int i; protected class Inner{ } } package pac2; import pac1.Parent; public class Child extends Par
1. Linux 终端连接FTP [oracle@Dave ~]$ ftp 10.85.7.97 Connected to 10.85.7.97. 220 Serv-U FTP Server v6.4 for WinSock ready... 500 'AUTH': command not understood. 500 'AUTH': command not understood. KERBEROS_V4 rejected as an authentication type Name