Question

我正在尝试使用Telnet连接到主机，但我收到 java.net.UnknownHostException：

以下是供您参考的代码....

public AutomatedTelnetClient(String server, String user, String password) throws IOException {
   try {
      telnet.connect(server, 23);
   } catch (Exception e) { 
      e.printStackTrace(); 
   }  
}

STACK TRACE： -

java.net.UnknownHostException: 10.0.246.242 at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:177)at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)at java.net.Socket.connect(Socket.java:525)at org.apache.commons.net.SocketClient.connect(SocketClient.java:176)at connect.AutomatedTelnetClient.<init>(AutomatedTelnetClient.java:25)at Connect.AutomatedTelnetClient.test(AutomatedTelnetClient.java:113)at TelnetConnetct.jButton1ActionPerformed(TelnetConnetct.java:110)at TelnetConnetct.access$000(TelnetConnetct.java:20)at TelnetConnetct$1.actionPerformed(TelnetConnetct.java:55)at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)at java.awt.Component.processMouseEvent(Component.java:6263)at javax.swing.JComponent.processMouseEvent(JComponent.java:3255)at java.awt.Component.processEvent(Component.java:6028) at java.awt.Container.processEvent(Container.java:2041) at java.awt.Component.dispatchEventImpl(Component.java:4630) at java.awt.Container.dispatchEventImpl(Container.java:2099) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168) at java.awt.Container.dispatchEventImpl(Container.java:2085) at java.awt.Window.dispatchEventImpl(Window.java:2475) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

我正在尝试使用Tenet连接到远程系统有三个接受主机ID，用户名和密码的文本框

当我在做Ping时：

`Ping statistics for 10.0.246.242:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),Approximate round trip times in milli-seconds:Minimum = 0ms, Maximum = 17ms, Average = 4mshere`

Answer 1

java.net.SocksSocketImpl.connect（PlainSocketImpl.java:177）at java.net.SocksSocketImpl.connect（SocksSocketImpl.java:366）

这表示Java无法为主机创建套接字，有关套接字的更多信息：http://download.oracle.com/javase/1.4.2/docs/api/java/net/Socket.html

您是否尝试使用PuTTY之类的东西telnet到服务器？在这里下载链接： http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html

编辑：未知的主机异常意味着找不到IP，它与telnet失败无关。

java.net.UnknownHostException：10.0.246.242

1 个答案: