java.net.UnknownHostException：10.0.246.242

Question

我正在嘗試使用Telnet連接到主機，但是卻遇到了java.net.UnknownHostException：

這是代碼供您參考...。

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

堆棧跟蹤：-

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)

我正在嘗試使用Tenet連接到遠程系統，它具有三個接受主機ID，用戶名和密碼的文本框

當我在做Ping時：

`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

位於java.net.SocksSocketImpl.connect（SocksSocketImpl.java:366）的java.net.PlainSocketImpl.connect（PlainSocketImpl.java:177）

那表示Java無法創建主機的套接字，有關套接字的更多信息： http : //download.oracle.com/javase/1.4.2/docs/api/java/net/Socket.html

您是否嘗試使用PuTTY之類的東西遠程登錄服務器？ 在此處下載鏈接： http : //www.chiark.greenend.org.uk/~sgtatham/putty/download.html

編輯：未知主機異常表示未找到IP，它與telnet失敗無關。