查詢本機IP

import java.net.*;

public class LookIP {
   public static void main(String[] args){
      try{
         InetAddress host = InetAddress.getLocalHost();
         System.out.println("網域名稱: " + host.getHostName());
         System.out.println("IP位址: " + host.getHostAddress());
      }catch(Exception e){
         e.printStackTrace();
      }
   }
}