c14_4.java

这是java网络编程的8个比较典型的实例

import java.net.*;  //引入InetAddress类所在的包
  public class c14_4
   { public static void main(String args[])
      { try {
          if(args.length==1)
            {  //调用InetAddress类的静态方法，利用主机名创建对象
               InetAddress ipa=InetAddress.getByName(args[0]);
                System.out.println("Host name: "+ipa.getHostName());//获取主机名
                System.out.println("Host IP Address: "+ipa.toString());//获取IP地址 
                System.out.println("Local Host: "+InetAddress.getLocalHost( ));
               }  
              else
                System.out.println("输入一个主机名");
            }
       catch(UnknownHostException e)//创建InetAddress对象可能发生异常
           {   System.out.println(e.toString());    }
      }//end of main()
   }