InetAddress类

import java.net.InetAddress;
import java.net.UnknownHostException;

public class InetAddressDemo {
     public static void main(String args[])throws UnknownHostException{
//    	 fun();
    	 fun_1();
     }
     public static void fun_1() throws UnknownHostException
        // 获取主机名IP地址
    	 InetAddress inet = InetAddress.getByName("www.baidu.cn");
    	 System.out.println(inet);
     }
     public static void fun() throws UnknownHostException{
        //获取本机的主机名和IP地址
    	 InetAddress inet = InetAddress.getLocalHost();
    	 System.out.println(inet);
       // 获取本机的IP地址
    	String add =  inet.getHostAddress();
       // 获取本机的主机名
    	String name = inet.getHostName();
    	System.out.println(add+"    "+name);
    			 
     }
}