JAVA 网络编程（IP地址）

import java.net.*;

class IPDemo
{
public static void main(String []args) throws Exception
{
InetAddress i = InetAddress.getLocalHost();

sop(i.toString());//获取主机名 及 本地IP
sop("Address :"+i.getHostAddress());//获取本地IP
sop("HostName:"+i.getHostName());//获取主机名

//根据域名或IP 获取信息
InetAddress ia = InetAddress.getByName("www.baidu.com");
sop("+Address :"+ia.getHostAddress());
sop("+Name :" + ia.getHostName());

}

public static void sop(Object obj)
{
System.out.println(obj);
}
}