java.net.InetAddress类表示互联网协议 （IP） 地址。

    有两个子类：Inet4Address， Inet6Address

    通过 InetAddress可以方便获取一个域名下的IP，也可以获取一个IP的主机名。

    下面是例子，通过程序查看51cto主机的IP信息，51cto是不让ping的。

    代码：

import java.io.IOException; import java.net.InetAddress; public class TestInetAddress {         public static void main(String[] args) throws IOException {                 test();         }         public static void test() throws IOException {                 //获取本机的IP地址                 InetAddress address1 = InetAddress.getLocalHost();                 System.out.println(address1.getHostAddress());                 System.out.println(address1.toString());                 System.out.println("---------------");                 //获取51cot的IP地址                 InetAddress address2 = InetAddress.getByName("www.51cto.com");                 System.out.println("getHostAddress:\t" + address2.getHostAddress());                 System.out.println("getHostName:\t" + address2.getHostName());                 System.out.println("---------------");                 //获取我博客的IP地址                 InetAddress address3 = InetAddress.getByName("lavasoft.blog.51cto.com");                 System.out.println("getHostAddress:\t" + address3.getHostAddress());                 System.out.println("getHostName:\t" + address3.getHostName());                 //直接用ip地址构建                 System.out.println(InetAddress.getByName("211.103.156.224"));                 System.out.println("---------------");                 //获取www.google.com域名下所有的IP地址 //                InetAddress[] address4 = InetAddress.getAllByName("www.microsoft.com");                 InetAddress[] address4 = InetAddress.getAllByName("www.google.com");                 for (InetAddress address : address4) { //                                System.out.println(address.getHostAddress());                         System.out.println(address);                 }                 InetAddress address5 = InetAddress.getByName("211.103.156.229");                 System.out.println(address5.isReachable(10));         } }

    运行输出结果：

原文链接: http://java.chinaitlab.com/net/7...