01-InetAddress常用方法

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

public class Demo01_初识IP {
    public static void main(String[] args) throws UnknownHostException {
        //获取本机IP地址
        System.out.println(InetAddress.getLocalHost());
        System.out.println(InetAddress.getByName("localhost"));
        System.out.println(InetAddress.getByName("127.0.0.1"));
        //按名称获取地址
        InetAddress baidu = InetAddress.getByName("www.baidu.com");
        System.out.println(InetAddress.getByName("www.zhangzhixi.com"));
        System.out.println(InetAddress.getByName("www.jd.com"));

        //常用方法
        System.out.println(baidu.getAddress());//获取字节
        System.out.println(baidu.getCanonicalHostName());//规范主机名
        System.out.println(InetAddress.getByName("www.zhangzhixi.com").getCanonicalHostName());
        System.out.println(baidu.getHostAddress());//主机IP
        System.out.println(baidu.getHostName());//域名
    }
}

 zhixi/192.168.137.1
localhost/127.0.0.1
/127.0.0.1
www.zhangzhixi.com/3.223.115.185
www.jd.com/111.6.187.131
[B@74a14482
39.156.66.18
ec2-3-223-115-185.compute-1.amazonaws.com
39.156.66.18
www.baidu.com