获取主机地址IPv4的三种方式

<>需求：获取本机主机地址，通过域名获取服务器主机地址，通过主机名获取主机地址
package cn.itsp; import java.net.Inet6Address; import java.net.InetAddress;
import java.net.UnknownHostException; public class InetAddressDemo { public
static void main(String[] args) throws UnknownHostException { InetAddress
localHost = Inet6Address.getLocalHost();
System.out.println(localHost);//LAPTOP-EQAGT6K3/192.168.200.1 String
hostAddress = localHost.getHostAddress();
System.out.println(hostAddress);//192.168.200.1
System.out.println(localHost.getHostName());//LAPTOP-EQAGT6K3 InetAddress
byName = Inet6Address.getByName("www.baidu.com");
System.out.println(byName);//www.baidu.com/163.177.151.109
System.out.println(byName.getHostAddress());//163.177.151.109
System.out.println(Inet6Address.getByName("LAPTOP-EQAGT6K3"));//LAPTOP-
EQAGT6K3/192.168.200.1
System.out.println(Inet6Address.getByName("LAPTOP-EQAGT6K3").getHostAddress());//192.168.200.1
} }

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