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-EQAGT6K3/192.168.200.1String hostAddress = localHost.getHostAddress();System.out.println(hostAddress);//192.168.200.1System.out.println(localHost.getHostName());//LAPTOP-EQAGT6K3InetAddress byName = Inet6Address.getByName("www.baidu.com");System.out.println(byName);//www.baidu.com/163.177.151.109System.out.println(byName.getHostAddress());//163.177.151.109System.out.println(Inet6Address.getByName("LAPTOP-EQAGT6K3"));//LAPTOP-		EQAGT6K3/192.168.200.1System.out.println(Inet6Address.getByName("LAPTOP-EQAGT6K3").getHostAddress());//192.168.200.1}
}

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