背景

Java 通过计算机名获取 IP 地址；或者通过 IP 地址获取计算机名。

实现

package itheima;

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

public class InetAddressDemo {
    public static void main(String[] args) throws UnknownHostException {
        InetAddress address = InetAddress.getByName("HostNameOrIP"); // 此处可以是计算机名或者IP，任一即可

        String name = address.getHostName();
        String ip = address.getHostAddress();

        System.out.println("主机名:" + name);
        System.out.println("IP地址：" + ip);
    }
}