https://www.runoob.com/java/net-localip.html

以下实例演示了如何使用 InetAddress 类的 getLocalAddress() 方法获取本机ip地址及主机名：

Main.java 文件

import java.net.InetAddress;

public class Main {
   public static void main(String[] args)
   throws Exception {
      InetAddress inetAddress = InetAddress.getLocalHost();
      System.out.println("Local HostAddress:
      "+addr.getHostAddress());
      String hostname = inetAddress.getHostName();
      System.out.println("Local host name: "+hostname);
   }
}

以上代码运行输出结果为：

Local HostAddress: 192.168.1.4
Local host name: harsh