如何在Java中确定路由器/网关的IP？

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;

public class GatewayIP {
    public static void main(String[] args) {
        try {
            Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
            while (networkInterfaces.hasMoreElements()) {
                NetworkInterface networkInterface = networkInterfaces.nextElement();
                Enumeration<InetAddress> inetAddresses = networkInterface.getInetAddresses();
                while (inetAddresses.hasMoreElements()) {
                    InetAddress inetAddress = inetAddresses.nextElement();
                    if (isGatewayAddress(inetAddress)) {
                        System.out.println("路由器/网关的IP地址: " + inetAddress.getHostAddress());
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static boolean isGatewayAddress(InetAddress inetAddress) {
        // 在这里添加您的路由器/网关IP地址的判断逻辑
        // 例如：
        // if (inetAddress.getHostAddress().equals("192.168.1.1")) {
        //     return true;
        // }
        return false;
    }
}