JAVA中InetAddress.getByName("ip").getHostName();获取的主机名为什么多了后缀.lan?

运行结果如下，本地主机名是XXl，但获取的是XXL.lan；获取的ip地址无误

这是代码：

package Pers.Pluto.Day26;

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

public class InetAddressDemo {
    public static void main(String[] args) throws UnknownHostException {
        InetAddress address = null;  //主机名或者ip地址

        // address = InetAddress.getByName("XXL");
        // address = InetAddress.getLocalHost();
        address = InetAddress.getByName("192.168.1.136");

        String name = address.getHostName();        //获取主机名
        String hostAddress = address.getHostAddress();     //获取本地ip

        System.out.println("主机名：" + name + "\r\n" + "ip：" + hostAddress);


    }
}

运行结果如下，本地主机名是XXl，但获取的是XXL.lan