How to get hostname by pinging a IP Address Java in Android Studio

Hello everyone,
I'm making a IP Scanner app in Android Studio. I have successfully checked if a PC in my LAN is Alive or Dead. But I also want to show the PC name against the IP Address.

I searched on Internet and all the solutions I found just return me the IP Address but the hostname like.

Code:

---

InetAddress inetAddr;
    inetAddr = InetAddress.getByName(host.hostname);
    String hostname = inetAddr.getHostName();
    String canonicalHostname = inetAddr.getCanonicalHostName();

---

I also tried to execute ping -a [IP Address] in Android Terminal that also returns me IP Address not Host Name.

But If I do ping -a [My Local IP] than it returns local-host but for all other IP's it doesn't work.

This is also not a DNS issue as someone suggested on Stackoverflow, because on my windows 7 machine I'm able to resolve the hostname using ping -a [IP Address]

Both my windows machine and Android phone getting their IP from DHCP and all other settings like DNS, Gateway are same for both devices.

This was fairly easy in .Net as I have created a IP Scanner in .Net, but in Java I haven't found a solution for this yet.

Hope someone will provide a solution :)

Thanks

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