Convert IP Address to Hostname using Java

InetAddress class

package app;

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

public class Main
{
    public static void main(String[] args) throws UnknownHostException
    {
        String ip = "8.8.8.8";
        InetAddress address = InetAddress.getByName(ip);
        String hostname = address.getHostName();

        System.out.println(hostname);
    }
}