Get machine name from IP

public static void main(String[] args) throws Exception {
    String addr = getMachineNameFromIP("192.168.1.159");
    System.out.println(addr);
}

static String getMachineNameFromIP(String ipAddr) {
    try {
        InetAddress i = InetAddress.getByName(ipAddr);
        return i.getHostName();
    } catch (UnknownHostException e) {
        e.printStackTrace();
        return "NULL";
    }
}