Java. Connect to server using FTPClient class

Question

I try to connect using FTPClient class. This code runs perfectly:

client.connect("172.20.5.131");

But I can not connect when ip address looks like -1406991772. How can I sole this?

Thank you very much!

possible duplicate of [Java: convert int to InetAddress](http://stackoverflow.com/questions/1957637/java-convert-int-to-inetaddress) — Scary Wombat, Jul 02 '14 at 08:24

score 2 · Accepted Answer · answered Jul 02 '14 at 08:26

2

To do so, First you have to convert the integer value of IP-Address into a valid IP-Address using InetAddress#getByAddress(byte[]) :

int ipAddress = -1406991772;
byte[] bytes = BigInteger.valueOf(ipAddress).toByteArray();
String address = InetAddress.getByAddress(bytes).getHostAddress();

and then pass the address to client.connect(address);

answered Jul 02 '14 at 08:26

earthmover

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Ankit Lamba, but my `ipAddress` is not integer, it is String. How can I convert it? – user3649515 Jul 02 '14 at 08:34
sorry for late response, using `Integer.parseInt(ip_address)` – earthmover Jul 02 '14 at 09:45

Java. Connect to server using FTPClient class

1 Answers1