How to declare ftp in File class. I want to display filename of file in FTP

Question

How to declare ftp in File class. I want to display filename of file in FTP server.
I try
File f2= new File("ftp://abc:abc1111@ABC/file");
               String n[] = f2.list();
               System.out.print(n[0]);
               Vector filename = null ;
               for (int i2 = 0; i2 < n.length; i2++) {
                    filename.add(n[i2]);
but it is not work
Thank you.

Answer 1

You can use Jakarta's net-package to connect to a FTP server.
Download it here:
http://jakarta.apache.org/site/downloads/downloads_commons-net.cgi
Here's a small demo:
import org.apache.commons.net.ftp.*;
public class FTPTest {
    private boolean isConnected;
    private FTPClient client;
    public FTPTest() {
        isConnected = false;
        connect();
    private void connect() {
        String server = "server.org";
        String username = "user";
        String password = "password";
        client = new FTPClient();
        try {
            client.connect(server);
            client.login(username, password);
            String[] files = client.listNames();
            for(int i = 0; i < files.length; i++) {
                System.out.println(files);
isConnected = true;
disconnect();
catch(Exception e) {
e.printStackTrace();
private void disconnect() {
if(isConnected) {
try {
client.disconnect();
isConnected = false;
catch(Exception e) {
e.printStackTrace();
public static void main(String[] args) {
new FTPTest();