Hi all, currently i can download only one file from the server, how do i download all the remaining files i want automatically using Java codes??

import java.io.*;

import java.net.URL;
import java.net.URLConnection;
import java.io.FileOutputStream;


public class ftp {

public static void main(String[] args) {

    try{

URL url =     new URL("ftp://ftp.wwpdb.org//pub//pdb//data//structures//all//pdb//pdb100d.ent.gz;type=d");
URLConnection con = url.openConnection();

BufferedInputStream in =     new BufferedInputStream(con.getInputStream());
FileOutputStream out =     new FileOutputStream("C:\\Users\\Royston\\Documents\\FTP downloads\\pdb100d.ent.gz");

int i = 0;
byte[] bytesIn = new byte[1024];

while ((i = in.read(bytesIn)) >= 0)
 {
out.write(bytesIn, 0, i);
 }
out.close();
in.close();
    } catch(Exception e)
        {
        e.printStackTrace();
        }    
    }   
}