import java.io.*;
import java.util.*;
import javax.microedition.io.file.*;
import javax.microedition.io.*;

public class fileSystem{


    public String[] List (String path)
throws IOException
    {
        Vector vFiles;
        if (path.equals("/"))
        {
            vFiles = new Vector ();
            Enumeration rootEnum =
FileSystemRegistry.listRoots();
            while (rootEnum.hasMoreElements())
            {
                String root =
(String)rootEnum.nextElement();
                vFiles.addElement(root);
            }
            String[] list =new
String[vFiles.size()];
            vFiles.copyInto(list);
            vFiles.removeAllElements();
            vFiles = null;
            return list;
        }
        else if (path.length() > 1)
        {
            vFiles = new Vector ();
            FileConnection fconn =(FileConnection)Connector.open("file://" + path);
            for(Enumeration e =fconn.list("*", false) ;
e.hasMoreElements() ;)
            {
                    vFiles.addElement(e.nextElement());
            }
            fconn.close();
            String[] list = new String[vFiles.size()];
            vFiles.copyInto(list);
            vFiles.removeAllElements();
            vFiles = null;
            return list;
        }
        else
        {
            throw new IOException("List() : invalid path"); 
        }
    }



}