Java Programming

I am trying to upload a file as well as want to download the uploaded file in my system....I don't have any server an all.
I want to implement this in my system only .
I got this code but i don't know ,where i have to make the change and what are the parameters i have to pass.
can any one help me on this code ....please
here some piece of code

File Upload and Download Code Example
package com.resource.util;


public class FileUpload
{
public void upload( String ftpServer, String user, String password,
String fileName, File source ) throws MalformedURLException,
IOException
{
if (ftpServer != null && fileName != null && source != null)
{
StringBuffer sb = new StringBuffer( "ftp://" );
// check for authentication else assume its anonymous access.
if (user != null && password != null)
{
sb.append( user );
sb.append( ':' );
sb.append( password );
sb.append( '@' );
}
sb.append( ftpServer );
sb.append( '/' );
sb.append( fileName );
/*
* type ==> a=ASCII mode, i=image (binary) mode, d= file directory
* listing
*/
sb.append( ";type=i" );

BufferedInputStream bis = null;
BufferedOutputStream bos = null;
try
{
URL url = new URL( sb.toString() );
URLConnection urlc = url.openConnection();

bos = new BufferedOutputStream( urlc.getOutputStream() );
bis = new BufferedInputStream( new FileInputStream( source ) );

int i;
// read byte by byte until end of stream
while ((i = bis.read()) != -1)
{
bos.write( i );
}
}
finally
{
if (bis != null)
try
{
bis.close();
}
catch (IOException ioe)
{
ioe.printStackTrace();
}
if (bos != null)
try
{
bos.close();
}
catch (IOException ioe)
{
ioe.printStackTrace();
}
}
}
else
{
System.out.println( "Input not available." );
}
}