There are 2 useful classes in java to manipulate dates: java.util.Date and java.util.Calendar. Another useful class to format and parse string dates is java.text.SimpleDateFormat.

Here is a snippet that shows how to download a file in java. The snippet is tested and works just fine: static public void download(String address, String localFileName) throws MalformedURLException , FileNotFoundException , IOException { URL url = new URL(address); OutputStream out = new BufferedOutputStream( new FileOutputStream(localFileName)); URLConnection conn = url.openConnection(); InputStream in = conn.getInputStream(); [...]