New to Java

OK im writing an FTP server/client and it works great...If the client only downloads one file. Heres the code that sends the file

public void sendFile(String dir, Socket sock2)
	{
		try
		{
			BufferedOutputStream send = new BufferedOutputStream(sock2.getOutputStream());
			try
			{
				File g = new File(dir);
				System.out.println(g.getPath());
				FileInputStream in = new FileInputStream(g);
				int c=0;
				while((c = in.read()) != -1)
				{
					send.write(c);
				}
				send.close();
				System.out.println("File Sent");
			}
			catch (IOException err) {}
		}
		catch (IOException err) {System.out.println(err);}
	}

It sends the first file then closes the socket to complete the transfer (Otherwise file never finishes sendind) then when it gets called again it dosnt reopen the socket. I am now thinking I need to look into supporting mulitple clients. but basicly How to I reopen the Socket to send another File?