Thread: is this mutlithreaded?

Well I wrote single threaded server and then I followed a tutorial on how to make something multithreaded but to me it seems like I am just calling stuff through a lot of different methods and has not done anything to help.

heres my code:

package server;
 
import java.net.*;
import java.io.*;
 
import server.writeFiles.Writer;
 
public class Server implements Runnable {
 
	static int port = 5555;
	static ServerSocket server;
	static Socket client;
	static DataInputStream in;
	public static String message1;
	public static String message2;
 
	public static void main(String[] args) throws IOException {
		Server s = new Server();
		s.run();
	}
 
	@Override
	public void run() {
		try {
			while (true) {
				try {
					startServer();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				Thread.sleep(1000L);
			}
		} catch (InterruptedException iex) {
		}
	}
 
	public void startServer() throws IOException {
		server = new ServerSocket(port);
		System.out.println("Starting server on port " + port);
		while (true) {
			client = server.accept();
			System.out.println("Connection");
			in = new DataInputStream(client.getInputStream());
			message1 = in.readUTF();
			System.out.println("Recived:" + message1);
			message2 = in.readUTF();
			System.out.println("Recived:" + message2);
			Writer.writeFile();
		}
	}
 
}

So my question is. Is this mutlithreaded? Can it handle multiple connections at once?