Flight Deobfuscated Code

import java.awt.event.WindowEvent;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class Main {
    public static void main(String[] args) throws Exception {
        int sleep;
        while (true) {
            if (anyoneThere()) {
                sleep = infoBox()-1;
                while (sleep > 0) {
                    Thread.sleep(60 * 1000);
                    sleep--;
                }
            }
            Thread.sleep(60 * 1000);
        }
    }

    public static int infoBox()
    {
        boolean doneGood=false;
        int n=0;
        String[] options = {"OK"};
        do{
            try{
                JFrame frame = new JFrame();
                frame.setUndecorated( true );
                frame.setVisible( true );
                frame.setLocationRelativeTo( null );
                JPanel panel = new JPanel();
                JLabel lbl = new JLabel("Turn off this pop-up for how many minutes?");
                JTextField txt = new JTextField(10);
                panel.add(lbl);
                panel.add(txt);
                JOptionPane.showOptionDialog(frame, panel, "A player is playing FlightMC!", JOptionPane.NO_OPTION, JOptionPane.QUESTION_MESSAGE, null, options , options[0]);
                frame.dispatchEvent(new WindowEvent(frame, WindowEvent.WINDOW_CLOSING));
                n=Integer.parseInt(txt.getText());
                doneGood=true;
            }
            catch(Exception e){
                JOptionPane.showMessageDialog(null, "You don't like listening to instructions, do ya?");
            }
        }while(!doneGood);
        return n;
    }

    public static boolean anyoneThere() throws Exception {
        URL flight = new URL("http://198.27.90.130/flightmc/Flight");
        String inputLine;
        BufferedReader in = new BufferedReader(new InputStreamReader(
                flight.openStream()));
        while ((inputLine = in.readLine()) != null) {
            // System.out.println(inputLine);
            if (inputLine.contains("Online now!")) {
                return true;
            }
        }
        in.close();
        return false;
    }
}