JTextField not correctly updating
connectButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            statusBar.setText("Connecting...");
            }
        }
    });

connectButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            Class.forName("com.mysql.jdbc.Driver");
            statusBar.setText("Connecting...");
            connection = DriverManager.getConnection("jdbc:mysql://" + database);
            }
        }
    });

connectButton.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent e) {
    statusBar.setText("Connecting...");

    new SwingWorker<Void, Void>() {
      protected Void doInBackground() {
        // Called on a background thread.
        connectToDatabase();
        return null;
      }

      protected void done() {
        // Called on Event Dispatch thread once connect routine has completed.
        try {
          get(); // Propagate any exceptions back to Event Dispatch thread.
        } catch (Exception ex) {
          ex.printStackTrace();
          JOptionPane.showMessageDialog(null,
            "Failed to connect: " + ex.getMessage(),
            "Error",
            JOptionPane.ERROR_MESSAGE);
        }
      }
    }.execute();
  }
});