Please help - JFrame, menu, another JFrame, setBackground

Question

I am trying to make a simple program that draws a JFrame with a menu. The menu has one item, which when selected draws another JFrame. That JFrame has a button, which when pressed changes the background color. Many hours have gone into this, despite the fact that I made a similar program a few weeks ago.
The compiler complains about the method getContentPane, when I remove that, it runs and draws the first window, but the menu item does not make the second window. Also, the setDefaultCloseOperation confuses the compiler as well.
Please help.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class MenuAction2
public static void main(String[] args) 
     MainWindow window = new MainWindow("Menu action example");
  //window.setDefaultCloseOperation.(JFrame.EXIT_ON_CLOSE);
     window.setVisible(true);      
class MainWindow extends JFrame
     MainWindow(String title)
     super(title);
     getContentPane.setLayout(new BorderLayout());
     Toolkit theKit = getToolkit();          
     Dimension wndSize = theKit.getScreenSize();  
     setBounds(0, 0,wndSize.width, wndSize.height);
     setJMenuBar(menuBar);
     fileMenu = new JMenu("File");
     connectItem = new JMenuItem();
     connectItem = fileMenu.add("Connect...");
     connectItem.addActionListener(menuHandler = new Handler());
     menuBar.add(fileMenu);
     getContentPane.add(toolBar, BorderLayout.NORTH);  
class Handler implements ActionListener
     public void actionPerformed(ActionEvent e)
      win = new ConnectWindow("Connect to Database");
      getContentPane().add(win, BorderLayout.NORTH);
      setVisible(true);
  private JMenu fileMenu;
  private JMenuItem connectItem;
  private JMenuBar menuBar = new JMenuBar(); 
  private JToolBar toolBar = new JToolBar();
  private Handler menuHandler;
  private ConnectWindow win;
class ConnectWindow extends JFrame
     ConnectWindow(String title)
          super(title);
          setSize(200,200);
          setLayout(new BorderLayout());
          JButton connectB = new JButton("Connect");
          connectB.addActionListener(new ActionListener()
               public void actionPerformed(ActionEvent e)
                    setBackground(Color.red);
          add(connectB,BorderLayout.SOUTH);
          setVisible(true);
}

Answer 1

getContentPane is a method so you should use it that way:
getContentPane().setLayout(new BorderLayout());
getContentPane.add(new Button("Ok"));