Thread: Swing app gui optimization

Initially I had wrongly designed a swing app gui which used static methods in the main method.

Then I realised I could've done it better. I've designed a rough outline of the app which might be correct per se, but maybe not optimized. I also decided to make the app thread-safe.

Here's an outline:

public class MyApp {
	JMenuBar myMenuBar = null;
	JToolBar myToolBar = null;
	JMenuItem myMenuItem1 = null;
	JMenuItem myMenuItem2 = null;
	JPanel northPanel = null;
 
	public JPanel createNorthPanel() {
		northPanel = new JPanel();		
		northPanel.add(createMenuBar());
		northPanel.add(createToolBar());
		return northPanel;
	}
 
	// similarly, create 'west', 'center', 'east' and 'south' panels
 
	public JMenuItem createMenuItem(String text, char mnemonic, String keyStrokeRepresentation) {
		JMenuItem newMenuItem = new JMenuItem();
		// set respective properties...		
		return newMenuItem;
	}		
 
	public JMenuBar createMenuBar() {
		myMenuBar = new JMenuBar();		
		myMenuBar.add(myMenuItem1 = createMenuItem("MyMenuItem1", 'M', "control M"));	
		myMenuItem1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent actionEvent) {
				// take some action here...
			}
		}	
 
		// similarly, create other menu items		
		return myMenuBar;
    }
 
	public static void main(String args[]) {
		// implementing thread safety...
		Runnable runner = new Runnable() {
			public void run() {
				JFrame mainFrame = new JFrame();				
				MyApp appInstance = new MyApp();				
				mainFrame.add(appInstance.createNorthPanel(), BorderLayout.NORTH);
 
				// similarly, create 'west', 'center', east' and 'south' panels...
				mainFrame.add(appInstance.createWestPanel(), BorderLayout.WEST);
				mainFrame.add(appInstance.createCenterPanel(), BorderLayout.CENTER);				
				mainFrame.add(appInstance.createEastPanel(), BorderLayout.EAST);				
				mainFrame.add(appInstance.createSouthPanel(), BorderLayout.SOUTH);					
				mainFrame.setVisible(true);
				mainFrame.setSize(400, 300);
			}
		};		
		EventQueue.invokeLater(runner);
	}
}

Is everything all right with the code, or can it be better optimized? Plz overlook the length of the code. It's rather long, I admit. Thanks.