KWBAGUI

import java.awt.BorderLayout;

public class KWBAGUI extends JFrame {

    /**
     *
     */
    private static final long serialVersionUID = 1L;
    private JPanel contentPane;
    private JMenuItem mntmRefresh;
    private JMenuItem mntmExit;
    private JMenu mnHelp;
    private JMenuItem mntmAbout;
    private JLabel label;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
        public void run() {
        try {
            KWBAGUI frame = new KWBAGUI();
            frame.setVisible(true);
        } catch (Exception e) {
            e.printStackTrace();
        }
        }
    });
    }

    /**
     * init stuff
     */
    public KWBAGUI() {
    initGUI();
    this.setVisible(true);
    }

    private void initGUI() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setBounds(100, 100, 900, 600);
    this.setTitle("");
    this.setResizable(false);
    JMenuBar menuBar = new JMenuBar();
    setJMenuBar(menuBar);

    JMenu mnFile = new JMenu("File");
    menuBar.add(mnFile);

    mntmRefresh = new JMenuItem("Refresh");
    mnFile.add(mntmRefresh);

    mntmExit = new JMenuItem("Exit");
    mnFile.add(mntmExit);

    mnHelp = new JMenu("Help");
    menuBar.add(mnHelp);

    mntmAbout = new JMenuItem("About");
    mnHelp.add(mntmAbout);
    contentPane = new JPanel();
    contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
    setContentPane(contentPane);
    contentPane.setLayout(new BorderLayout(0, 0));

    label = new JLabel("");
    label.setHorizontalAlignment(SwingConstants.CENTER);
    label.setIcon(new ImageIcon("res/weather.png"));
    contentPane.add(label);
    }

    public JMenuItem getMntmRefresh() {
        return mntmRefresh;
    }

    public JMenuItem getMntmExit() {
        return mntmExit;
    }

    public JMenu getMnHelp() {
        return mnHelp;
    }

    public JMenuItem getMntmAbout() {
        return mntmAbout;
    }

    public void refreshPicture() {
    this.label.setIcon(new ImageIcon("res/weather.png"));
    this.label.updateUI();
    }

    public void showHelp() {
    JOptionPane.showMessageDialog(this,"Some information.");
    }
}