private void initMenuBar(){
		mMenuBar=new JMenuBar();
		//˵
		JMenu menuFile=new JMenu("File");
		JMenuItem menuItemExit=new JMenuItem("Exit");
		menuItemExit.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				System.exit(0);
			}
		});
		menuFile.add(menuItemExit);
		mMenuBar.add(menuFile);
		//ڲ˵
		JMenu menuAbout=new JMenu("Help");
		JMenuItem menuItemAbout=new JMenuItem("About");
		menuItemAbout.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				JOptionPane.showMessageDialog(null, "Author:  ֣ٶ\nE-mail: xcorpio@qq.com \nPhone: 15109221400", "About", JOptionPane.PLAIN_MESSAGE);
			}
		});
		menuAbout.add(menuItemAbout);
		mMenuBar.add(menuAbout);
		this.setJMenuBar(mMenuBar);
	}