private   void  addButtons() {
		pnlButtons =  new  JPanel();

		pnlButtons.setLayout( new  BoxLayout(pnlButtons, BoxLayout.Y_AXIS));
		pnlButtons.setBackground(Color.GREEN);
		
		btnCarStock =  new  JButton("Kfz's bestand");
		btnCarStock.setEnabled(false);
		btnCarStock.setMnemonic('K');
		pnlButtons.add(btnCarStock);
		
		btnPersons = new JButton("Kunden/Liferanten");
		btnPersons.addActionListener(this);
		pnlButtons.add(btnPersons);
		btnPersons.setMnemonic('K');
		btnPersons.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent ev) {	
				Calypso.objMain.showPersons();
			}
			
		});
	
		btnWarehouse = new JButton("Wahrenhaus");
		btnWarehouse.addActionListener(this);
		btnWarehouse.setMnemonic('W');
		pnlButtons.add(btnWarehouse);
		
		btnDirectori = new JButton("Rechnungen");
		btnDirectori.addActionListener(this);
		btnPersons.setMnemonic('R');
		pnlButtons.add(btnDirectori);
		
		pnlButtons.add(Box.createVerticalStrut(20));
		
		btnNewCar = new JButton("Auto hinzufügen");
		btnNewCar.addActionListener(this);
		btnNewCar.setMnemonic('N');
		pnlButtons.add(btnNewCar);
		
		btnPlusMinus = new JButton("Plus/Minus");
		btnPlusMinus.addActionListener(this);
		btnPlusMinus.setMnemonic('P');
		pnlButtons.add(btnPlusMinus);
		
		pnlButtons.add(Box.createVerticalStrut( 440 ));
	
		add(pnlButtons);
	}