public ButtonPanel() {
   int buttonPanelOrient = FlowLayout.CENTER;
   setLayout(new BorderLayout(0, 5));
   buttonPanelOrient = FlowLayout.CENTER;
   buttonPanel.setLayout(new FlowLayout(buttonPanelOrient));
   add(separator, "North");
   add(buttonPanel, "Center");
 }
 public Button add(String buttonLabel) {
   Button addMe = new Button(buttonLabel);
   buttonPanel.add(addMe);
   return addMe;
 }
 public void add(Button button) {
   buttonPanel.add(button);
 }