code: private void createButtons() {
          iconButton = new NoFocusButton("InternalFrameTitlePane.iconifyButtonAccessibleName");
          iconButton.addActionListener(iconifyAction);
  
          if (iconButtonToolTip != null && iconButtonToolTip.length() != 0) {
              iconButton.setToolTipText(iconButtonToolTip);
          }
  
          maxButton = new NoFocusButton("InternalFrameTitlePane.maximizeButtonAccessibleName");
          maxButton.addActionListener(maximizeAction);
  
          closeButton = new NoFocusButton("InternalFrameTitlePane.closeButtonAccessibleName");
          closeButton.addActionListener(closeAction);
  
          if (closeButtonToolTip != null && closeButtonToolTip.length() != 0) {
              closeButton.setToolTipText(closeButtonToolTip);
          }
  
          setButtonTooltips();
      }
docs: Create the buttons and add action listeners.