public static ComponentUI createUI(JComponent c) 
{
        if(panelUI == null) {
            panelUI = new BasicPanelUI();
        }
        return panelUI;
}

 public int getBaseline(JComponent c,
    int width,
    int height) 
{
        super.getBaseline(c, width, height);
        Border border = c.getBorder();
        if (border instanceof AbstractBorder) {
            return ((AbstractBorder)border).getBaseline(c, width, height);
        }
        return -1;
}

Returns the baseline.

 public Component.BaselineResizeBehavior getBaselineResizeBehavior(JComponent c) 
{
        super.getBaselineResizeBehavior(c);
        Border border = c.getBorder();
        if (border instanceof AbstractBorder) {
            return ((AbstractBorder)border).getBaselineResizeBehavior(c);
        }
        return Component.BaselineResizeBehavior.OTHER;
}

Returns an enum indicating how the baseline of the component changes as the size changes.

 protected  void installDefaults(JPanel p) 
{
        LookAndFeel.installColorsAndFont(p,
                                         "Panel.background",
                                         "Panel.foreground",
                                         "Panel.font");
        LookAndFeel.installBorder(p,"Panel.border");
        LookAndFeel.installProperty(p, "opaque", Boolean.TRUE);
}

 public  void installUI(JComponent c) 
{
        JPanel p = (JPanel)c;
        super.installUI(p);
        installDefaults(p);
}

 protected  void uninstallDefaults(JPanel p) 
{
        LookAndFeel.uninstallBorder(p);
}

 public  void uninstallUI(JComponent c) 
{
        JPanel p = (JPanel)c;
        uninstallDefaults(p);
        super.uninstallUI(c);
}