public static ComponentUI createUI(JComponent c) 
{
                       
        return new SynthEditorPaneUI();
}

Creates a UI for the JTextPane.

 public SynthContext getContext(JComponent c) 
{
        return getContext(c, getComponentState(c));
}

 protected  void installDefaults() 
{
        // Installs the text cursor on the component
        super.installDefaults();
        JComponent c = getComponent();
        Object clientProperty =
            c.getClientProperty(JEditorPane.HONOR_DISPLAY_PROPERTIES);
        if (clientProperty == null
            || clientProperty == localFalse) {
            c.putClientProperty(JEditorPane.HONOR_DISPLAY_PROPERTIES,
                                localTrue);
        }
        updateStyle((JTextComponent)getComponent());
}

 protected  void paint(SynthContext context,
    Graphics g) 
{
        super.paint(g, getComponent());
}

 protected  void paintBackground(Graphics g) 
{
        // Overriden to do nothing, all our painting is done from update/paint.
}

  void paintBackground(SynthContext context,
    Graphics g,
    JComponent c) 
{
        context.getPainter().paintEditorPaneBackground(context, g, 0, 0,
                                                  c.getWidth(), c.getHeight());
}

 public  void paintBorder(SynthContext context,
    Graphics g,
    int x,
    int y,
    int w,
    int h) 
{
        context.getPainter().paintEditorPaneBorder(context, g, x, y, w, h);
}

 protected  void propertyChange(PropertyChangeEvent evt) 
{
        if (SynthLookAndFeel.shouldUpdateStyle(evt)) {
            updateStyle((JTextComponent)evt.getSource());
        }
        super.propertyChange(evt);
}

This method gets called when a bound property is changed on the associated JTextComponent. This is a hook which UI implementations may change to reflect how the UI displays bound properties of JTextComponent subclasses. This is implemented to rebuild the ActionMap based upon an EditorKit change.

 protected  void uninstallDefaults() 
{
        SynthContext context = getContext(getComponent(), ENABLED);
        JComponent c = getComponent();
        c.putClientProperty("caretAspectRatio", null);
        style.uninstallDefaults(context);
        context.dispose();
        style = null;
        Object clientProperty =
            c.getClientProperty(JEditorPane.HONOR_DISPLAY_PROPERTIES);
        if (clientProperty == localTrue) {
            getComponent().putClientProperty(JEditorPane.HONOR_DISPLAY_PROPERTIES,
                                             Boolean.FALSE);
        }
        super.uninstallDefaults();
}

 public  void update(Graphics g,
    JComponent c) 
{
        SynthContext context = getContext(c);
        SynthLookAndFeel.update(context, g);
        paintBackground(context, g, c);
        paint(context, g);
        context.dispose();
}