# Panel

## JPanel


* `add(Component)` / `add(Component,int)` / `add(Component,Object)` / `add(Component,Object,int)` / `add(String,Component)`
* `getComponentCount()`
* `getComponent(int)` / `getComponentAt(int,int)` / `getComponentAt(Point)` / `getComponents()`
* `remove(Component)` / `remove(int)` / `removeAll()`

* `getLayout()` / `setLayout(LayoutManager)`




## JRootPane
* Glass pane
* Layered pane
  * FRAME_CONTENT_LAYER : -30000
  * DEFAULT_LAYER : 0
  * PALETTE_LAYER : 100
  * MODAL_LAYER : 200
  * POPUP_LAYER : 300
  * DRAG_LAYER : 400
* Content pane
* JMenu bar


* `jFrame.getRootPane()`
* `SwingUtilities.getRootPane(Component)`
* `jComponent.getRootPane()`

* `getDefaultButton()` / `setDefaultButton(JButton)`

* `jFrame.getGlassPane()` / `jFrame.setGlassPane(Component)`
* `jFrame.getLayeredPane()` / `jFrame.setLayeredPane(Component)`
* `jFrame.getContentPane()` / `jFrame.setContentPane(Container)`
* `jFrame.getJMenuBar()` / `jFrame.setJMenuBar(JMenuBar)`


## JScrollPane

* `JScrollPane(Component)` / `JScrollPane(Component,int,int)` 


* `setviewportView(Component)`
* `getVerticalScrollBarPolicy()` / `setVerticalScrollBarPolicy(int)` : ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED | VERTICAL_SCROLLBAR_ALWAYS | VERTICAL_SCROLLBAR_NEVER
* `getHorizontalScrollBarPolicy()` / `setHorizontalScrollBarPolicy(int)` : ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED | HORIZONTAL_SCROLLBAR_ALWAYS | HORIZONTAL_SCROLLBAR_NEVER
* `getViewportBorder()` / `setViewportBorder(Border)`
* `isWheelScrollingEnabled()`

* `setRowHeaderView(Component)` / `setColumnHeaderView(Component)`
* `getCornet(String)` / `setCorner(String,Component)` : ScrollPaneConstants.UPPER_LEFT_CORNER | UPPER_RIGHT_CORNER | LOWER_LEFT_CORNER | LOWER_RIGHT_CORNER | LOWER_LEADING_CORNER | LOWER_TRAILING_CORNER | UPPER_LEADING_CORNER | UPPER_TRAILING_CORNER

### Scrollable

* `getScrollableUnitIncrement()` / `getScrollableBlockIncrement()`
* `getPreferredScrollableViewportSize()`
* `getScrollableTracksViewportWidth()` / `getScrollableTracksViewportHeight()`