java.lang.Object
- java.awt.Component
- - java.awt.Container
  - - javax.swing.JComponent
    - - javax.swing.JPanel

实现的所有接口

ImageObserver ， MenuContainer ， Serializable ， Accessible

已知直接子类：

AbstractColorChooserPanel ， JSpinner.DefaultEditor
```
@JavaBean(defaultProperty="UI",
          description="A generic lightweight container.")
public class JPanel
extends JComponent
implements Accessible
```
JPanel是一个通用的轻量级容器。有关JPanel的示例和面向任务的文档，请参阅“Java教程”中的 How to Use Panels部分。
警告： Swing不是线程安全的。有关更多信息，请参阅Swing's Threading Policy 。

警告：此类的序列化对象与以后的Swing版本不兼容。当前的序列化支持适用于运行相同版本Swing的应用程序之间的短期存储或RMI。从1.4开始， java.beans软件包中添加了对所有JavaBeans java.beans长期存储的支持。请参阅XMLEncoder 。

从以下版本开始：

1.2

另请参见：

Serialized Form

嵌套类汇总

嵌套类
变量和类型	类	描述
`protected class`	`JPanel.AccessibleJPanel`	此类实现 `JPanel`类的可访问性支持。

嵌套类/接口声明在类 javax.swing.JComponent
JComponent.AccessibleJComponent

嵌套类/接口声明在类 java.awt.Container
Container.AccessibleAWTContainer

嵌套类/接口声明在类 java.awt.Component
Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy

字段汇总
- 声明的属性在类 javax.swing.JComponent
  listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW
- 声明的属性在类 java.awt.Component
  accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT
- Fields declared in interface java.awt.image.ImageObserver
  ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

构造方法摘要

构造方法
构造器	描述
`JPanel()`	使用双缓冲区和流布局创建新的 `JPanel` 。
`JPanel(boolean isDoubleBuffered)`	使用 `FlowLayout`和指定的缓冲策略创建新的 `JPanel` 。
`JPanel(LayoutManager layout)`	使用指定的布局管理器创建新的缓冲JPanel
`JPanel(LayoutManager layout, boolean isDoubleBuffered)`	使用指定的布局管理器和缓冲策略创建新的JPanel。

方法摘要

所有方法实例方法具体的方法
变量和类型	方法	描述
`AccessibleContext`	`getAccessibleContext()`	获取与此JPanel关联的AccessibleContext。
`PanelUI`	`getUI()`	返回呈现此组件的外观（L＆F）对象。
`String`	`getUIClassID()`	返回一个字符串，该字符串指定呈现此组件的L＆F类的名称。
`protected String`	`paramString()`	返回此JPanel的字符串表示形式。
`void`	`setUI(PanelUI ui)`	设置呈现此组件的外观（L＆F）对象。
`void`	`updateUI()`	使用当前外观中的值重置UI属性。

声明方法的类 javax.swing.JComponent
addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

声明方法的类 java.awt.Container
add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusDownCycle, validate, validateTree

声明方法的类 java.awt.Component
action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setMixingCutoutShape, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

声明方法的类 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- 构造方法详细信息
  - JPanel
```
public JPanel(LayoutManager layout,
              boolean isDoubleBuffered)
```
    使用指定的布局管理器和缓冲策略创建新的JPanel。
    
    参数
    
    layout - 要使用的LayoutManager
    
    isDoubleBuffered - 布尔值，对于双缓冲为true，它使用额外的内存空间来实现快速，无闪烁的更新
  - JPanel
```
public JPanel(LayoutManager layout)
```
    使用指定的布局管理器创建新的缓冲JPanel
    
    参数
    
    layout - 要使用的LayoutManager
  - JPanel
```
public JPanel(boolean isDoubleBuffered)
```
    使用FlowLayout和指定的缓冲策略创建新的JPanel 。如果isDoubleBuffered为true，则JPanel将使用双缓冲区。
    
    参数
    
    isDoubleBuffered - 布尔值，对于双缓冲为true，它使用额外的内存空间来实现快速，无闪烁的更新
  - JPanel
```
public JPanel()
```
    使用双缓冲区和流布局创建新的 JPanel 。
- 方法详细信息
  - updateUI
```
public void updateUI()
```
    使用当前外观中的值重置UI属性。
    
    重写：
    
    updateUI在类 JComponent
    
    另请参见：
    
    JComponent.updateUI()
  - getUI
```
public PanelUI getUI()
```
    返回呈现此组件的外观（L＆F）对象。
    
    重写：
    
    getUI在类 JComponent
    
    结果
    
    呈现此组件的PanelUI对象
    
    从以下版本开始：
    
    1.4
  - setUI
```
@BeanProperty(hidden=true,
              visualUpdate=true,
              description="The UI object that implements the Component\'s LookAndFeel.")
public void setUI(PanelUI ui)
```
    设置呈现此组件的外观（L＆F）对象。
    
    参数
    
    ui - PanelUI L＆F对象
    
    从以下版本开始：
    
    1.4
    
    另请参见：
    
    UIDefaults.getUI(javax.swing.JComponent)
  - getUIClassID
```
@BeanProperty(bound=false,
              expert=true,
              description="A string that specifies the name of the L&F class.")
public String getUIClassID()
```
    返回一个字符串，该字符串指定呈现此组件的L＆F类的名称。
    
    重写：
    
    getUIClassID在类 JComponent
    
    结果
    
    “PanelUI Panel的”
    
    另请参见：
    
    JComponent.getUIClassID() ， UIDefaults.getUI(javax.swing.JComponent)
  - paramString
```
protected String paramString()
```
    返回此JPanel的字符串表示形式。此方法仅用于调试目的，返回字符串的内容和格式可能因实现而异。返回的字符串可能为空，但可能不是null 。
    
    重写：
    
    paramString在类 JComponent
    
    结果
    
    此JPanel的字符串表示形式。
  - getAccessibleContext
```
@BeanProperty(bound=false)
public AccessibleContext getAccessibleContext()
```
    获取与此JPanel关联的AccessibleContext。对于JPanel，AccessibleContext采用AccessibleJPanel的形式。如有必要，将创建一个新的AccessibleJPanel实例。
    
    Specified by:
    
    getAccessibleContext在界面 Accessible
    
    重写：
    
    getAccessibleContext ，类 Component
    
    结果
    
    一个AccessibleJPanel，用作此JPanel的AccessibleContext

Class JPanel

嵌套类汇总

嵌套类/接口声明在类 javax.swing.JComponent

嵌套类/接口声明在类 java.awt.Container

嵌套类/接口声明在类 java.awt.Component

字段汇总

声明的属性在类 javax.swing.JComponent

声明的属性在类 java.awt.Component

Fields declared in interface java.awt.image.ImageObserver

构造方法摘要

方法摘要

声明方法的类 javax.swing.JComponent

声明方法的类 java.awt.Container

声明方法的类 java.awt.Component

声明方法的类 java.lang.Object

构造方法详细信息

JPanel

JPanel

JPanel

JPanel

方法详细信息

updateUI

getUI

setUI

getUIClassID

paramString

getAccessibleContext