javax.swing
类 JScrollPane.ScrollBar

java.lang.Object
  java.awt.Component
      java.awt.Container
          javax.swing.JComponent
              javax.swing.JScrollBar
                  javax.swing.JScrollPane.ScrollBar

所有已实现的接口：

Adjustable, ImageObserver, MenuContainer, Serializable, Accessible, UIResource

正在封闭类：

JScrollPane

protected class JScrollPane.ScrollBar
extends JScrollBar
implements UIResource

默认情况下，JScrollPane 创建的滚动条为此类的实例。Scrollbar 重写 getUnitIncrement 和 getBlockIncrement 方法，所以如果视口的视图为 Scrollable，会要求该视图计算这些值。除非显式设置了单位/块增量。

警告：此类的序列化对象将与以后的 Swing 版本不兼容。当前的序列化支持适用于短期存储或运行相同 Swing 版本的应用程序之间的 RMI。从 1.4 版本开始，已在 java.beans 包中添加了支持所有 JavaBeans^TM 长期存储的功能。请参阅 XMLEncoder。

另请参见：

Scrollable, JScrollPane.createVerticalScrollBar(), JScrollPane.createHorizontalScrollBar()

嵌套类摘要

从类 javax.swing.JScrollBar 继承的嵌套类/接口

JScrollBar.AccessibleJScrollBar

从类 javax.swing.JComponent 继承的嵌套类/接口

JComponent.AccessibleJComponent

从类 java.awt.Container 继承的嵌套类/接口

Container.AccessibleAWTContainer

从类 java.awt.Component 继承的嵌套类/接口

Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy

字段摘要

从类 javax.swing.JScrollBar 继承的字段

blockIncrement, model, orientation, unitIncrement

从类 javax.swing.JComponent 继承的字段

accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

从类 java.awt.Component 继承的字段

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

从接口 java.awt.Adjustable 继承的字段

HORIZONTAL, NO_ORIENTATION, VERTICAL

从接口 java.awt.image.ImageObserver 继承的字段

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

构造方法摘要

JScrollPane.ScrollBar(int orientation)
创建具有指定方向的滚动条。

方法摘要

int	getBlockIncrement(int direction) 如果视口中的视图为 Scrollable 对象，将计算滚动的块增量值。
int	getUnitIncrement(int direction) 如果视口中的视图为 Scrollable 对象，将计算滚动的单位增量值。
void	setBlockIncrement(int blockIncrement) 通知超类来设定该值，并将 blockIncrementSet 实例变量重置为 true。
void	setUnitIncrement(int unitIncrement) 通知超类来设定该值，并将 unitIncrementSet 实例变量重置为 true。

从类 javax.swing.JScrollBar 继承的方法

addAdjustmentListener, fireAdjustmentValueChanged, getAccessibleContext, getAdjustmentListeners, getBlockIncrement, getMaximum, getMaximumSize, getMinimum, getMinimumSize, getModel, getOrientation, getUI, getUIClassID, getUnitIncrement, getValue, getValueIsAdjusting, getVisibleAmount, paramString, removeAdjustmentListener, setEnabled, setMaximum, setMinimum, setModel, setOrientation, setUI, setValue, setValueIsAdjusting, setValues, setVisibleAmount, updateUI

从类 javax.swing.JComponent 继承的方法

addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, 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, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, 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, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

从类 java.awt.Container 继承的方法

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, transferFocusBackward, transferFocusDownCycle, validate, validateTree

从类 java.awt.Component 继承的方法

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, 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, getPeer, 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, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusUpCycle

从类 java.lang.Object 继承的方法

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

构造方法详细信息

JScrollPane.ScrollBar

public JScrollPane.ScrollBar(int orientation)

创建具有指定方向的滚动条。方向包括：

• ScrollPaneConstants.VERTICAL
• ScrollPaneConstants.HORIZONTAL

参数：

orientation - 指定上面两个合法方向值之一的整数

方法详细信息

setUnitIncrement

public void setUnitIncrement(int unitIncrement)

通知超类来设定该值，并将 unitIncrementSet 实例变量重置为 true。

指定者：

接口 Adjustable 中的 setUnitIncrement

覆盖：

类 JScrollBar 中的 setUnitIncrement

参数：

unitIncrement - 新单位增量值，以像素为单位

从以下版本开始：

1.4

另请参见：

JScrollBar.getUnitIncrement(int)

getUnitIncrement

public int getUnitIncrement(int direction)

如果视口中的视图为 Scrollable 对象，将计算滚动的单位增量值。否则返回 super.getUnitIncrement。

覆盖：

类 JScrollBar 中的 getUnitIncrement

参数：

direction - 小于零表示向上/左滚动，大于零表示向下/右滚动

返回：

包含单位增量的整数，以像素为单位

另请参见：

Scrollable.getScrollableUnitIncrement(java.awt.Rectangle, int, int)

setBlockIncrement

public void setBlockIncrement(int blockIncrement)

通知超类来设定该值，并将 blockIncrementSet 实例变量重置为 true。

指定者：

接口 Adjustable 中的 setBlockIncrement

覆盖：

类 JScrollBar 中的 setBlockIncrement

参数：

blockIncrement - 新的块增量值，以像素为单位

另请参见：

JScrollBar.getBlockIncrement()

getBlockIncrement

public int getBlockIncrement(int direction)

如果视口中的视图为 Scrollable 对象，将计算滚动的块增量值。否则 blockIncrement 与视口的宽度或高度相等。如果无任何视口，则返回 super.getBlockIncrement。

覆盖：

类 JScrollBar 中的 getBlockIncrement

参数：

direction - 小于零表示向上/向左滚动，大于零表示向下/向右滚动

返回：

包含块增量的整数，以像素为单位

另请参见：

Scrollable.getScrollableBlockIncrement(java.awt.Rectangle, int, int)