- java.lang.Object
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- java.awt.Component
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- java.awt.Container
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- javax.swing.JComponent
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- javax.swing.JLabel
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- javax.swing.table.DefaultTableCellRenderer
 
 
 
 
 
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- All Implemented Interfaces:
- ImageObserver,- MenuContainer,- Serializable,- Accessible,- SwingConstants,- TableCellRenderer
 - Direct Known Subclasses:
- DefaultTableCellRenderer.UIResource
 
 public class DefaultTableCellRenderer extends JLabel implements TableCellRenderer, Serializable The standard class for rendering (displaying) individual cells in aJTable.Implementation Note: This class inherits from JLabel, a standard component class. HoweverJTableemploys a unique mechanism for rendering its cells and therefore requires some slightly modified behavior from its cell renderer. The table class defines a single cell renderer and uses it as a as a rubber-stamp for rendering all cells in the table; it renders the first cell, changes the contents of that cell renderer, shifts the origin to the new location, re-draws it, and so on. The standardJLabelcomponent was not designed to be used this way and we want to avoid triggering arevalidateeach time the cell is drawn. This would greatly decrease performance because therevalidatemessage would be passed up the hierarchy of the container to determine whether any other components would be affected. As the renderer is only parented for the lifetime of a painting operation we similarly want to avoid the overhead associated with walking the hierarchy for painting operations. So this class overrides thevalidate,invalidate,revalidate,repaint, andfirePropertyChangemethods to be no-ops and override theisOpaquemethod solely to improve performance. If you write your own renderer, please keep this performance consideration in mind.Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the java.beanspackage. Please seeXMLEncoder.- See Also:
- JTable, Serialized Form
 
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Nested Class SummaryNested Classes Modifier and Type Class Description static classDefaultTableCellRenderer.UIResourceA subclass ofDefaultTableCellRendererthat implementsUIResource.- 
Nested classes/interfaces declared in class javax.swing.JLabelJLabel.AccessibleJLabel
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Nested classes/interfaces declared in class javax.swing.JComponentJComponent.AccessibleJComponent
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Nested classes/interfaces declared in class java.awt.ContainerContainer.AccessibleAWTContainer
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Nested classes/interfaces declared in class java.awt.ComponentComponent.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy
 
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Field SummaryFields Modifier and Type Field Description protected static BordernoFocusBorderA border without focus.- 
Fields declared in class javax.swing.JComponentlistenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW
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Fields declared in class java.awt.ComponentaccessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT
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Fields declared in interface java.awt.image.ImageObserverABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH
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Fields declared in interface javax.swing.SwingConstantsBOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST
 
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Constructor SummaryConstructors Constructor Description DefaultTableCellRenderer()Creates a default table cell renderer.
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Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description voidfirePropertyChange(String propertyName, boolean oldValue, boolean newValue)Overridden for performance reasons.protected voidfirePropertyChange(String propertyName, Object oldValue, Object newValue)Overridden for performance reasons.ComponentgetTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)Returns the default table cell renderer.voidinvalidate()Overridden for performance reasons.booleanisOpaque()Overridden for performance reasons.voidrepaint()Overridden for performance reasons.voidrepaint(long tm, int x, int y, int width, int height)Overridden for performance reasons.voidrepaint(Rectangle r)Overridden for performance reasons.voidrevalidate()Overridden for performance reasons.voidsetBackground(Color c)OverridesJComponent.setBackgroundto assign the unselected-background color to the specified color.voidsetForeground(Color c)OverridesJComponent.setForegroundto assign the unselected-foreground color to the specified color.protected voidsetValue(Object value)Sets theStringobject for the cell being rendered tovalue.voidupdateUI()Notification from theUIManagerthat the look and feel [L&F] has changed.voidvalidate()Overridden for performance reasons.- 
Methods declared in class javax.swing.JLabelcheckHorizontalKey, checkVerticalKey, getAccessibleContext, getDisabledIcon, getDisplayedMnemonic, getDisplayedMnemonicIndex, getHorizontalAlignment, getHorizontalTextPosition, getIcon, getIconTextGap, getLabelFor, getText, getUI, getUIClassID, getVerticalAlignment, getVerticalTextPosition, imageUpdate, paramString, setDisabledIcon, setDisplayedMnemonic, setDisplayedMnemonic, setDisplayedMnemonicIndex, setHorizontalAlignment, setHorizontalTextPosition, setIcon, setIconTextGap, setLabelFor, setText, setUI, setVerticalAlignment, setVerticalTextPosition
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Methods declared in class javax.swing.JComponentaddAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, 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, 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, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update
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Methods declared in class java.awt.Containeradd, 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, 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, validateTree
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Methods declared in class java.awt.Componentaction, 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, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, 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, 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
 
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Field Detail- 
noFocusBorderprotected static Border noFocusBorder A border without focus.
 
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Method Detail- 
setForegroundpublic void setForeground(Color c) OverridesJComponent.setForegroundto assign the unselected-foreground color to the specified color.- Overrides:
- setForegroundin class- JComponent
- Parameters:
- c- set the foreground color to this value
- See Also:
- Component.getForeground()
 
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setBackgroundpublic void setBackground(Color c) OverridesJComponent.setBackgroundto assign the unselected-background color to the specified color.- Overrides:
- setBackgroundin class- JComponent
- Parameters:
- c- set the background color to this value
- See Also:
- Component.getBackground(),- JComponent.setOpaque(boolean)
 
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updateUIpublic void updateUI() Notification from theUIManagerthat the look and feel [L&F] has changed. Replaces the current UI object with the latest version from theUIManager.- Overrides:
- updateUIin class- JLabel
- See Also:
- JComponent.updateUI()
 
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getTableCellRendererComponentpublic Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) Returns the default table cell renderer.During a printing operation, this method will be called with isSelectedandhasFocusvalues offalseto prevent selection and focus from appearing in the printed output. To do other customization based on whether or not the table is being printed, check the return value fromJComponent.isPaintingForPrint().- Specified by:
- getTableCellRendererComponentin interface- TableCellRenderer
- Parameters:
- table- the- JTable
- value- the value to assign to the cell at- [row, column]
- isSelected- true if cell is selected
- hasFocus- true if cell has focus
- row- the row of the cell to render
- column- the column of the cell to render
- Returns:
- the default table cell renderer
- See Also:
- JComponent.isPaintingForPrint()
 
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isOpaquepublic boolean isOpaque() Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
- isOpaquein class- JComponent
- Returns:
- true if this component is completely opaque
- See Also:
- JComponent.setOpaque(boolean)
 
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invalidatepublic void invalidate() Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
- invalidatein class- Container
- Since:
- 1.5
- See Also:
- Container.validate(),- Container.layout(),- LayoutManager2
 
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validatepublic void validate() Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
- validatein class- Container
- See Also:
- Container.add(java.awt.Component),- Container.invalidate(),- Container.isValidateRoot(),- JComponent.revalidate(),- Container.validateTree()
 
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revalidatepublic void revalidate() Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
- revalidatein class- JComponent
- See Also:
- Component.invalidate(),- Container.validate(),- JComponent.isValidateRoot(),- RepaintManager.addInvalidComponent(javax.swing.JComponent)
 
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repaintpublic void repaint(long tm, int x, int y, int width, int height)Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
- repaintin class- JComponent
- Parameters:
- tm- this parameter is not used
- x- the x value of the dirty region
- y- the y value of the dirty region
- width- the width of the dirty region
- height- the height of the dirty region
- See Also:
- JComponent.isPaintingOrigin(),- Component.isShowing(),- RepaintManager.addDirtyRegion(javax.swing.JComponent, int, int, int, int)
 
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repaintpublic void repaint(Rectangle r) Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
- repaintin class- JComponent
- Parameters:
- r- a- Rectanglecontaining the dirty region
- See Also:
- JComponent.isPaintingOrigin(),- Component.isShowing(),- RepaintManager.addDirtyRegion(javax.swing.JComponent, int, int, int, int)
 
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repaintpublic void repaint() Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
- repaintin class- Component
- Since:
- 1.5
- See Also:
- Component.update(Graphics)
 
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firePropertyChangeprotected void firePropertyChange(String propertyName, Object oldValue, Object newValue) Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
- firePropertyChangein class- Component
- Parameters:
- propertyName- the property whose value has changed
- oldValue- the property's previous value
- newValue- the property's new value
 
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firePropertyChangepublic void firePropertyChange(String propertyName, boolean oldValue, boolean newValue) Overridden for performance reasons. See the Implementation Note for more information.- Overrides:
- firePropertyChangein class- JComponent
- Parameters:
- propertyName- the property whose value has changed
- oldValue- the property's previous value
- newValue- the property's new value
 
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setValueprotected void setValue(Object value) Sets theStringobject for the cell being rendered tovalue.- Parameters:
- value- the string value for this cell; if value is- nullit sets the text value to an empty string
- See Also:
- JLabel.setText(java.lang.String)
 
 
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