javax.swing.plaf.metal

## Class MetalTabbedPaneUI

- java.lang.Object
- - javax.swing.plaf.ComponentUI
  - - javax.swing.plaf.TabbedPaneUI
    - - javax.swing.plaf.basic.BasicTabbedPaneUI
      - - javax.swing.plaf.metal.MetalTabbedPaneUI

- All Implemented Interfaces:
    SwingConstants

      public class MetalTabbedPaneUI
      extends BasicTabbedPaneUI

  The Metal subclass of BasicTabbedPaneUI.

  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.beans` package. Please see `XMLEncoder`.

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class | Description
    --- | --- | ---
    `class` | `MetalTabbedPaneUI.TabbedPaneLayout` | This class should be treated as a "protected" inner class.

    - ### Nested classes/interfaces inherited from class javax.swing.plaf.basic.BasicTabbedPaneUI

      `BasicTabbedPaneUI.FocusHandler, BasicTabbedPaneUI.MouseHandler, BasicTabbedPaneUI.PropertyChangeHandler, BasicTabbedPaneUI.TabSelectionHandler`

  - ### Field Summary

    Fields
    Modifier and Type | Field | Description
    --- | --- | ---
    `protected int` | `minTabWidth` |
    `protected Color` | `selectColor` |
    `protected Color` | `selectHighlight` |
    `protected Color` | `tabAreaBackground` |

    - ### Fields inherited from class javax.swing.plaf.basic.BasicTabbedPaneUI

      `calcRect, contentBorderInsets, darkShadow, downKey, focus, focusListener, highlight, leftKey, lightHighlight, maxTabHeight, maxTabWidth, mouseListener, propertyChangeListener, rects, rightKey, runCount, selectedRun, selectedTabPadInsets, shadow, tabAreaInsets, tabChangeListener, tabInsets, tabPane, tabRunOverlay, tabRuns, textIconGap, upKey`

    - ### Fields inherited from interface javax.swing.SwingConstants

      `BOTTOM, CENTER, EAST, HORIZONTAL, LEADING, LEFT, NEXT, NORTH, NORTH_EAST, NORTH_WEST, PREVIOUS, RIGHT, SOUTH, SOUTH_EAST, SOUTH_WEST, TOP, TRAILING, VERTICAL, WEST`

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `MetalTabbedPaneUI()` |

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `protected int` | `calculateMaxTabHeight(int tabPlacement)` |
    `protected LayoutManager` | `createLayoutManager()` | Invoked by `installUI` to create a layout manager object to manage the `JTabbedPane`.
    `static ComponentUI` | `createUI(JComponent x)` |
    `protected int` | `getBaselineOffset()` | Returns the amount the baseline is offset by.
    `protected Color` | `getColorForGap(int currentRun, int x, int y)` |
    `protected int` | `getTabLabelShiftX(int tabPlacement, int tabIndex, boolean isSelected)` | Overridden to do nothing for the Java L&F.
    `protected int` | `getTabLabelShiftY(int tabPlacement, int tabIndex, boolean isSelected)` | Overridden to do nothing for the Java L&F.
    `protected int` | `getTabRunOverlay(int tabPlacement)` |
    `protected void` | `installDefaults()` |
    `void` | `paint(Graphics g, JComponent c)` | Paints the specified component appropriately for the look and feel.
    `protected void` | `paintBottomTabBorder(int tabIndex, Graphics g, int x, int y, int w, int h, int btm, int rght, boolean isSelected)` |
    `protected void` | `paintContentBorderBottomEdge(Graphics g, int tabPlacement, int selectedIndex, int x, int y, int w, int h)` |
    `protected void` | `paintContentBorderLeftEdge(Graphics g, int tabPlacement, int selectedIndex, int x, int y, int w, int h)` |
    `protected void` | `paintContentBorderRightEdge(Graphics g, int tabPlacement, int selectedIndex, int x, int y, int w, int h)` |
    `protected void` | `paintContentBorderTopEdge(Graphics g, int tabPlacement, int selectedIndex, int x, int y, int w, int h)` |
    `protected void` | `paintFocusIndicator(Graphics g, int tabPlacement, Rectangle[] rects, int tabIndex, Rectangle iconRect, Rectangle textRect, boolean isSelected)` |
    `protected void` | `paintHighlightBelowTab()` |
    `protected void` | `paintLeftTabBorder(int tabIndex, Graphics g, int x, int y, int w, int h, int btm, int rght, boolean isSelected)` |
    `protected void` | `paintRightTabBorder(int tabIndex, Graphics g, int x, int y, int w, int h, int btm, int rght, boolean isSelected)` |
    `protected void` | `paintTabBackground(Graphics g, int tabPlacement, int tabIndex, int x, int y, int w, int h, boolean isSelected)` |
    `protected void` | `paintTabBorder(Graphics g, int tabPlacement, int tabIndex, int x, int y, int w, int h, boolean isSelected)` | this function draws the border around each tab note that this function does now draw the background of the tab.
    `protected void` | `paintTopTabBorder(int tabIndex, Graphics g, int x, int y, int w, int h, int btm, int rght, boolean isSelected)` |
    `protected boolean` | `shouldFillGap(int currentRun, int tabIndex, int x, int y)` |
    `protected boolean` | `shouldPadTabRun(int tabPlacement, int run)` |
    `protected boolean` | `shouldRotateTabRuns(int tabPlacement, int selectedRun)` |
    `void` | `update(Graphics g, JComponent c)` | Notifies this UI delegate that it is time to paint the specified component.

    - ### Methods inherited from class javax.swing.plaf.basic.BasicTabbedPaneUI

      `assureRectsCreated, calculateMaxTabWidth, calculateTabAreaHeight, calculateTabAreaWidth, calculateTabHeight, calculateTabWidth, createChangeListener, createFocusListener, createMouseListener, createPropertyChangeListener, createScrollButton, expandTabRunsArray, getBaseline, getBaseline, getBaselineResizeBehavior, getContentBorderInsets, getFocusIndex, getFontMetrics, getIconForTab, getMaximumSize, getMinimumSize, getNextTabIndex, getNextTabIndexInRun, getNextTabRun, getPreviousTabIndex, getPreviousTabIndexInRun, getPreviousTabRun, getRolloverTab, getRunForTab, getSelectedTabPadInsets, getTabAreaInsets, getTabBounds, getTabBounds, getTabInsets, getTabRunCount, getTabRunIndent, getTabRunOffset, getTextViewForTab, getVisibleComponent, installComponents, installKeyboardActions, installListeners, installUI, lastTabInRun, layoutLabel, navigateSelectedTab, paintContentBorder, paintIcon, paintTab, paintTabArea, paintText, rotateInsets, selectAdjacentRunTab, selectNextTab, selectNextTabInRun, selectPreviousTab, selectPreviousTabInRun, setRolloverTab, setVisibleComponent, shouldRotateTabRuns, tabForCoordinate, uninstallComponents, uninstallDefaults, uninstallKeyboardActions, uninstallListeners, uninstallUI`

    - ### Methods inherited from class javax.swing.plaf.ComponentUI

      `contains, getAccessibleChild, getAccessibleChildrenCount, getPreferredSize`

    - ### Methods inherited from class java.lang.Object

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

- - ### Field Detail

    - #### minTabWidth

          protected int minTabWidth

    - #### tabAreaBackground

          protected Color tabAreaBackground

    - #### selectColor

          protected Color selectColor

    - #### selectHighlight

          protected Color selectHighlight

  - ### Constructor Detail

    - #### MetalTabbedPaneUI

          public MetalTabbedPaneUI()

  - ### Method Detail

    - #### createUI

          public static ComponentUI createUI(JComponent x)

    - #### createLayoutManager

          protected LayoutManager createLayoutManager()

      Description copied from class: `BasicTabbedPaneUI`
      Invoked by `installUI` to create a layout manager object to manage the `JTabbedPane`.
      Overrides:
        `createLayoutManager` in class `BasicTabbedPaneUI`
      Returns:
        a layout manager object
      See Also:
        `BasicTabbedPaneUI.TabbedPaneLayout`, `JTabbedPane.getTabLayoutPolicy()`

    - #### installDefaults

          protected void installDefaults()

      Overrides:
        `installDefaults` in class `BasicTabbedPaneUI`

    - #### paintTabBorder

          protected void paintTabBorder(Graphics g,
                                        int tabPlacement,
                                        int tabIndex,
                                        int x,
                                        int y,
                                        int w,
                                        int h,
                                        boolean isSelected)

      Description copied from class: `BasicTabbedPaneUI`
      this function draws the border around each tab note that this function does now draw the background of the tab. that is done elsewhere
      Overrides:
        `paintTabBorder` in class `BasicTabbedPaneUI`

    - #### paintTopTabBorder

          protected void paintTopTabBorder(int tabIndex,
                                           Graphics g,
                                           int x,
                                           int y,
                                           int w,
                                           int h,
                                           int btm,
                                           int rght,
                                           boolean isSelected)

    - #### shouldFillGap

          protected boolean shouldFillGap(int currentRun,
                                          int tabIndex,
                                          int x,
                                          int y)

    - #### getColorForGap

          protected Color getColorForGap(int currentRun,
                                         int x,
                                         int y)

    - #### paintLeftTabBorder

          protected void paintLeftTabBorder(int tabIndex,
                                            Graphics g,
                                            int x,
                                            int y,
                                            int w,
                                            int h,
                                            int btm,
                                            int rght,
                                            boolean isSelected)

    - #### paintBottomTabBorder

          protected void paintBottomTabBorder(int tabIndex,
                                              Graphics g,
                                              int x,
                                              int y,
                                              int w,
                                              int h,
                                              int btm,
                                              int rght,
                                              boolean isSelected)

    - #### paintRightTabBorder

          protected void paintRightTabBorder(int tabIndex,
                                             Graphics g,
                                             int x,
                                             int y,
                                             int w,
                                             int h,
                                             int btm,
                                             int rght,
                                             boolean isSelected)

    - #### update

          public void update(Graphics g,
                             JComponent c)

      Description copied from class: `ComponentUI`
      Notifies this UI delegate that it is time to paint the specified component. This method is invoked by `JComponent` when the specified component is being painted.

      By default this method fills the specified component with its background color if its `opaque` property is `true`, and then immediately calls `paint`. In general this method need not be overridden by subclasses; all look-and-feel rendering code should reside in the `paint` method.

      Overrides:
        `update` in class `ComponentUI`
      Parameters:
        `g` - the `Graphics` context in which to paint
        `c` - the component being painted; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
      See Also:
        `ComponentUI.paint(java.awt.Graphics, javax.swing.JComponent)`, `JComponent.paintComponent(java.awt.Graphics)`

    - #### paintTabBackground

          protected void paintTabBackground(Graphics g,
                                            int tabPlacement,
                                            int tabIndex,
                                            int x,
                                            int y,
                                            int w,
                                            int h,
                                            boolean isSelected)

      Overrides:
        `paintTabBackground` in class `BasicTabbedPaneUI`

    - #### getTabLabelShiftX

          protected int getTabLabelShiftX(int tabPlacement,
                                          int tabIndex,
                                          boolean isSelected)

      Overridden to do nothing for the Java L&F.
      Overrides:
        `getTabLabelShiftX` in class `BasicTabbedPaneUI`

    - #### getTabLabelShiftY

          protected int getTabLabelShiftY(int tabPlacement,
                                          int tabIndex,
                                          boolean isSelected)

      Overridden to do nothing for the Java L&F.
      Overrides:
        `getTabLabelShiftY` in class `BasicTabbedPaneUI`

    - #### getBaselineOffset

          protected int getBaselineOffset()

      Returns the amount the baseline is offset by. This is typically the same as `getTabLabelShiftY`.
      Overrides:
        `getBaselineOffset` in class `BasicTabbedPaneUI`
      Returns:
        amount to offset the baseline by
      Since:
        1.6

    - #### paint

          public void paint(Graphics g,
                            JComponent c)

      Description copied from class: `ComponentUI`
      Paints the specified component appropriately for the look and feel. This method is invoked from the `ComponentUI.update` method when the specified component is being painted. Subclasses should override this method and use the specified `Graphics` object to render the content of the component.
      Overrides:
        `paint` in class `BasicTabbedPaneUI`
      Parameters:
        `g` - the `Graphics` context in which to paint
        `c` - the component being painted; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
      See Also:
        `ComponentUI.update(java.awt.Graphics, javax.swing.JComponent)`

    - #### paintHighlightBelowTab

          protected void paintHighlightBelowTab()

    - #### paintFocusIndicator

          protected void paintFocusIndicator(Graphics g,
                                             int tabPlacement,
                                             Rectangle[] rects,
                                             int tabIndex,
                                             Rectangle iconRect,
                                             Rectangle textRect,
                                             boolean isSelected)

      Overrides:
        `paintFocusIndicator` in class `BasicTabbedPaneUI`

    - #### paintContentBorderTopEdge

          protected void paintContentBorderTopEdge(Graphics g,
                                                   int tabPlacement,
                                                   int selectedIndex,
                                                   int x,
                                                   int y,
                                                   int w,
                                                   int h)

      Overrides:
        `paintContentBorderTopEdge` in class `BasicTabbedPaneUI`

    - #### paintContentBorderBottomEdge

          protected void paintContentBorderBottomEdge(Graphics g,
                                                      int tabPlacement,
                                                      int selectedIndex,
                                                      int x,
                                                      int y,
                                                      int w,
                                                      int h)

      Overrides:
        `paintContentBorderBottomEdge` in class `BasicTabbedPaneUI`

    - #### paintContentBorderLeftEdge

          protected void paintContentBorderLeftEdge(Graphics g,
                                                    int tabPlacement,
                                                    int selectedIndex,
                                                    int x,
                                                    int y,
                                                    int w,
                                                    int h)

      Overrides:
        `paintContentBorderLeftEdge` in class `BasicTabbedPaneUI`

    - #### paintContentBorderRightEdge

          protected void paintContentBorderRightEdge(Graphics g,
                                                     int tabPlacement,
                                                     int selectedIndex,
                                                     int x,
                                                     int y,
                                                     int w,
                                                     int h)

      Overrides:
        `paintContentBorderRightEdge` in class `BasicTabbedPaneUI`

    - #### calculateMaxTabHeight

          protected int calculateMaxTabHeight(int tabPlacement)

      Overrides:
        `calculateMaxTabHeight` in class `BasicTabbedPaneUI`

    - #### getTabRunOverlay

          protected int getTabRunOverlay(int tabPlacement)

      Overrides:
        `getTabRunOverlay` in class `BasicTabbedPaneUI`

    - #### shouldRotateTabRuns

          protected boolean shouldRotateTabRuns(int tabPlacement,
                                                int selectedRun)

    - #### shouldPadTabRun

          protected boolean shouldPadTabRun(int tabPlacement,
                                            int run)

      Overrides:
        `shouldPadTabRun` in class `BasicTabbedPaneUI`

Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2026, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.