# Class JToolBar

java.lang.Object
java.awt.Component
java.awt.Container
javax.swing.JComponent
javax.swing.JToolBar

All Implemented Interfaces:
  `ImageObserver, MenuContainer, Serializable, Accessible, SwingConstants`

@JavaBean(defaultProperty="UI", description="A component which displays commonly used controls or Actions.") public class JToolBar extends JComponent implements SwingConstants, Accessible
`JToolBar` provides a component that is useful for displaying commonly used `Action`s or controls. For examples and information on using tool bars see How to Use Tool Bars, a section in The Java Tutorial.

With most look and feels, the user can drag out a tool bar into a separate window (unless the `floatable` property is set to `false`). For drag-out to work correctly, it is recommended that you add `JToolBar` instances to one of the four "sides" of a container whose layout manager is a `BorderLayout`, and do not add children to any of the other four "sides".

Warning: Swing is not thread safe. For more information see Swing's Threading Policy.

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`.

Since:
  1.2
See Also:
  - `Action`

- ## Nested Class Summary

  Nested Classes
  Modifier and Type
  Class
  Description
  `protected class`
  `JToolBar.AccessibleJToolBar`
  This class implements accessibility support for the `JToolBar` class.
  `static class`
  `JToolBar.Separator`
  A toolbar-specific separator.

  ### Nested classes/interfaces declared in class JComponent

  `JComponent.AccessibleJComponent`

  ### Nested classes/interfaces declared in class Container

  `Container.AccessibleAWTContainer`

  ### Nested classes/interfaces declared in class Component

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

- ## Field Summary

  ### Fields declared in class JComponent

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

  ### Fields declared in class Component

  `accessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT`

  ### Fields declared in interface ImageObserver

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

  ### Fields declared in interface 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
  `JToolBar()`
  Creates a new tool bar; orientation defaults to `HORIZONTAL`.
  `JToolBar(int orientation)`
  Creates a new tool bar with the specified `orientation`.
  `JToolBar(String name)`
  Creates a new tool bar with the specified `name`.
  `JToolBar(String name, int orientation)`
  Creates a new tool bar with a specified `name` and `orientation`.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `JButton`
  `add(Action a)`
  Adds a new `JButton` which dispatches the action.
  `protected void`
  `addImpl(Component comp, Object constraints, int index)`
  If a `JButton` is being added, it is initially set to be disabled.
  `void`
  `addSeparator()`
  Appends a separator of default size to the end of the tool bar.
  `void`
  `addSeparator(Dimension size)`
  Appends a separator of a specified size to the end of the tool bar.
  `protected PropertyChangeListener`
  `createActionChangeListener(JButton b)`
  Returns a properly configured `PropertyChangeListener` which updates the control as changes to the `Action` occur, or `null` if the default property change listener for the control is desired.
  `protected JButton`
  `createActionComponent(Action a)`
  Factory method which creates the `JButton` for `Action`s added to the `JToolBar`.
  `AccessibleContext`
  `getAccessibleContext()`
  Gets the AccessibleContext associated with this JToolBar.
  `Component`
  `getComponentAtIndex(int i)`
  Returns the component at the specified index.
  `int`
  `getComponentIndex(Component c)`
  Returns the index of the specified component.
  `Insets`
  `getMargin()`
  Returns the margin between the tool bar's border and its buttons.
  `int`
  `getOrientation()`
  Returns the current orientation of the tool bar.
  `ToolBarUI`
  `getUI()`
  Returns the tool bar's current UI.
  `String`
  `getUIClassID()`
  Returns the name of the L&F class that renders this component.
  `boolean`
  `isBorderPainted()`
  Gets the `borderPainted` property.
  `boolean`
  `isFloatable()`
  Gets the `floatable` property.
  `boolean`
  `isRollover()`
  Returns the rollover state.
  `protected void`
  `paintBorder(Graphics g)`
  Paints the tool bar's border if the `borderPainted` property is `true`.
  `protected String`
  `paramString()`
  Returns a string representation of this `JToolBar`.
  `void`
  `setBorderPainted(boolean b)`
  Sets the `borderPainted` property, which is `true` if the border should be painted.
  `void`
  `setFloatable(boolean b)`
  Sets the `floatable` property, which must be `true` for the user to move the tool bar.
  `void`
  `setMargin(Insets m)`
  Sets the margin between the tool bar's border and its buttons.
  `void`
  `setOrientation(int o)`
  Sets the orientation of the tool bar.
  `void`
  `setRollover(boolean rollover)`
  Sets the rollover state of this toolbar.
  `void`
  `setUI(ToolBarUI ui)`
  Sets the L&F object that renders this component.
  `void`
  `updateUI()`
  Notification from the `UIFactory` that the L&F has changed.

  ### Methods declared in class 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, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, 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`

  ### Methods declared in class Container

  `add, add, add, add, add, addContainerListener, 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`

  ### Methods declared in class 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, 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`

  ### Methods declared in class Object

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

- ## Constructor Details

  - ### JToolBar

    public JToolBar()
    Creates a new tool bar; orientation defaults to `HORIZONTAL`.

  - ### JToolBar

    public JToolBar(int orientation)
    Creates a new tool bar with the specified `orientation`. The `orientation` must be either `HORIZONTAL` or `VERTICAL`.
    Parameters:
      `orientation` - the orientation desired

  - ### JToolBar

    public JToolBar(String name)
    Creates a new tool bar with the specified `name`. The name is used as the title of the undocked tool bar. The default orientation is `HORIZONTAL`.
    Parameters:
      `name` - the name of the tool bar
    Since:
      1.3

  - ### JToolBar

    public JToolBar(String name, int orientation)
    Creates a new tool bar with a specified `name` and `orientation`. All other constructors call this constructor. If `orientation` is an invalid value, an exception will be thrown.
    Parameters:
      `name` - the name of the tool bar
      `orientation` - the initial orientation -- it must be either `HORIZONTAL` or `VERTICAL`
    Throws:
      `IllegalArgumentException` - if orientation is neither `HORIZONTAL` nor `VERTICAL`
    Since:
      1.3

- ## Method Details

  - ### getUI

    public ToolBarUI getUI()
    Returns the tool bar's current UI.
    Overrides:
      `getUI` in class `JComponent`
    Returns:
      the tool bar's current UI.
    See Also:
      - `setUI(ToolBarUI)`

  - ### setUI

    @BeanProperty(hidden=true, visualUpdate=true, description="The UI object that implements the Component's LookAndFeel.") public void setUI(ToolBarUI ui)
    Sets the L&F object that renders this component.
    Parameters:
      `ui` - the `ToolBarUI` L&F object
    See Also:
      - `UIDefaults.getUI(JComponent)`

  - ### updateUI

    public void updateUI()
    Notification from the `UIFactory` that the L&F has changed. Called to replace the UI with the latest version from the `UIFactory`.
    Overrides:
      `updateUI` in class `JComponent`
    See Also:
      - `JComponent.updateUI()`

  - ### getUIClassID

    @BeanProperty(bound=false) public String getUIClassID()
    Returns the name of the L&F class that renders this component.
    Overrides:
      `getUIClassID` in class `JComponent`
    Returns:
      the string "ToolBarUI"
    See Also:
      - `JComponent.getUIClassID()`
      - `UIDefaults.getUI(JComponent)`

  - ### getComponentIndex

    public int getComponentIndex(Component c)
    Returns the index of the specified component. (Note: Separators occupy index positions.)
    Parameters:
      `c` - the `Component` to find
    Returns:
      an integer indicating the component's position, where 0 is first

  - ### getComponentAtIndex

    public Component getComponentAtIndex(int i)
    Returns the component at the specified index.
    Parameters:
      `i` - the component's position, where 0 is first
    Returns:
      the `Component` at that position, or `null` for an invalid index

  - ### setMargin

    @BeanProperty(expert=true, description="The margin between the tool bar's border and contents") public void setMargin(Insets m)
    Sets the margin between the tool bar's border and its buttons. Setting to `null` causes the tool bar to use the default margins. The tool bar's default `Border` object uses this value to create the proper margin. However, if a non-default border is set on the tool bar, it is that `Border` object's responsibility to create the appropriate margin space (otherwise this property will effectively be ignored).
    Parameters:
      `m` - an `Insets` object that defines the space between the border and the buttons
    See Also:
      - `Insets`

  - ### getMargin

    public Insets getMargin()
    Returns the margin between the tool bar's border and its buttons.
    Returns:
      an `Insets` object containing the margin values
    See Also:
      - `Insets`

  - ### isBorderPainted

    public boolean isBorderPainted()
    Gets the `borderPainted` property.
    Returns:
      the value of the `borderPainted` property
    See Also:
      - `setBorderPainted(boolean)`

  - ### setBorderPainted

    @BeanProperty(expert=true, description="Does the tool bar paint its borders?") public void setBorderPainted(boolean b)
    Sets the `borderPainted` property, which is `true` if the border should be painted. The default value for this property is `true`. Some look and feels might not implement painted borders; they will ignore this property.
    Parameters:
      `b` - if true, the border is painted
    See Also:
      - `isBorderPainted()`

  - ### paintBorder

    protected void paintBorder(Graphics g)
    Paints the tool bar's border if the `borderPainted` property is `true`.
    Overrides:
      `paintBorder` in class `JComponent`
    Parameters:
      `g` - the `Graphics` context in which the painting is done
    See Also:
      - `JComponent.paint(Graphics)`
      - `JComponent.setBorder(Border)`

  - ### isFloatable

    public boolean isFloatable()
    Gets the `floatable` property.
    Returns:
      the value of the `floatable` property
    See Also:
      - `setFloatable(boolean)`

  - ### setFloatable

    @BeanProperty(preferred=true, description="Can the tool bar be made to float by the user?") public void setFloatable(boolean b)
    Sets the `floatable` property, which must be `true` for the user to move the tool bar. Typically, a floatable tool bar can be dragged into a different position within the same container or out into its own window. The default value of this property is `true`. Some look and feels might not implement floatable tool bars; they will ignore this property.
    Parameters:
      `b` - if `true`, the tool bar can be moved; `false` otherwise
    See Also:
      - `isFloatable()`

  - ### getOrientation

    public int getOrientation()
    Returns the current orientation of the tool bar. The value is either `HORIZONTAL` or `VERTICAL`.
    Returns:
      an integer representing the current orientation -- either `HORIZONTAL` or `VERTICAL`
    See Also:
      - `setOrientation(int)`

  - ### setOrientation

    @BeanProperty(preferred=true, enumerationValues={"SwingConstants.HORIZONTAL","SwingConstants.VERTICAL"}, description="The current orientation of the tool bar") public void setOrientation(int o)
    Sets the orientation of the tool bar. The orientation must have either the value `HORIZONTAL` or `VERTICAL`. If `orientation` is an invalid value, an exception will be thrown.
    Parameters:
      `o` - the new orientation -- either `HORIZONTAL` or `VERTICAL`
    Throws:
      `IllegalArgumentException` - if orientation is neither `HORIZONTAL` nor `VERTICAL`
    See Also:
      - `getOrientation()`

  - ### setRollover

    @BeanProperty(preferred=true, visualUpdate=true, description="Will draw rollover button borders in the toolbar.") public void setRollover(boolean rollover)
    Sets the rollover state of this toolbar. If the rollover state is true then the border of the toolbar buttons will be drawn only when the mouse pointer hovers over them. The default value of this property is false.

    The implementation of a look and feel may choose to ignore this property.

    Parameters:
      `rollover` - true for rollover toolbar buttons; otherwise false
    Since:
      1.4

  - ### isRollover

    public boolean isRollover()
    Returns the rollover state.
    Returns:
      true if rollover toolbar buttons are to be drawn; otherwise false
    Since:
      1.4
    See Also:
      - `setRollover(boolean)`

  - ### addSeparator

    public void addSeparator()
    Appends a separator of default size to the end of the tool bar. The default size is determined by the current look and feel.

  - ### addSeparator

    public void addSeparator(Dimension size)
    Appends a separator of a specified size to the end of the tool bar.
    Parameters:
      `size` - the `Dimension` of the separator

  - ### add

    public JButton add(Action a)
    Adds a new `JButton` which dispatches the action.
    Parameters:
      `a` - the `Action` object to add as a new menu item
    Returns:
      the new button which dispatches the action

  - ### createActionComponent

    protected JButton createActionComponent(Action a)
    Factory method which creates the `JButton` for `Action`s added to the `JToolBar`. The default name is empty if a `null` action is passed.
    Parameters:
      `a` - the `Action` for the button to be added
    Returns:
      the newly created button
    Since:
      1.3
    See Also:
      - `Action`

  - ### createActionChangeListener

    protected PropertyChangeListener createActionChangeListener(JButton b)
    Returns a properly configured `PropertyChangeListener` which updates the control as changes to the `Action` occur, or `null` if the default property change listener for the control is desired.
    Parameters:
      `b` - a `JButton`
    Returns:
      `null`

  - ### addImpl

    protected void addImpl(Component comp, Object constraints, int index)
    If a `JButton` is being added, it is initially set to be disabled.
    Overrides:
      `addImpl` in class `Container`
    Parameters:
      `comp` - the component to be enhanced
      `constraints` - the constraints to be enforced on the component
      `index` - the index of the component
    See Also:
      - `Container.add(Component)`
      - `Container.add(Component, int)`
      - `Container.add(Component, java.lang.Object)`
      - `Container.invalidate()`
      - `LayoutManager`
      - `LayoutManager2`

  - ### paramString

    protected String paramString()
    Returns a string representation of this `JToolBar`. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be `null`.
    Overrides:
      `paramString` in class `JComponent`
    Returns:
      a string representation of this `JToolBar`.

  - ### getAccessibleContext

    @BeanProperty(bound=false) public AccessibleContext getAccessibleContext()
    Gets the AccessibleContext associated with this JToolBar. For tool bars, the AccessibleContext takes the form of an AccessibleJToolBar. A new AccessibleJToolBar instance is created if necessary.
    Specified by:
      `getAccessibleContext` in interface `Accessible`
    Overrides:
      `getAccessibleContext` in class `Component`
    Returns:
      an AccessibleJToolBar that serves as the AccessibleContext of this JToolBar