Java awt container addimpl
A generic Abstract Window Toolkit(AWT) container object is a component that can contain other AWT components.
Components added to a container are tracked in a list. The order of the list will define the components’ front-to-back stacking order within the container. If no index is specified when adding a component to a container, it will be added to the end of the list (and hence to the bottom of the stacking order).
Note : For details on the focus subsystem, see How to Use the Focus Subsystem , a section in The Java Tutorial, and the Focus Specification for more information.
| Nested Class Summary | |
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| protected class | Container.AccessibleAWTContainer Inner class of Container used to provide default support for accessibility. |
| Nested classes/interfaces inherited from class java.awt. Component |
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| Component.AccessibleAWTComponent , Component.BaselineResizeBehavior , Component.BltBufferStrategy , Component.FlipBufferStrategy |
| Field Summary |
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| Fields inherited from class java.awt. Component |
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| BOTTOM_ALIGNMENT , CENTER_ALIGNMENT , LEFT_ALIGNMENT , RIGHT_ALIGNMENT , TOP_ALIGNMENT |
| Fields inherited from interface java.awt.image. ImageObserver |
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| ABORT , ALLBITS , ERROR , FRAMEBITS , HEIGHT , PROPERTIES , SOMEBITS , WIDTH |
| Constructor Summary | |
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| Container () Constructs a new Container. | |
| Method Summary | ||
|---|---|---|
| Component | add ( Component comp) Appends the specified component to the end of this container. | |
| Component | add ( Component comp, int index) Adds the specified component to this container at the given position. | |
| void | add ( Component comp, Object constraints) Adds the specified component to the end of this container. | |
| void | add ( Component comp, Object constraints, int index) Adds the specified component to this container with the specified constraints at the specified index. | |
| Component | add ( String name, Component comp) Adds the specified component to this container. | |
| void | addContainerListener ( ContainerListener l) Adds the specified container listener to receive container events from this container. | |
| protected void | addImpl ( Component comp, Object constraints, int index) Adds the specified component to this container at the specified index. | |
| void | addNotify () Makes this Container displayable by connecting it to a native screen resource. | |
| void | addPropertyChangeListener ( PropertyChangeListener listener) Adds a PropertyChangeListener to the listener list. | |
| void | addPropertyChangeListener ( String propertyName, PropertyChangeListener listener) Adds a PropertyChangeListener to the listener list for a specific property. | |
| void | applyComponentOrientation ( ComponentOrientation o) Sets the ComponentOrientation property of this container and all components contained within it. | |
| boolean | areFocusTraversalKeysSet (int id) Returns whether the Set of focus traversal keys for the given focus traversal operation has been explicitly defined for this Container. | |
| int | countComponents () Deprecated. As of JDK version 1.1, replaced by getComponentCount(). | |
| void | deliverEvent ( Event e) Deprecated. As of JDK version 1.1, replaced by dispatchEvent(AWTEvent e) | |
| void | doLayout () Causes this container to lay out its components. | |
| Component | findComponentAt (int x, int y) Locates the visible child component that contains the specified position. | |
| Component | findComponentAt ( Point p) Locates the visible child component that contains the specified point. | |
| float | getAlignmentX () Returns the alignment along the x axis. | |
| float | getAlignmentY () Returns the alignment along the y axis. | |
| Component | getComponent (int n) Gets the nth component in this container. | |
| Component | getComponentAt (int x, int y) Locates the component that contains the x,y position. | |
| Component | getComponentAt ( Point p) Gets the component that contains the specified point. | |
| int | getComponentCount () Gets the number of components in this panel. | |
| Component [] | getComponents () Gets all the components in this container. | |
| int | getComponentZOrder ( Component comp) Returns the z-order index of the component inside the container. | |
| ContainerListener [] | getContainerListeners () Returns an array of all the container listeners registered on this container. | |
| Set | getFocusTraversalKeys (int id) Returns the Set of focus traversal keys for a given traversal operation for this Container. | |
| FocusTraversalPolicy | getFocusTraversalPolicy () Returns the focus traversal policy that will manage keyboard traversal of this Container’s children, or null if this Container is not a focus cycle root. | |
| Insets | getInsets () Determines the insets of this container, which indicate the size of the container’s border. | |
| LayoutManager | getLayout () Gets the layout manager for this container. | |
| getListeners ( Class listenerType) Returns an array of all the objects currently registered as FooListeners upon this Container. | |
| Dimension | getMaximumSize () Returns the maximum size of this container. | |
| Dimension | getMinimumSize () Returns the minimum size of this container. | |
| Point | getMousePosition (boolean allowChildren) Returns the position of the mouse pointer in this Container’s coordinate space if the Container is under the mouse pointer, otherwise returns null. | |
| Dimension | getPreferredSize () Returns the preferred size of this container. | |
| Insets | insets () Deprecated. As of JDK version 1.1, replaced by getInsets(). | |
| void | invalidate () Invalidates the container. | |
| boolean | isAncestorOf ( Component c) Checks if the component is contained in the component hierarchy of this container. | |
| boolean | isFocusCycleRoot () Returns whether this Container is the root of a focus traversal cycle. | |
| boolean | isFocusCycleRoot ( Container container) Returns whether the specified Container is the focus cycle root of this Container’s focus traversal cycle. | |
| boolean | isFocusTraversalPolicyProvider () Returns whether this container provides focus traversal policy. | |
| boolean | isFocusTraversalPolicySet () Returns whether the focus traversal policy has been explicitly set for this Container. | |
| void | layout () Deprecated. As of JDK version 1.1, replaced by doLayout(). | |
| void | list ( PrintStream out, int indent) Prints a listing of this container to the specified output stream. | |
| void | list ( PrintWriter out, int indent) Prints out a list, starting at the specified indentation, to the specified print writer. | |
| Component | locate (int x, int y) Deprecated. As of JDK version 1.1, replaced by getComponentAt(int, int). | |
| Dimension | minimumSize () Deprecated. As of JDK version 1.1, replaced by getMinimumSize(). | |
| void | paint ( Graphics g) Paints the container. | |
| void | paintComponents ( Graphics g) Paints each of the components in this container. | |
| protected String | paramString () Returns a string representing the state of this Container. | |
| Dimension | preferredSize () Deprecated. As of JDK version 1.1, replaced by getPreferredSize(). | |
| void | print ( Graphics g) Prints the container. | |
| void | printComponents ( Graphics g) Prints each of the components in this container. | |
| protected void | processContainerEvent ( ContainerEvent e) Processes container events occurring on this container by dispatching them to any registered ContainerListener objects. | |
| protected void | processEvent ( AWTEvent e) Processes events on this container. | |
| void | remove ( Component comp) Removes the specified component from this container. | |
| void | remove (int index) Removes the component, specified by index, from this container. | |
| void | removeAll () Removes all the components from this container. | |
| void | removeContainerListener ( ContainerListener l) Removes the specified container listener so it no longer receives container events from this container. | |
| void | removeNotify () Makes this Container undisplayable by removing its connection to its native screen resource. | |
| void | setComponentZOrder ( Component comp, int index) Moves the specified component to the specified z-order index in the container. | |
| void | setFocusCycleRoot (boolean focusCycleRoot) Sets whether this Container is the root of a focus traversal cycle. | |
| void | setFocusTraversalKeys (int id, Set keystrokes) Sets the focus traversal keys for a given traversal operation for this Container. | |
| void | setFocusTraversalPolicy ( FocusTraversalPolicy policy) Sets the focus traversal policy that will manage keyboard traversal of this Container’s children, if this Container is a focus cycle root. | |
| void | setFocusTraversalPolicyProvider (boolean provider) Sets whether this container will be used to provide focus traversal policy. | |
| void | setFont ( Font f) Sets the font of this container. | |
| void | setLayout ( LayoutManager mgr) Sets the layout manager for this container. | |
| void | transferFocusBackward () Transfers the focus to the previous component, as though this Component were the focus owner. | |
| void | transferFocusDownCycle () Transfers the focus down one focus traversal cycle. | |
| void | update ( Graphics g) Updates the container. | |
| void | validate () Validates this container and all of its subcomponents. | |
| protected void | validateTree () Recursively descends the container tree and recomputes the layout for any subtrees marked as needing it (those marked as invalid). | |
| Methods inherited from class java.awt. Component |
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| action , add , addComponentListener , addFocusListener , addHierarchyBoundsListener , addHierarchyListener , addInputMethodListener , addKeyListener , addMouseListener , addMouseMotionListener , addMouseWheelListener , bounds , checkImage , checkImage , coalesceEvents , contains , contains , createImage , createImage , createVolatileImage , createVolatileImage , disable , disableEvents , dispatchEvent , enable , enable , enableEvents , enableInputMethods , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , firePropertyChange , getAccessibleContext , getBackground , getBaseline , getBaselineResizeBehavior , getBounds , getBounds , getColorModel , getComponentListeners , getComponentOrientation , getCursor , getDropTarget , getFocusCycleRootAncestor , getFocusListeners , getFocusTraversalKeysEnabled , getFont , getFontMetrics , getForeground , getGraphics , getGraphicsConfiguration , getHeight , getHierarchyBoundsListeners , getHierarchyListeners , getIgnoreRepaint , getInputContext , getInputMethodListeners , getInputMethodRequests , getKeyListeners , getLocale , getLocation , getLocation , getLocationOnScreen , getMouseListeners , getMouseMotionListeners , getMousePosition , getMouseWheelListeners , getName , getParent , getPeer , getPropertyChangeListeners , getPropertyChangeListeners , getSize , getSize , getToolkit , getTreeLock , getWidth , getX , getY , gotFocus , handleEvent , hasFocus , hide , imageUpdate , inside , isBackgroundSet , isCursorSet , isDisplayable , isDoubleBuffered , isEnabled , isFocusable , isFocusOwner , isFocusTraversable , isFontSet , isForegroundSet , isLightweight , isMaximumSizeSet , isMinimumSizeSet , isOpaque , isPreferredSizeSet , isShowing , isValid , isVisible , keyDown , keyUp , list , list , list , location , lostFocus , mouseDown , mouseDrag , mouseEnter , mouseExit , mouseMove , mouseUp , move , nextFocus , paintAll , postEvent , prepareImage , prepareImage , printAll , processComponentEvent , processFocusEvent , processHierarchyBoundsEvent , processHierarchyEvent , processInputMethodEvent , processKeyEvent , processMouseEvent , processMouseMotionEvent , processMouseWheelEvent , remove , removeComponentListener , removeFocusListener , removeHierarchyBoundsListener , removeHierarchyListener , removeInputMethodListener , removeKeyListener , removeMouseListener , removeMouseMotionListener , removeMouseWheelListener , removePropertyChangeListener , removePropertyChangeListener , repaint , repaint , repaint , repaint , requestFocus , requestFocus , requestFocusInWindow , requestFocusInWindow , reshape , resize , resize , setBackground , setBounds , setBounds , setComponentOrientation , setCursor , setDropTarget , setEnabled , setFocusable , setFocusTraversalKeysEnabled , setForeground , setIgnoreRepaint , setLocale , setLocation , setLocation , setMaximumSize , setMinimumSize , setName , setPreferredSize , setSize , setSize , setVisible , show , show , size , toString , transferFocus , transferFocusUpCycle |
| Methods inherited from class java.lang. Object |
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| clone , equals , finalize , getClass , hashCode , notify , notifyAll , wait , wait , wait |
Container
Constructs a new Container. Containers can be extended directly, but are lightweight in this case and must be contained by a parent somewhere higher up in the component tree that is native. (such as Frame for example).
getComponentCount
public int getComponentCount()
Returns: the number of components in this panel. Since: JDK1.1 See Also: getComponent(int)
countComponents
@Deprecated public int countComponents()