Introduction
The Container class is the superclass for the containers of AWT. Container object can contain other AWT components.
Class declaration
Following is the declaration for java.awt.Container class:
public class Container extends Component
Class constructors
| S.N. | Constructor & Description |
|---|---|
| 1 | Container()This creates a new Container. |
Class methods
| S.N. | Method & Description |
|---|---|
| 1 | Component add(Component comp)Appends the specified component to the end of this container. |
| 2 | Component add(Component comp, int index)Adds the specified component to this container at the given position. |
| 3 | void add(Component comp, Object constraints)Adds the specified component to the end of this container. |
| 4 | void add(Component comp, Object constraints, int index)Adds the specified component to this container with the specified constraints at the specified index. |
| 5 | Component add(String name, Component comp)Adds the specified component to this container. |
| 6 | void addContainerListener(ContainerListener l)Adds the specified container listener to receive container events from this container. |
| 7 | protected void addImpl(Component comp, Object constraints, int index)Adds the specified component to this container at the specified index. |
| 8 | void addNotify()Makes this Container displayable by connecting it to a native screen resource. |
| 9 | void addPropertyChangeListener(PropertyChangeListener listener)Adds a PropertyChangeListener to the listener list. |
| 10 | void add Property Change Listener(String proper tyName, Property Change Listener listener)Adds a PropertyChangeListener to the listener list for a specific property. |
| 11 | void applyComponentOrientation(ComponentOrientation o)Sets the ComponentOrientation property of this container and all components contained within it. |
| 12 | 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. |
| 13 | int countComponents()Deprecated. As of JDK version 1.1, replaced by getComponentCount(). |
| 14 | void deliverEvent(Event e)Deprecated. As of JDK version 1.1, replaced by dispatchEvent(AWTEvent e) |
| 15 | void doLayout()Causes this container to lay out its components. |
| 16 | Component findComponentAt(int x, int y)Locates the visible child component that contains the specified position. |
| 17 | Component findComponentAt(Point p)Locates the visible child component that contains the specified point. |
| 18 | float getAlignmentX()Returns the alignment along the x axis. |
| 19 | float getAlignmentY()Returns the alignment along the y axis. |
| 20 | Component getComponent(int n)Gets the nth component in this container. |
| 21 | Component getComponentAt(int x, int y)Locates the component that contains the x,y position. |
| 22 | Component getComponentAt(Point p)Gets the component that contains the specified point. |
| 23 | int getComponentCount()Gets the number of components in this panel. |
| 24 | Component[] getComponents()Gets all the components in this container. |
| 25 | int getComponentZOrder(Component comp)Returns the z-order index of the component inside the container. |
| 26 | ContainerListener[] getContainerListeners()Returns an array of all the container listeners registered on this container. |
| 27 | Set<AWTKeyStroke> getFocusTraversalKeys(int id)Returns the Set of focus traversal keys for a given traversal operation for this Container. |
| 28 | 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. |
| 29 | Insets getInsets()Determines the insets of this container, which indicate the size of the container’s border. |
| 30 | LayoutManager getLayout()Gets the layout manager for this container. |
| 31 | <T extends EventListener> T[] getListeners(Class<T> listenerType)Returns an array of all the objects currently registered as FooListeners upon this Container. |
| 32 | Dimension getMaximumSize()Returns the maximum size of this container. |
| 33 | Dimension getMinimumSize()Returns the minimum size of this container. |
| 34 | 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. |
| 35 | Dimension getPreferredSize()Returns the preferred size of this container. |
| 36 | Insets insets()Deprecated. As of JDK version 1.1, replaced by getInsets(). |
| 37 | void invalidate()Invalidates the container. |
| 38 | boolean isAncestorOf(Component c)Checks if the component is contained in the component hierarchy of this container. |
| 39 | boolean isFocusCycleRoot()Returns whether this Container is the root of a focus traversal cycle. |
| 40 | boolean isFocusCycleRoot(Container container)Returns whether the specified Container is the focus cycle root of this Container’s focus traversal cycle. |
| 41 | boolean isFocusTraversalPolicyProvider()Returns whether this container provides focus traversal policy. |
| 42 | boolean isFocusTraversalPolicySet()Returns whether the focus traversal policy has been explicitly set for this Container. |
| 43 | void layout()Deprecated. As of JDK version 1.1, replaced by doLayout(). |
| 44 | void list(PrintStream out, int indent)Prints a listing of this container to the specified output stream. |
| 45 | void list(PrintWriter out, int indent)Prints out a list, starting at the specified indentation, to the specified print writer. |
| 46 | Component locate(int x, int y)Deprecated. As of JDK version 1.1, replaced by getComponentAt(int, int). |
| 47 | Dimension minimumSize()Deprecated. As of JDK version 1.1, replaced by getMinimumSize(). |
| 48 | void paint(Graphics g)Paints the container. |
| 49 | void paintComponents(Graphics g)Paints each of the components in this container. |
| 50 | protected String paramString()Returns a string representing the state of this Container. |
| 51 | Dimension preferredSize()Deprecated. As of JDK version 1.1, replaced by getPreferredSize(). |
| 52 | void print(Graphics g)Prints the container. |
| 53 | void printComponents(Graphics g)Prints each of the components in this container. |
| 54 | protected void processContainerEvent(ContainerEvent e)Processes container events occurring on this container by dispatching them to any registered ContainerListener objects. |
| 55 | protected void processEvent(AWTEvent e)Processes events on this container. |
| 56 | void remove(Component comp)Removes the specified component from this container. |
| 57 | void remove(int index)Removes the component, specified by index, from this container. |
| 58 | void removeAll()Removes all the components from this container. |
| 59 | void removeContainerListener(ContainerListener l)Removes the specified container listener so it no longer receives container events from this container. |
| 60 | void removeNotify()Makes this Container undisplayable by removing its connection to its native screen resource. |
| 61 | void setComponentZOrder(Component comp, int index)Moves the specified component to the specified z-order index in the container. |
| 62 | void setFocusCycleRoot(boolean focusCycleRoot)Sets whether this Container is the root of a focus traversal cycle. |
| 63 | void setFocusTraversalKeys(int id, Set<? extends AWTKeyStroke> keystrokes)Sets the focus traversal keys for a given traversal operation for this Container. |
| 64 | 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. |
| 65 | void setFocusTraversalPolicyProvider(boolean provider)Sets whether this container will be used to provide focus traversal policy. |
| 66 | void setFont(Font f)Sets the font of this container. |
| 67 | void setLayout(LayoutManager mgr)Sets the layout manager for this container. |
| 68 | void transferFocusBackward()Transfers the focus to the previous component, as though this Component were the focus owner. |
| 69 | void transferFocusDownCycle()Transfers the focus down one focus traversal cycle. |
| 70 | void update(Graphics g)Updates the container. |
| 71 | void validate()Validates this container and all of its subcomponents. |
| 72 | 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
This class inherits methods from the following classes:
- java.awt.Component
- java.lang.Object
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