Component类是AWT的非菜单用户界面控件的抽象基类。Component表示具有图形表示的对象。
类声明
以下是java.awt.Component类的声明 -
public abstract class Component
extends Object
implements ImageObserver, MenuContainer, Serializable
字段
以下是java.awt.Component类的字段 -
static float BOTTOM_ALIGNMENT-getAlignmentY()使用的常量。static float CENTER_ALIGNMENT-getAlignmentY()和getAlignmentX()使用的常量。static float LEFT_ALIGNMENT-getAlignmentX()使用的常量。static float RIGHT_ALIGNMENT-getAlignmentX()使用的常量。static float TOP_ALIGNMENT-getAlignmentY()使用的常量。
类构造函数
protected Component()- 它用于创建一个新的组件。
类方法
以下是Swing Component类中的方法列表。
boolean action(Event evt, Object what)- Deprecated. As of JDK version 1.1, should register this component as ActionListener on the component which fires action events.void add(PopupMenu popup)- Adds the specified popup menu to the component.void addComponentListener(ComponentListener l)- Adds the specified component listener to receive the component events from this component.void addFocusListener(FocusListener l)- Adds the specified focus listener to receive focus events from this component, when this component gains input focus.void addHierarchyBoundsListener(HierarchyBoundsListener l)- Adds the specified hierarchy bounds listener to receive hierarchy bounds events from this component, when the hierarchy to which this container belongs changes.void addHierarchyListener(HierarchyListener l)- Adds the specified hierarchy listener to receive hierarchy changed events from this component, when the hierarchy to which this container belongs changes.void addInputMethodListener(InputMethodListener l)- Adds the specified input method listener to receive input method events from this component.void addKeyListener(KeyListener l)- Adds the specified key listener to receive key events from this component.void addMouseListener(MouseListener l)- Adds the specified mouse listener to receive mouse events from this component.void addMouseMotionListener(MouseMotionListener l)- Adds the specified mouse motion listener to receive mouse motion events from this component.void addMouseWheelListener(MouseWheelListener l)- Adds the specified mouse wheel listener to receive mouse wheel events from this component.void addNotify()- Makes this Component 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 orientation)- Sets the ComponentOrientation property of this component 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 Component.int checkImage(Image image, ImageObserver observer)- Returns the status of the construction of a screen representation of the specified image.int checkImage(Image image,int width,int height, ImageObserver observer)- Returns the status of the construction of a screen representation of the specified image.boolean contains(int x,int y)- Checks whether this component “contains” the specified point, where x and y are defined to be relative to the coordinate system of this component.boolean contains(Point p)- Checks whether this component “contains” the specified point, where the point’s x and y coordinates are defined to be relative to the coordinate system of this component.Image createImage(ImageProducer producer)- Creates an image from the specified image producer.Image createImage(int width,int height)- Creates an off-screen drawable image to be used for double buffering.VolatileImage createVolatileImage(int width,int height)- Creates a volatile off-screen drawable image to be used for double buffering.VolatileImage createVolatileImage(int width,int height, ImageCapabilities caps)- Creates a volatile off-screen drawable image, with the given capabilities.void deliverEvent(Event e)- Deprecated. As of JDK version 1.1, replaced by dispatchEvent(AWTEvent e).void disable()- Deprecated. As of JDK version 1.1, replaced by setEnabled(boolean).protected void disableEvents(long eventsToDisable)- Disables the events defined by the specified event mask parameter from being delivered to this component.void dispatchEvent(AWTEvent e)- Dispatches an event to this component or one of its sub components.void doLayout()- Prompts the layout manager to lay out this component.void enable()- Deprecated. As of JDK version 1.1, replaced by setEnabled(boolean).void enable(boolean b)- Deprecated. As of JDK version 1.1, replaced by setEnabled(boolean).protected void enableEvents(long eventsToEnable)- Enables the events defined by the specified event mask parameter to be delivered to this component.void enableInputMethods(boolean enable)- Enables or disables input method support for this component.protected void firePropertyChange(String propertyName, boolean oldValue, boolean newValue)- Supports reporting bound property changes for boolean properties.void firePropertyChange(String propertyName, byte oldValue, byte newValue)- Reports a bound property change.void firePropertyChange(String propertyName, char oldValue, char newValue)- Reports a bound property change.void firePropertyChange(String propertyName, double oldValue, double newValue)- Reports a bound property change.void firePropertyChange(String propertyName, float oldValue, float newValue)- Reports a bound property change.void firePropertyChange(String propertyName, long oldValue, long newValue)- Reports a bound property change.protected void firePropertyChange(String propertyName, Object oldValue, Object newValue)- Supports reporting bound property changes for Object properties.void firePropertyChange(String propertyName, short oldValue, short newValue)- Reports a bound property change.AccessibleContext getAccessibleContext()- Gets the AccessibleContext associated with this Component.float getAlignmentX()- Returns the alignment along the x axis.
方法继承
该类继承以下类中的方法 -
java.lang.Object