全部教學 » Swing Component類

Swing Component類

2019-10-16 22:10:19

Component類是AWT的非選單使用者介面控制元件的抽象基礎類別。Component表示具有圖形表示的物件。

類宣告

以下是java.awt.Component類的宣告 - 

public abstract class Component
   extends Object
      implements ImageObserver, MenuContainer, Serializable

欄位

以下是java.awt.Component類的欄位 -

  • static float BOTTOM_ALIGNMENT - getAlignmentY()使用的常數。
  • static float CENTER_ALIGNMENT - getAlignmentY()和getAlignmentX()使用的常數。
  • static float LEFT_ALIGNMENT - getAlignmentX()使用的常數。
  • static float RIGHT_ALIGNMENT - getAlignmentX()使用的常數。
  • static float TOP_ALIGNMENT - getAlignmentY()使用的常數。

類建構函式

  • protected Component() - 它用於建立一個新的元件。

類方法

以下是Swing Component類中的方法列表。

  • 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.

方法繼承

該類繼承以下類中的方法 -

  • java.lang.Object