java.awt
Class Label

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Label

All Implemented Interfaces:

Accessible, java.awt.image.ImageObserver, MenuContainer, Serializable

public class Label

extends Component

implements Accessible

Unsafe:

See Also:

Serialized Form

Field Summary

(package private) int	alignment The label's alignment.
private static String	base
static int	CENTER Enabled: Indicates that the label should be centered.
static int	LEFT Enabled: Indicates that the label should be left justified.
private static int	nameCounter
static int	RIGHT Enabled: Indicates that the label should be right justified.
private static long	serialVersionUID
(package private) String	text The text of this label.

Fields inherited from class java.awt.Component

accessibleContext, actionListenerK, adjustmentListenerK, appContext, background, BOTTOM_ALIGNMENT, bufferStrategy, CENTER_ALIGNMENT, componentListener, componentListenerK, componentOrientation, containerListenerK, cursor, dropTarget, enabled, eventMask, focusListener, focusListenerK, focusTraversalKeys, font, foreground, graphicsConfig, height, hierarchyBoundsListener, hierarchyBoundsListenerK, hierarchyListener, hierarchyListenerK, ignoreRepaint, incRate, inputMethodListener, inputMethodListenerK, isInc, isPacked, itemListenerK, keyListener, keyListenerK, LEFT_ALIGNMENT, locale, LOCK, metrics, minSize, mouseListener, mouseListenerK, mouseMotionListener, mouseMotionListenerK, mouseWheelListener, mouseWheelListenerK, newEventsOnly, ownedWindowK, parent, peer, peerFont, popups, prefSize, RIGHT_ALIGNMENT, textListenerK, TOP_ALIGNMENT, valid, visible, width, windowClosingException, windowFocusListenerK, windowListenerK, windowStateListenerK, x, y

Constructor Summary

Label()
Suppressed: Constructs an empty label.

Label(String text)
Suppressed: Constructs a new label with the specified string of text, left justified.

Label(String text, int alignment)
Suppressed: Constructs a new label that presents the specified string of text with the specified alignment.

Method Summary

void	addNotify() Suppressed: Creates the peer for this label.
(package private) String	constructComponentName() Construct a name for this component.
AccessibleContext	getAccessibleContext() Suppressed: Gets the AccessibleContext associated with this Label.
int	getAlignment() Suppressed: Gets the current alignment of this label.
String	getText() Suppressed: Gets the text of this label.
private static void	initIDs() Initialize JNI field and method IDs
protected String	paramString() Returns a string representing the state of this Label.
private void	readObject(ObjectInputStream s) Read a label from an object input stream.
void	setAlignment(int alignment) Suppressed: Sets the alignment for this label to the specified alignment.
void	setText(String text) Suppressed: Sets the text for this label to the specified text.

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, addPropertyChangeListener, addPropertyChangeListener, adjustListeningChildrenOnParent, applyComponentOrientation, areFocusTraversalKeysSet, areInputMethodsEnabled, autoProcessMouseWheel, autoTransferFocus, bounds, checkGD, checkImage, checkImage, checkWindowClosingException, clearCurrentFocusCycleRootOnHide, clearMostRecentFocusOwnerOnHide, coalesceEvents, contains, contains, containsFocus, countHierarchyMembers, createBufferStrategy, createBufferStrategy, createChildHierarchyEvents, createHierarchyEvents, createImage, createImage, createVolatileImage, createVolatileImage, deliverEvent, disable, disableEvents, dispatchEvent, dispatchEventImpl, dispatchMouseWheelToAncestor, doLayout, enable, enable, enableEvents, enableInputMethods, eventEnabled, eventTypeEnabled, firePropertyChange, firePropertyChange, firePropertyChange, getAccessibleIndexInParent, getAccessibleStateSet, getAlignmentX, getAlignmentY, getBackBuffer, getBackground, getBounds, getBounds, getBufferStrategy, getColorModel, getComponentAt, getComponentAt, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeys_NoIDCheck, getFocusTraversalKeys, getFocusTraversalKeysEnabled, getFont_NoClientCode, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getListeners, getLocale, getLocation, getLocation, getLocationOnScreen_NoTreeLock, getLocationOnScreen, getMaximumSize, getMinimumSize, getMouseListeners, getMouseMotionListeners, getMouseWheelListeners, getName, getNativeContainer, getParent_NoClientCode, getParent, getPeer, getPreferredSize, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getToolkitImpl, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, initializeFocusTraversalKeys, inside, invalidate, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isEnabledImpl, isFocusable, isFocusCycleRoot, isFocusOwner, isFocusTraversable, isFocusTraversableOverridden, isFontSet, isForegroundSet, isLightweight, isOpaque, isRecursivelyVisible, isShowing, isValid, isVisible, iterate, keyDown, keyUp, layout, lightweightPaint, lightweightPrint, list, list, list, list, list, locate, location, lostFocus, minimumSize, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, nextFocusHelper, numListening, paint, paintAll, paintHeavyweightComponents, postEvent, postsOldMouseEvents, preferredSize, prepareImage, prepareImage, print, printAll, printHeavyweightComponents, processComponentEvent, processEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusHelper, requestFocusInWindow, requestFocusInWindow, resetGC, reshape, resize, resize, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeys_NoIDCheck, setFocusTraversalKeys, setFocusTraversalKeysEnabled, setFont, setForeground, setGCFromPeer, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocus, transferFocusBackward, transferFocusUpCycle, update, updateCursorImmediately, validate

Methods inherited from class java.lang.Object

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

Field Detail

LEFT

public static final int LEFT

Enabled: Indicates that the label should be left justified.

CENTER

public static final int CENTER

Enabled: Indicates that the label should be centered.

RIGHT

public static final int RIGHT

Enabled: Indicates that the label should be right justified.

Since:

JDK1.0t.

text

String text

The text of this label. This text can be modified by the program but never by the user.

See Also:

getText(), setText()

alignment

int alignment

The label's alignment. The default alignment is set to be left justified.

See Also:

getAlignment(), setAlignment()

base

private static final String base

nameCounter

private static int nameCounter

serialVersionUID

private static final long serialVersionUID

Constructor Detail

Label

public Label()
      throws HeadlessException

Suppressed: Constructs an empty label. The text of the label is the empty string "".

See Also:

java.awt.GraphicsEnvironment#isHeadless

Label

public Label(String text)
      throws HeadlessException

Suppressed: Constructs a new label with the specified string of text, left justified.

Parameters:

text - the string that the label presents. A null value will be accepted without causing a NullPointerException to be thrown.

See Also:

java.awt.GraphicsEnvironment#isHeadless

Label

public Label(String text,
             int alignment)
      throws HeadlessException

Suppressed: Constructs a new label that presents the specified string of text with the specified alignment. Possible values for alignment are Label.LEFT, Label.RIGHT, and Label.CENTER.

Parameters:

text - the string that the label presents. A null value will be accepted without causing a NullPointerException to be thrown.

alignment - the alignment value.

See Also:

java.awt.GraphicsEnvironment#isHeadless

Method Detail

readObject

private void readObject(ObjectInputStream s)
                 throws ClassNotFoundException,
                        IOException,
                        HeadlessException

Read a label from an object input stream.

Parameters:

s - the ObjectInputStream to read

ClassNotFoundException

IOException

HeadlessException

Since:

1.4

See Also:

java.awt.GraphicsEnvironment#isHeadless

constructComponentName

String constructComponentName()

Construct a name for this component. Called by getName() when the name is null.

Overrides:

constructComponentName in class Component

addNotify

public void addNotify()

Suppressed: Creates the peer for this label. The peer allows us to modify the appearance of the label without changing its functionality.

Overrides:

addNotify in class Component

See Also:

Component.isDisplayable(), Component.removeNotify()

getAlignment

public int getAlignment()

Suppressed: Gets the current alignment of this label. Possible values are Label.LEFT, Label.RIGHT, and Label.CENTER.

See Also:

java.awt.Label#setAlignment

setAlignment

public void setAlignment(int alignment)

Suppressed: Sets the alignment for this label to the specified alignment. Possible values are Label.LEFT, Label.RIGHT, and Label.CENTER.

Parameters:

alignment - the alignment to be set.

See Also:

java.awt.Label#getAlignment

getText

public String getText()

Suppressed: Gets the text of this label.

Returns:

the text of this label, or null if the text has been set to null.

See Also:

java.awt.Label#setText

setText

public void setText(String text)

Suppressed: Sets the text for this label to the specified text.

Parameters:

text - the text that this label displays. If text is null, it is treated for display purposes like an empty string "".

See Also:

java.awt.Label#getText

paramString

protected String paramString()

Returns a string representing the state of this Label. 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 Component

Returns:

the parameter string of this label

initIDs

private static void initIDs()

Initialize JNI field and method IDs

getAccessibleContext

public AccessibleContext getAccessibleContext()

Suppressed: Gets the AccessibleContext associated with this Label. For labels, the AccessibleContext takes the form of an AccessibleAWTLabel. A new AccessibleAWTLabel instance is created if necessary.

Specified by:

getAccessibleContext in interface Accessible

Overrides:

getAccessibleContext in class Component

Returns:

an AccessibleAWTLabel that serves as the AccessibleContext of this Label