This documentation differs from the official API. Jadeite adds extra features to the API including: variable font sizes, constructions examples, placeholders for classes and methods, and auto-generated “See Also” links. Additionally it is missing some items found in standard Javadoc documentation, including: generics type information, “Deprecated” tags and comments, “See Also” links, along with other minor differences. Please send any questions or feedback to bam@cs.cmu.edu.
Overview  Package   Class 
 PREV CLASS   NEXT CLASS FRAMES   NO FRAMES 
SUMMARY: NESTED | FIELD | CONSTR | METHOD  DETAIL: FIELD | CONSTR | METHOD 

java.awt
class Label

java.lang.Object extended by java.awt.Component extended by java.awt.Label
All Implemented Interfaces:
MenuContainer, ImageObserver, Serializable, Accessible
Most common way to construct:

Label messageLabel = new Label("Description");

Based on 48 examples 

public class Label
extends Component
implements Accessible

A Label object is a component for placing text in a container. A label displays a single line of read-only text. The text can be changed by the application, but a user cannot edit it directly.

For example, the code . . . 

 setLayout(new FlowLayout(FlowLayout.CENTER, 10, 10));
 add(new Label("Hi There!"));
 add(new Label("Another Label"));

produces the following labels:

Two labels: 'Hi There!' and 'Another label'

Nested Class Summary
protected class
Label.AccessibleAWTLabel

           This class implements accessibility support for the Label class.
Nested classes/interfaces inherited from class java.awt.Component
Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy
   
Field Summary
static int CENTER
          Indicates that the label should be centered.
static int LEFT
          Indicates that the label should be left justified.
static int RIGHT
          Indicates that the label should be right justified.
 
Fields inherited from class java.awt.Component
BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT
 
Constructor Summary
Label()

          Constructs an empty label.
Label(String text)

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

          Constructs a new label that presents the specified string of text with the specified alignment.
 
Method Summary
 void
addNotify()

          Creates the peer for this label.
 AccessibleContext
getAccessibleContext()

          Gets the AccessibleContext associated with this Label.
 int
getAlignment()

          Gets the current alignment of this label.
 String
getText()

          Gets the text of this label.
protected String
paramString()

          Returns a string representing the state of this Label.
 void
setAlignment(int alignment)

          Sets the alignment for this label to the specified alignment.
 void
setText(String text)

          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, addNotify, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, createVolatileImage, createVolatileImage, deliverEvent, disable, disableEvents, dispatchEvent, doLayout, enable, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getAccessibleContext, getAlignmentX, getAlignmentY, getBackground, getBaseline, getBaselineResizeBehavior, getBounds, getBounds, getColorModel, getComponentAt, getComponentAt, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeys, getFocusTraversalKeysEnabled, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getListeners, getLocale, getLocation, getLocation, getLocationOnScreen, getMaximumSize, getMinimumSize, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPreferredSize, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, invalidate, isBackgroundSet, isCursorSet, isDisplayable, isDoubleBuffered, isEnabled, isFocusable, isFocusCycleRoot, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isOpaque, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, layout, list, list, list, list, list, locate, location, lostFocus, minimumSize, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paint, paintAll, paramString, postEvent, preferredSize, prepareImage, prepareImage, print, printAll, 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, requestFocusInWindow, requestFocusInWindow, reshape, resize, resize, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeys, setFocusTraversalKeysEnabled, setFont, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setMaximumSize, setMinimumSize, setName, setPreferredSize, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle, update, validate
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

CENTER

public static final int CENTER
Indicates that the label should be centered.

LEFT

public static final int LEFT
Indicates that the label should be left justified.

RIGHT

public static final int RIGHT
Indicates that the label should be right justified.
Constructor Detail

Label

public Label()
      throws HeadlessException
Constructs an empty label. The text of the label is the empty string "".

Throws:
HeadlessException - if GraphicsEnvironment.isHeadless() returns true.

Label

public Label(String text)
      throws HeadlessException
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.
Throws:
HeadlessException - if GraphicsEnvironment.isHeadless() returns true.

Label

public Label(String text,
             int alignment)
      throws HeadlessException
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.
Throws:
HeadlessException - if GraphicsEnvironment.isHeadless() returns true.
Method Detail

addNotify

public void addNotify()
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

getAccessibleContext

public AccessibleContext getAccessibleContext()
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.

Overrides:
getAccessibleContext in class Component
Returns:
an AccessibleAWTLabel that serves as the AccessibleContext of this Label

getAlignment

public int getAlignment()
Gets the current alignment of this label. Possible values are Label.LEFT, Label.RIGHT, and Label.CENTER.

getText

public String getText()
Gets the text of this label.

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

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

setAlignment

public synchronized void setAlignment(int alignment)
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.

setText

public void setText(String text)
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 "".
Overview  Package   Class 
 PREV CLASS   NEXT CLASS FRAMES   NO FRAMES 
SUMMARY: NESTED | FIELD | CONSTR | METHOD  DETAIL: FIELD | CONSTR | METHOD 
This documentation differs from the official API. Jadeite adds extra features to the API including: variable font sizes, constructions examples, placeholders for classes and methods, and auto-generated “See Also” links. Additionally it is missing some items found in standard Javadoc documentation, including: generics type information, “Deprecated” tags and comments, “See Also” links, along with other minor differences. Please send any questions or feedback to bam@cs.cmu.edu.
This page displays the Jadeite version of the documention, which is derived from the offical documentation that contains this copyright notice:
Copyright 2008 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.
The official Sun™ documentation can be found here at http://java.sun.com/javase/6/docs/api/.