Overview | Package | Class | Use | Tree | Deprecated | Index | Help
| JavaTM 2 Platform Std. Ed. v1.3.1
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## java.awt
Class Label

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

All Implemented Interfaces:
  Accessible, ImageObserver, MenuContainer, Serializable

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 label:

Since:
  JDK1.0
See Also:
  Serialized Form

Inner Class Summary
`protected class` | `Label.AccessibleAWTLabel` This class implements accessibility support for the `Label` class.

Inner classes inherited from class java.awt.Component
`Component.AccessibleAWTComponent`

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`

Fields inherited from interface java.awt.image.ImageObserver
`ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH`

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 the parameter 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, addPropertyChangeListener, addPropertyChangeListener, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, deliverEvent, disable, disableEvents, dispatchEvent, doLayout, enable, enable, enableEvents, enableInputMethods, firePropertyChange, getAlignmentX, getAlignmentY, getBackground, getBounds, getBounds, getColorModel, getComponentAt, getComponentAt, getComponentOrientation, getCursor, getDropTarget, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getInputContext, getInputMethodRequests, getListeners, getLocale, getLocation, getLocation, getLocationOnScreen, getMaximumSize, getMinimumSize, getName, getParent, getPeer, getPreferredSize, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, invalidate, isDisplayable, isDoubleBuffered, isEnabled, isFocusTraversable, isLightweight, isOpaque, 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, postEvent, preferredSize, prepareImage, prepareImage, print, printAll, processComponentEvent, processEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeNotify, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, reshape, resize, resize, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFont, setForeground, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus, update, 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

  Indicates that the label should be left justified.

### CENTER

    public static final int CENTER

  Indicates that the label should be centered.

### RIGHT

    public static final int RIGHT

  Indicates that the label should be right justified.
  Since:
    JDK1.0t.

Constructor Detail

### Label

    public Label()

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

### Label

    public Label(String text)

  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.

### Label

    public Label(String text,
                 int alignment)

  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.

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`
  Following copied from class: `java.awt.Component`
  See Also:
    `Component.isDisplayable()`, `Component.removeNotify()`

### getAlignment

    public int getAlignment()

  Gets the current alignment of this label. Possible values are `Label.LEFT`, `Label.RIGHT`, and `Label.CENTER`.
  See Also:
    `setAlignment(int)`

### setAlignment

    public 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.
  Throws:
    `IllegalArgumentException` - if an improper value for `alignment` is given.
  See Also:
    `getAlignment()`

### 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`.
  See Also:
    `setText(java.lang.String)`

### 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 `""`.
  See Also:
    `getText()`

### paramString

    protected String paramString()

  Returns the parameter string representing the state of this label. This string is useful for debugging.
  Overrides:
    `paramString` in class `Component`
  Returns:
    the parameter string of this label.

### 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.
  Specified by:
    `getAccessibleContext` in interface `Accessible`
  Overrides:
    `getAccessibleContext` in class `Component`
  Returns:
    an AccessibleAWTLabel that serves as the AccessibleContext of this Label

Overview | Package | Class | Use | Tree | Deprecated | Index | Help
| JavaTM 2 Platform Std. Ed. v1.3.1
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

Submit a bug or feature
For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Java, Java 2D, and JDBC are trademarks or registered trademarks of Sun Microsystems, Inc. in the US and other countries.
Copyright 1993-2001 Sun Microsystems, Inc. 901 San Antonio Road
Palo Alto, California, 94303, U.S.A. All Rights Reserved.