java.lang.Object
java.awt.Component
java.awt.Label
- All Implemented Interfaces:
- ImageObserver,- MenuContainer,- Serializable,- 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:
 
- Since:
- 1.0
- See Also:
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Nested Class SummaryNested ClassesModifier and TypeClassDescriptionprotected classThis class implements accessibility support for theLabelclass.Nested classes/interfaces declared in class java.awt.ComponentComponent.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy
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Field SummaryFieldsModifier and TypeFieldDescriptionstatic final intIndicates that the label should be centered.static final intIndicates that the label should be left justified.static final intIndicates that the label should be right justified.Fields declared in class java.awt.ComponentaccessibleContext, BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENTFields declared in interface java.awt.image.ImageObserverABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH
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Constructor SummaryConstructors
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Method SummaryModifier and TypeMethodDescriptionvoidCreates the peer for this label.Gets the AccessibleContext associated with this Label.intGets the current alignment of this label.getText()Gets the text of this label.protected StringReturns a string representing the state of thisLabel.voidsetAlignment(int alignment) Sets the alignment for this label to the specified alignment.voidSets the text for this label to the specified text.Methods declared in class java.awt.Componentaction, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, 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, 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, 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, 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, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, requestFocusInWindow, reshape, resize, resize, revalidate, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setFocusable, setFocusTraversalKeys, setFocusTraversalKeysEnabled, setFont, setForeground, setIgnoreRepaint, setLocale, setLocation, setLocation, setMaximumSize, setMinimumSize, setMixingCutoutShape, setName, setPreferredSize, setSize, setSize, setVisible, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle, update, validate
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Field Details- 
LEFTpublic static final int LEFTIndicates that the label should be left justified.- See Also:
 
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CENTERpublic static final int CENTERIndicates that the label should be centered.- See Also:
 
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RIGHTpublic static final int RIGHTIndicates that the label should be right justified.- See Also:
 
 
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Constructor Details- 
LabelConstructs an empty label. The text of the label is the empty string"".- Throws:
- HeadlessException- if GraphicsEnvironment.isHeadless() returns true.
- See Also:
 
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LabelConstructs a new label with the specified string of text, left justified.- Parameters:
- text- the string that the label presents. A- nullvalue will be accepted without causing a NullPointerException to be thrown.
- Throws:
- HeadlessException- if GraphicsEnvironment.isHeadless() returns true.
- See Also:
 
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LabelConstructs a new label that presents the specified string of text with the specified alignment. Possible values foralignmentareLabel.LEFT,Label.RIGHT, andLabel.CENTER.- Parameters:
- text- the string that the label presents. A- nullvalue will be accepted without causing a NullPointerException to be thrown.
- alignment- the alignment value.
- Throws:
- HeadlessException- if GraphicsEnvironment.isHeadless() returns true.
- See Also:
 
 
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Method Details- 
addNotifypublic void addNotify()Creates the peer for this label. The peer allows us to modify the appearance of the label without changing its functionality.
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getAlignmentpublic int getAlignment()Gets the current alignment of this label. Possible values areLabel.LEFT,Label.RIGHT, andLabel.CENTER.- Returns:
- the alignment of this label
- See Also:
 
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setAlignmentpublic void setAlignment(int alignment) Sets the alignment for this label to the specified alignment. Possible values areLabel.LEFT,Label.RIGHT, andLabel.CENTER.- Parameters:
- alignment- the alignment to be set.
- Throws:
- IllegalArgumentException- if an improper value for- alignmentis given.
- See Also:
 
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getTextGets the text of this label.- Returns:
- the text of this label, or nullif the text has been set tonull.
- See Also:
 
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setTextSets the text for this label to the specified text.- Parameters:
- text- the text that this label displays. If- textis- null, it is treated for display purposes like an empty string- "".
- See Also:
 
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paramStringReturns a string representing the state of thisLabel. 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 benull.- Overrides:
- paramStringin class- Component
- Returns:
- the parameter string of this label
 
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getAccessibleContextGets 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:
- getAccessibleContextin interface- Accessible
- Overrides:
- getAccessibleContextin class- Component
- Returns:
- an AccessibleAWTLabel that serves as the AccessibleContext of this Label
- Since:
- 1.3
 
 
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