java.awt

Class TextArea

java.lang.Object

java.awt.Component

java.awt.TextComponent

java.awt.TextArea

All Implemented Interfaces:

ImageObserver, MenuContainer, Serializable, Accessible

public class TextArea
extends TextComponent

A TextArea object is a multi-line region that displays text. It can be set to allow editing or to be read-only.

The following image shows the appearance of a text area:

This text area could be created by the following line of code:

 new TextArea("Hello", 5, 40);
 

Since:

JDK1.0

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	TextArea.AccessibleAWTTextArea This class implements accessibility support for the TextArea class.

Nested classes/interfaces inherited from class java.awt.TextComponent

TextComponent.AccessibleAWTTextComponent

Nested classes/interfaces inherited from class java.awt.Component

Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy

Field Summary

Fields

Modifier and Type	Field and Description
static int	SCROLLBARS_BOTH Create and display both vertical and horizontal scrollbars.
static int	SCROLLBARS_HORIZONTAL_ONLY Create and display horizontal scrollbar only.
static int	SCROLLBARS_NONE Do not create or display any scrollbars for the text area.
static int	SCROLLBARS_VERTICAL_ONLY Create and display vertical scrollbar only.

Fields inherited from class java.awt.TextComponent

textListener

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

Constructors

Constructor and Description
TextArea() Constructs a new text area with the empty string as text.
TextArea(int rows, int columns) Constructs a new text area with the specified number of rows and columns and the empty string as text.
TextArea(String text) Constructs a new text area with the specified text.
TextArea(String text, int rows, int columns) Constructs a new text area with the specified text, and with the specified number of rows and columns.
TextArea(String text, int rows, int columns, int scrollbars) Constructs a new text area with the specified text, and with the rows, columns, and scroll bar visibility as specified.

Method Summary

Methods

Modifier and Type	Method and Description
void	addNotify() Creates the TextArea's peer.
void	append(String str) Appends the given text to the text area's current text.
void	appendText(String str) Deprecated. As of JDK version 1.1, replaced by append(String).
AccessibleContext	getAccessibleContext() Returns the AccessibleContext associated with this TextArea.
int	getColumns() Returns the number of columns in this text area.
Dimension	getMinimumSize() Determines the minimum size of this text area.
Dimension	getMinimumSize(int rows, int columns) Determines the minimum size of a text area with the specified number of rows and columns.
Dimension	getPreferredSize() Determines the preferred size of this text area.
Dimension	getPreferredSize(int rows, int columns) Determines the preferred size of a text area with the specified number of rows and columns.
int	getRows() Returns the number of rows in the text area.
int	getScrollbarVisibility() Returns an enumerated value that indicates which scroll bars the text area uses.
void	insert(String str, int pos) Inserts the specified text at the specified position in this text area.
void	insertText(String str, int pos) Deprecated. As of JDK version 1.1, replaced by insert(String, int).
Dimension	minimumSize() Deprecated. As of JDK version 1.1, replaced by getMinimumSize().
Dimension	minimumSize(int rows, int columns) Deprecated. As of JDK version 1.1, replaced by getMinimumSize(int, int).
protected String	paramString() Returns a string representing the state of this TextArea.
Dimension	preferredSize() Deprecated. As of JDK version 1.1, replaced by getPreferredSize().
Dimension	preferredSize(int rows, int columns) Deprecated. As of JDK version 1.1, replaced by getPreferredSize(int, int).
void	replaceRange(String str, int start, int end) Replaces text between the indicated start and end positions with the specified replacement text.
void	replaceText(String str, int start, int end) Deprecated. As of JDK version 1.1, replaced by replaceRange(String, int, int).
void	setColumns(int columns) Sets the number of columns for this text area.
void	setRows(int rows) Sets the number of rows for this text area.

Methods inherited from class java.awt.TextComponent

addTextListener, enableInputMethods, getBackground, getCaretPosition, getInputMethodRequests, getListeners, getSelectedText, getSelectionEnd, getSelectionStart, getText, getTextListeners, isEditable, processEvent, processTextEvent, removeNotify, removeTextListener, select, selectAll, setBackground, setCaretPosition, setEditable, setSelectionEnd, setSelectionStart, setText

Methods inherited from class java.awt.Component

action, 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, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getAlignmentX, getAlignmentY, 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, getKeyListeners, getLocale, getLocation, getLocation, getLocationOnScreen, getMaximumSize, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, 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, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paint, paintAll, postEvent, prepareImage, prepareImage, print, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, reshape, resize, resize, revalidate, 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, wait, wait, wait

Field Detail

SCROLLBARS_BOTH

public static final int SCROLLBARS_BOTH

Create and display both vertical and horizontal scrollbars.

Since:

JDK1.1

See Also:

Constant Field Values

SCROLLBARS_VERTICAL_ONLY

public static final int SCROLLBARS_VERTICAL_ONLY

Create and display vertical scrollbar only.

Since:

JDK1.1

See Also:

Constant Field Values

SCROLLBARS_HORIZONTAL_ONLY

public static final int SCROLLBARS_HORIZONTAL_ONLY

Create and display horizontal scrollbar only.

Since:

JDK1.1

See Also:

Constant Field Values

SCROLLBARS_NONE

public static final int SCROLLBARS_NONE

Do not create or display any scrollbars for the text area.

Since:

JDK1.1

See Also:

Constant Field Values

Constructor Detail

TextArea

public TextArea()
         throws HeadlessException

Constructs a new text area with the empty string as text. This text area is created with scrollbar visibility equal to SCROLLBARS_BOTH, so both vertical and horizontal scrollbars will be visible for this text area.

Throws:

HeadlessException - if GraphicsEnvironment.isHeadless returns true

See Also:

GraphicsEnvironment.isHeadless()