java.lang.Object
java.awt.Component
java.awt.TextComponent
java.awt.TextArea
public class TextArea
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);
TextArea()
TextArea(int rows, int columns)
TextArea(String text)
TextArea(String text, int rows, int columns)
TextArea(String text, int rows, int columns, int scrollbars)
void addNotify()
TextArea's peer. void append(String str)
void appendText(String str)
append(String). AccessibleContext getAccessibleContext()
AccessibleContext associated with this TextArea. int getColumns()
Dimension getMinimumSize()
Dimension getMinimumSize(int rows, int columns)
Dimension getPreferredSize()
Dimension getPreferredSize(int rows, int columns)
int getRows()
int getScrollbarVisibility()
void insert(String str, int pos)
void insertText(String str, int pos)
insert(String, int). Dimension minimumSize()
getMinimumSize(). Dimension minimumSize(int rows, int columns)
getMinimumSize(int, int). protected String paramString()
TextArea. Dimension preferredSize()
getPreferredSize(). Dimension preferredSize(int rows, int columns)
getPreferredSize(int, int). void replaceRange(String str, int start, int end)
void replaceText(String str, int start, int end)
replaceRange(String, int, int). void setColumns(int columns)
void setRows(int rows)
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, 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, 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 SCROLLBARS_BOTH
public static final int SCROLLBARS_BOTH
public static final int SCROLLBARS_VERTICAL_ONLY
public static final int SCROLLBARS_HORIZONTAL_ONLY
public static final int SCROLLBARS_NONE
public TextArea()
throws HeadlessException
SCROLLBARS_BOTH, so both vertical and horizontal scrollbars will be visible for this text area.
HeadlessException - if GraphicsEnvironment.isHeadless returns true
GraphicsEnvironment.isHeadless()
public TextArea(String text)
throws HeadlessException
SCROLLBARS_BOTH, so both vertical and horizontal scrollbars will be visible for this text area.
text - the text to be displayed; if text is null, the empty string "" will be displayed
HeadlessException - if GraphicsEnvironment.isHeadless returns true
GraphicsEnvironment.isHeadless()
public TextArea(int rows,
int columns)
throws HeadlessException
SCROLLBARS_BOTH, so both vertical and horizontal scrollbars will be visible for this text area.
rows - the number of rows
columns - the number of columns
HeadlessException - if GraphicsEnvironment.isHeadless returns true
GraphicsEnvironment.isHeadless()
public TextArea(String text,
int rows,
int columns)
throws HeadlessException
SCROLLBARS_BOTH, so both vertical and horizontal scrollbars will be visible for this text area.
text - the text to be displayed; if text is null, the empty string "" will be displayed
rows - the number of rows
columns - the number of columns
HeadlessException - if GraphicsEnvironment.isHeadless returns true
GraphicsEnvironment.isHeadless()
public TextArea(String text,
int rows,
int columns,
int scrollbars)
throws HeadlessException
TextArea constructors defer to this one.
The TextArea class defines several constants that can be supplied as values for the scrollbars argument:
SCROLLBARS_BOTH,SCROLLBARS_VERTICAL_ONLY,SCROLLBARS_HORIZONTAL_ONLY,SCROLLBARS_NONE.scrollbars argument is invalid and will result in this text area being created with scrollbar visibility equal to the default value of SCROLLBARS_BOTH.
text - the text to be displayed; if text is null, the empty string "" will be displayed
rows - the number of rows; if rows is less than 0, rows is set to 0
columns - the number of columns; if columns is less than 0, columns is set to 0
scrollbars - a constant that determines what scrollbars are created to view the text area
HeadlessException - if GraphicsEnvironment.isHeadless returns true
GraphicsEnvironment.isHeadless()
public void addNotify()
TextArea's peer. The peer allows us to modify the appearance of the TextArea without changing any of its functionality.
addNotify in class TextComponent
TextComponent.removeNotify()
public void insert(String str,
int pos)
Note that passing null or inconsistent parameters is invalid and will result in unspecified behavior.
str - the non-null text to insert
pos - the position at which to insert
TextComponent.setText(java.lang.String), replaceRange(java.lang.String, int, int), append(java.lang.String)
@Deprecated
public void insertText(String str,
int pos)
insert(String, int).
public void append(String str)
Note that passing null or inconsistent parameters is invalid and will result in unspecified behavior.
str - the non-null text to append
insert(java.lang.String, int)
@Deprecated public void appendText(String str)
append(String).
public void replaceRange(String str,
int start,
int end)
Note that passing null or inconsistent parameters is invalid and will result in unspecified behavior.
str - the non-null text to use as the replacement
start - the start position
end - the end position
insert(java.lang.String, int)
@Deprecated
public void replaceText(String str,
int start,
int end)
replaceRange(String, int, int).
public int getRows()
setRows(int), getColumns()
public void setRows(int rows)
rows - the number of rows
IllegalArgumentException - if the value supplied for rows is less than 0
getRows(), setColumns(int)
public int getColumns()
setColumns(int), getRows()
public void setColumns(int columns)
columns - the number of columns
IllegalArgumentException - if the value supplied for columns is less than 0
getColumns(), setRows(int)
public int getScrollbarVisibility()
The TextArea class defines four integer constants that are used to specify which scroll bars are available. TextArea has one constructor that gives the application discretion over scroll bars.
SCROLLBARS_BOTH, SCROLLBARS_VERTICAL_ONLY, SCROLLBARS_HORIZONTAL_ONLY, SCROLLBARS_NONE, TextArea(java.lang.String, int, int, int)
public Dimension getPreferredSize(int rows,
int columns)
rows - the number of rows
columns - the number of columns
Component.getPreferredSize()
@Deprecated
public Dimension preferredSize(int rows,
int columns)
getPreferredSize(int, int).
public Dimension getPreferredSize()
getPreferredSize in class Component
Component.getPreferredSize()
@Deprecated public Dimension preferredSize()
getPreferredSize().
preferredSize in class Component
public Dimension getMinimumSize(int rows,
int columns)
rows - the number of rows
columns - the number of columns
Component.getMinimumSize()
@Deprecated
public Dimension minimumSize(int rows,
int columns)
getMinimumSize(int, int).
public Dimension getMinimumSize()
getMinimumSize in class Component
Component.getPreferredSize()
@Deprecated public Dimension minimumSize()
getMinimumSize().
minimumSize in class Component
protected String paramString()
TextArea. 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.
paramString in class TextComponent
public AccessibleContext getAccessibleContext()
AccessibleContext associated with this TextArea. For text areas, the AccessibleContext takes the form of an AccessibleAWTTextArea. A new AccessibleAWTTextArea instance is created if necessary.
getAccessibleContext in interface Accessible
getAccessibleContext in class TextComponent
AccessibleAWTTextArea that serves as the AccessibleContext of this TextArea
Copyright © 2004, 2010 Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.
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