public class JEditorPane extends JTextComponent
This component uses implementations of the
EditorKit to accomplish its behavior. It effectively
morphs into the proper kind of text editor for the kind
of content it is given. The content type that editor is bound
to at any given time is determined by the EditorKit currently
installed. If the content is set to a new URL, its type is used
to determine the EditorKit that should be used to
load the content.
By default, the following types of content are known:
DefaultEditorKit that produces a wrapped plain text view.
javax.swing.text.html.HTMLEditorKit
which provides HTML 3.2 support.
javax.swing.text.rtf.RTFEditorKit
which provides a limited support of the Rich Text Format.
There are several ways to load content into this component.
setText method can be used to initialize
the component from a string. In this case the current
EditorKit will be used, and the content type will be
expected to be of this type.
read method can be used to initialize the
component from a Reader. Note that if the content type is HTML,
relative references (e.g. for things like images) can't be resolved
unless the <base> tag is used or the Base property
on HTMLDocument is set.
In this case the current EditorKit will be used,
and the content type will be expected to be of this type.
setPage method can be used to initialize
the component from a URL. In this case, the content type will be
determined from the URL, and the registered EditorKit
for that content type will be set.
Some kinds of content may provide hyperlink support by generating
hyperlink events. The HTML EditorKit will generate
hyperlink events if the JEditorPane is not editable
(JEditorPane.setEditable(false); has been called).
If HTML frames are embedded in the document, the typical response would be
to change a portion of the current document. The following code
fragment is a possible hyperlink listener implementation, that treats
HTML frame events specially, and simply displays any other activated
hyperlinks.
class Hyperactive implements HyperlinkListener {
public void hyperlinkUpdate(HyperlinkEvent e) {
if (e.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
JEditorPane pane = (JEditorPane) e.getSource();
if (e instanceof HTMLFrameHyperlinkEvent) {
HTMLFrameHyperlinkEvent evt = (HTMLFrameHyperlinkEvent)e;
HTMLDocument doc = (HTMLDocument)pane.getDocument();
doc.processHTMLFrameHyperlinkEvent(evt);
} else {
try {
pane.setPage(e.getURL());
} catch (Throwable t) {
t.printStackTrace();
}
}
}
}
}
For information on customizing how text/html is rendered please see
W3C_LENGTH_UNITS and HONOR_DISPLAY_PROPERTIES
Culturally dependent information in some documents is handled through
a mechanism called character encoding. Character encoding is an
unambiguous mapping of the members of a character set (letters, ideographs,
digits, symbols, or control functions) to specific numeric code values. It
represents the way the file is stored. Example character encodings are
ISO-8859-1, ISO-8859-5, Shift-jis, Euc-jp, and UTF-8. When the file is
passed to an user agent (JEditorPane) it is converted to
the document character set (ISO-10646 aka Unicode).
There are multiple ways to get a character set mapping to happen
with JEditorPane.
setContentType method. If the content
is loaded by the setPage method the content
type will have been set according to the specification of the URL.
It the file is loaded directly, the content type would be expected to
have been set prior to loading.
EditorKit.read operation throw a
ChangedCharSetException which will
be caught. The read is then restarted with a new Reader that uses
the character set specified in the ChangedCharSetException
(which is an IOException).
Warning: Swing is not thread safe. For more information see Swing's Threading Policy.
Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing. As of 1.4, support for long term storage
of all JavaBeansTM
has been added to the java.beans package.
Please see XMLEncoder.
| Modifier and Type | Class and Description |
|---|---|
protected class |
JEditorPane.AccessibleJEditorPane
This class implements accessibility support for the
JEditorPane class. |
protected class |
JEditorPane.AccessibleJEditorPaneHTML
This class provides support for
AccessibleHypertext,
and is used in instances where the EditorKit
installed in this JEditorPane is an instance of
HTMLEditorKit. |
protected class |
JEditorPane.JEditorPaneAccessibleHypertextSupport
What's returned by
AccessibleJEditorPaneHTML.getAccessibleText. |
JTextComponent.AccessibleJTextComponent, JTextComponent.DropLocation, JTextComponent.KeyBindingJComponent.AccessibleJComponentContainer.AccessibleAWTContainerComponent.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy| Modifier and Type | Field and Description |
|---|---|
static String |
HONOR_DISPLAY_PROPERTIES
Key for a client property used to indicate whether
the default font and foreground color from the component are
used if a font or foreground color is not specified in the styled
text.
|
static String |
W3C_LENGTH_UNITS
Key for a client property used to indicate whether
w3c compliant length units are used for html rendering.
|
DEFAULT_KEYMAP, FOCUS_ACCELERATOR_KEYaccessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOWBOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENTABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH| Constructor and Description |
|---|
JEditorPane()
Creates a new
JEditorPane. |
JEditorPane(String url)
Creates a
JEditorPane based on a string containing
a URL specification. |
JEditorPane(String type,
String text)
Creates a
JEditorPane that has been initialized
to the given text. |
JEditorPane(URL initialPage)
Creates a
JEditorPane based on a specified URL for input. |
| Modifier and Type | Method and Description |
|---|---|
void |
addHyperlinkListener(HyperlinkListener listener)
Adds a hyperlink listener for notification of any changes, for example
when a link is selected and entered.
|
protected EditorKit |
createDefaultEditorKit()
Creates the default editor kit (
PlainEditorKit) for when
the component is first created. |
static EditorKit |
createEditorKitForContentType(String type)
Creates a handler for the given type from the default registry
of editor kits.
|
void |
fireHyperlinkUpdate(HyperlinkEvent e)
Notifies all listeners that have registered interest for
notification on this event type.
|
AccessibleContext |
getAccessibleContext()
Gets the AccessibleContext associated with this JEditorPane.
|
String |
getContentType()
Gets the type of content that this editor
is currently set to deal with.
|
EditorKit |
getEditorKit()
Fetches the currently installed kit for handling content.
|
static String |
getEditorKitClassNameForContentType(String type)
Returns the currently registered
EditorKit
class name for the type type. |
EditorKit |
getEditorKitForContentType(String type)
Fetches the editor kit to use for the given type
of content.
|
HyperlinkListener[] |
getHyperlinkListeners()
Returns an array of all the
HyperLinkListeners added
to this JEditorPane with addHyperlinkListener(). |
URL |
getPage()
Gets the current URL being displayed.
|
Dimension |
getPreferredSize()
Returns the preferred size for the
JEditorPane. |
boolean |
getScrollableTracksViewportHeight()
Returns true if a viewport should always force the height of this
Scrollable to match the height of the viewport. |
boolean |
getScrollableTracksViewportWidth()
Returns true if a viewport should always force the width of this
Scrollable to match the width of the viewport. |
protected InputStream |
getStream(URL page)
Fetches a stream for the given URL, which is about to
be loaded by the
setPage method. |
String |
getText()
Returns the text contained in this
TextComponent
in terms of the
content type of this editor. |
String |
getUIClassID()
Gets the class ID for the UI.
|
protected String |
paramString()
Returns a string representation of this
JEditorPane. |
void |
read(InputStream in,
Object desc)
This method initializes from a stream.
|
static void |
registerEditorKitForContentType(String type,
String classname)
Establishes the default bindings of
type to
classname. |
static void |
registerEditorKitForContentType(String type,
String classname,
ClassLoader loader)
Establishes the default bindings of
type to
classname. |
void |
removeHyperlinkListener(HyperlinkListener listener)
Removes a hyperlink listener.
|
void |
replaceSelection(String content)
Replaces the currently selected content with new content
represented by the given string.
|
void |
scrollToReference(String reference)
Scrolls the view to the given reference location
(that is, the value returned by the
UL.getRef
method for the URL being displayed). |
void |
setContentType(String type)
Sets the type of content that this editor
handles.
|
void |
setEditorKit(EditorKit kit)
Sets the currently installed kit for handling
content.
|
void |
setEditorKitForContentType(String type,
EditorKit k)
Directly sets the editor kit to use for the given type.
|
void |
setPage(String url)
Sets the current URL being displayed.
|
void |
setPage(URL page)
Sets the current URL being displayed.
|
void |
setText(String t)
Sets the text of this
TextComponent to the specified
content,
which is expected to be in the format of the content type of
this editor. |
addCaretListener, addInputMethodListener, addKeymap, copy, cut, fireCaretUpdate, getActions, getCaret, getCaretColor, getCaretListeners, getCaretPosition, getDisabledTextColor, getDocument, getDragEnabled, getDropLocation, getDropMode, getFocusAccelerator, getHighlighter, getInputMethodRequests, getKeymap, getKeymap, getMargin, getNavigationFilter, getPreferredScrollableViewportSize, getPrintable, getScrollableBlockIncrement, getScrollableUnitIncrement, getSelectedText, getSelectedTextColor, getSelectionColor, getSelectionEnd, getSelectionStart, getText, getToolTipText, getUI, isEditable, loadKeymap, modelToView, moveCaretPosition, paste, print, print, print, processInputMethodEvent, read, removeCaretListener, removeKeymap, removeNotify, restoreComposedText, saveComposedText, select, selectAll, setCaret, setCaretColor, setCaretPosition, setComponentOrientation, setDisabledTextColor, setDocument, setDragEnabled, setDropMode, setEditable, setFocusAccelerator, setHighlighter, setKeymap, setMargin, setNavigationFilter, setSelectedTextColor, setSelectionColor, setSelectionEnd, setSelectionStart, setUI, updateUI, viewToModel, writeaddAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, updateadd, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusDownCycle, validate, validateTreeaction, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCyclepublic static final String W3C_LENGTH_UNITS
By default this is not enabled; to enable
it set the client property with this name
to Boolean.TRUE.
public static final String HONOR_DISPLAY_PROPERTIES
The default varies based on the look and feel;
to enable it set the client property with
this name to Boolean.TRUE.
public JEditorPane()
JEditorPane.
The document model is set to null.public JEditorPane(URL initialPage) throws IOException
JEditorPane based on a specified URL for input.initialPage - the URLIOException - if the URL is null
or cannot be accessedpublic JEditorPane(String url) throws IOException
JEditorPane based on a string containing
a URL specification.url - the URLIOException - if the URL is null or
cannot be accessedpublic JEditorPane(String type, String text)
JEditorPane that has been initialized
to the given text. This is a convenience constructor that calls the
setContentType and setText methods.type - mime type of the given texttext - the text to initialize with; may be nullNullPointerException - if the type parameter
is nullpublic void addHyperlinkListener(HyperlinkListener listener)
listener - the listenerpublic void removeHyperlinkListener(HyperlinkListener listener)
listener - the listenerpublic HyperlinkListener[] getHyperlinkListeners()
HyperLinkListeners added
to this JEditorPane with addHyperlinkListener().HyperLinkListeners added or an empty
array if no listeners have been addedpublic void fireHyperlinkUpdate(HyperlinkEvent e)
EditorKit if a content type
that supports hyperlinks is currently active and there
was activity with a link. The listener list is processed
last to first.e - the eventEventListenerListpublic void setPage(URL page) throws IOException
null, then
a new default document is created and the URL is read into it.
If the URL contains and reference location, the location will
be scrolled to by calling the scrollToReference
method. If the desired URL is the one currently being displayed,
the document will not be reloaded. To force a document
reload it is necessary to clear the stream description property
of the document. The following code shows how this can be done:
Document doc = jEditorPane.getDocument(); doc.putProperty(Document.StreamDescriptionProperty, null);If the desired URL is not the one currently being displayed, the
getStream method is called to
give subclasses control over the stream provided.
This may load either synchronously or asynchronously
depending upon the document returned by the EditorKit.
If the Document is of type
AbstractDocument and has a value returned by
AbstractDocument.getAsynchronousLoadPriority
that is greater than or equal to zero, the page will be
loaded on a separate thread using that priority.
If the document is loaded synchronously, it will be
filled in with the stream prior to being installed into
the editor with a call to setDocument, which
is bound and will fire a property change event. If an
IOException is thrown the partially loaded
document will
be discarded and neither the document or page property
change events will be fired. If the document is
successfully loaded and installed, a view will be
built for it by the UI which will then be scrolled if
necessary, and then the page property change event
will be fired.
If the document is loaded asynchronously, the document
will be installed into the editor immediately using a
call to setDocument which will fire a
document property change event, then a thread will be
created which will begin doing the actual loading.
In this case, the page property change event will not be
fired by the call to this method directly, but rather will be
fired when the thread doing the loading has finished.
It will also be fired on the event-dispatch thread.
Since the calling thread can not throw an IOException
in the event of failure on the other thread, the page
property change event will be fired when the other
thread is done whether the load was successful or not.
page - the URL of the pageIOException - for a null or invalid
page specification, or exception from the stream being readgetPage()public void read(InputStream in, Object desc) throws IOException
HTMLEditorKit, and the
desc parameter is an HTMLDocument,
then it invokes the HTMLEditorKit to initiate
the read. Otherwise it calls the superclass
method which loads the model as plain text.in - the stream from which to readdesc - an object describing the streamIOException - as thrown by the stream being
used to initializeJTextComponent.read(java.io.Reader, java.lang.Object),
JTextComponent.setDocument(javax.swing.text.Document)protected InputStream getStream(URL page) throws IOException
setPage method. By
default, this simply opens the URL and returns the
stream. This can be reimplemented to do useful things
like fetch the stream from a cache, monitor the progress
of the stream, etc.
This method is expected to have the the side effect of
establishing the content type, and therefore setting the
appropriate EditorKit to use for loading the stream.
If this the stream was an http connection, redirects
will be followed and the resulting URL will be set as
the Document.StreamDescriptionProperty so that relative
URL's can be properly resolved.
page - the URL of the pageIOExceptionpublic void scrollToReference(String reference)
UL.getRef
method for the URL being displayed). By default, this
method only knows how to locate a reference in an
HTMLDocument. The implementation calls the
scrollRectToVisible method to
accomplish the actual scrolling. If scrolling to a
reference location is needed for document types other
than HTML, this method should be reimplemented.
This method will have no effect if the component
is not visible.reference - the named location to scroll topublic URL getPage()
null, and relative URL's will not be
resolved.null if nonepublic void setPage(String url) throws IOException
url - the URL for displayIOException - for a null or invalid URL
specificationpublic String getUIClassID()
getUIClassID in class JComponentJComponent.getUIClassID(),
UIDefaults.getUI(javax.swing.JComponent)protected EditorKit createDefaultEditorKit()
PlainEditorKit) for when
the component is first created.public EditorKit getEditorKit()
createDefaultEditorKit is called to set up a default
if necessary.public final String getContentType()
EditorKit.null if no editor kit setpublic final void setContentType(String type)
getEditorKitForContentType,
and then setEditorKit if an editor kit can
be successfully located. This is mostly convenience method
that can be used as an alternative to calling
setEditorKit directly.
If there is a charset definition specified as a parameter
of the content type specification, it will be used when
loading input streams using the associated EditorKit.
For example if the type is specified as
text/html; charset=EUC-JP the content
will be loaded using the EditorKit registered for
text/html and the Reader provided to
the EditorKit to load unicode into the document will
use the EUC-JP charset for translating
to unicode. If the type is not recognized, the content
will be loaded using the EditorKit registered
for plain text, text/plain.
type - the non-null mime type for the content editing
supportNullPointerException - if the type parameter
is nullgetContentType()public void setEditorKit(EditorKit kit)
null,
the new kit is installed, and a default document created for it.
A PropertyChange event ("editorKit") is always fired when
setEditorKit is called.
NOTE: This has the side effect of changing the model,
because the EditorKit is the source of how a
particular type
of content is modeled. This method will cause setDocument
to be called on behalf of the caller to ensure integrity
of the internal state.
kit - the desired editor behaviorgetEditorKit()public EditorKit getEditorKitForContentType(String type)
EditorKit registered
for the given type, it will try to create an
EditorKit from the default EditorKit registry.
If that fails, a PlainEditorKit is used on the
assumption that all text documents can be represented
as plain text.
This method can be reimplemented to use some other kind of type registry. This can be reimplemented to use the Java Activation Framework, for example.
type - the non-null content typepublic void setEditorKitForContentType(String type, EditorKit k)
createEditorKitForContentType to install handlers for
content types with a look-and-feel bias.type - the non-null content typek - the editor kit to be setpublic void replaceSelection(String content)
null) this amounts to a removal of the
current selection. The replacement text will have the
attributes currently defined for input. If the component is not
editable, beep and return.replaceSelection in class JTextComponentcontent - the content to replace the selection with. This
value can be nullpublic static EditorKit createEditorKitForContentType(String type)
ClassLoader,
that ClassLoader will be used to load the prototype.
If there was no registered ClassLoader,
Class.forName will be used to load the prototype.
Once a prototype EditorKit instance is successfully
located, it is cloned and the clone is returned.
type - the content typenull if there is nothing
registered for the given typepublic static void registerEditorKitForContentType(String type, String classname)
type to
classname.
The class will be dynamically loaded later when actually
needed, and can be safely changed before attempted uses
to avoid loading unwanted classes. The prototype
EditorKit will be loaded with Class.forName
when registered with this method.type - the non-null content typeclassname - the class to load laterpublic static void registerEditorKitForContentType(String type, String classname, ClassLoader loader)
type to
classname.
The class will be dynamically loaded later when actually
needed using the given ClassLoader,
and can be safely changed
before attempted uses to avoid loading unwanted classes.type - the non-null content typeclassname - the class to load laterloader - the ClassLoader to use to load the namepublic static String getEditorKitClassNameForContentType(String type)
EditorKit
class name for the type type.type - the non-null content typepublic Dimension getPreferredSize()
JEditorPane.
The preferred size for JEditorPane is slightly altered
from the preferred size of the superclass. If the size
of the viewport has become smaller than the minimum size
of the component, the scrollable definition for tracking
width or height will turn to false. The default viewport
layout will give the preferred size, and that is not desired
in the case where the scrollable is tracking. In that case
the normal preferred size is adjusted to the
minimum size. This allows things like HTML tables to
shrink down to their minimum size and then be laid out at
their minimum size, refusing to shrink any further.getPreferredSize in class JComponentDimension containing the preferred sizeJComponent.setPreferredSize(java.awt.Dimension),
ComponentUIpublic void setText(String t)
TextComponent to the specified
content,
which is expected to be in the format of the content type of
this editor. For example, if the type is set to text/html
the string should be specified in terms of HTML.
This is implemented to remove the contents of the current document,
and replace them by parsing the given string using the current
EditorKit. This gives the semantics of the
superclass by not changing
out the model, while supporting the content type currently set on
this component. The assumption is that the previous content is
relatively
small, and that the previous content doesn't have side effects.
Both of those assumptions can be violated and cause undesirable results.
To avoid this, create a new document,
getEditorKit().createDefaultDocument(), and replace the
existing Document with the new one. You are then assured the
previous Document won't have any lingering state.
An alternative way to load this component with a string would be to create a StringReader and call the read method. In this case the model would be replaced after it was initialized with the contents of the string.
setText in class JTextComponentt - the new text to be set; if null the old
text will be deletedgetText()public String getText()
TextComponent
in terms of the
content type of this editor. If an exception is thrown while
attempting to retrieve the text, null will be returned.
This is implemented to call JTextComponent.write with
a StringWriter.getText in class JTextComponentsetText(java.lang.String)public boolean getScrollableTracksViewportWidth()
Scrollable to match the width of the viewport.getScrollableTracksViewportWidth in interface ScrollablegetScrollableTracksViewportWidth in class JTextComponentpublic boolean getScrollableTracksViewportHeight()
Scrollable to match the height of the viewport.getScrollableTracksViewportHeight in interface ScrollablegetScrollableTracksViewportHeight in class JTextComponentScrollable's height to match its own,
false otherwiseprotected String paramString()
JEditorPane.
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 JTextComponentJEditorPanepublic AccessibleContext getAccessibleContext()
getAccessibleContext in interface AccessiblegetAccessibleContext in class JTextComponent