src/share/classes/javax/accessibility/package.html - toolchain/jdk/jdk9_jdk - Git at Google

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 Defines a contract between user-interface components and an assistive technology
 that provides access to those components. If a Java application fully supports
 the Java Accessibility API, then it should be compatible with, and friendly
 toward, assistive technologies such as screen readers, screen magnifiers,
 etc. With a Java application that fully supports the Java Accessibility
 API, no screen reader off screen model would be necessary because the API
 provides all of the information normally contained in an off screen model.

 <P>The Java Accessibility API package consists of 8 Java programming language
 interfaces, and 6 Java programming language classes. These are described
 below.
 <H3>
 <A NAME="Accessible"></A><A HREF="Accessible.html">Interface Accessible</A></H3>
 <A HREF="Accessible.html">Interface Accessible</A> is the main interface
 of the Java Accessibility API. All components that support the Java Accessibility
 API must implement this interface. It contains a single method, <TT>getAccessibleContext</TT>,
 that returns an instance of the class <A HREF="#AccessibleContext">AccessibleContext</A>.
 Sun thinks that implementing this interface is the absolute minimum requirement
 of every object that is part of the user interface of a Java application,
 if that program is to be compatible with assistive technologies.
 <H3>
 <A NAME="AccessibleContext"></A><A HREF="AccessibleContext.html">Class
 AccessibleContext</A></H3>
 <A HREF="AccessibleContext.html">AccessibleContext</A> represents the minimum
 information all accessible objects return and is obtained by calling the
 <TT>getAccessibleContext</TT> method on an object that implements the <A HREF="#Accessible">Accessible</A>
 interface. This information includes the accessible name, description,
 <A HREF="#AccessibleRole">role</A>, and <A HREF="#AccessibleState">state</A>
 of the object, as well as information about the parent and children of
 the object.&nbsp; In addition, JavaBeans <SUP><FONT SIZE=-2>TM</FONT></SUP>
 property change support is also included to allow assisitive technologies
 learn when the values of the accessible properties change. AccessibleContext
 also contains methods for obtaining more specific accessibility information
 about a component. If the component supports it, these methods will return
 an object that implements one or more of the following interfaces:
 <UL>
 <LI>
 <B><A HREF="#AccessibleAction">AccessibleAction</A></B> - the object can
 perform one or more actions. This interface provides the standard mechanism
 for an assistive technology to determine what those actions are and tell
 the object to perform those actions. Any object that can be manipulated
 should return an object that implements this interface when the <TT>getAccessibleAction</TT>
 method is called on an AccessibleContext.</LI>

 <LI>
 <B><A HREF="#AccessibleComponent">AccessibleComponent</A></B> - the object
 has a graphical representation. This interface provides the standard mechanism
 for an assistive technology to determine and set the graphical representation
 of the object. Any object that is rendered on the screen should return
 an object that implements this interface when the <TT>getAccessibleComponent</TT>
 method is called on an AccessibleContext.</LI>

 <LI>
 <B><A HREF="#AccessibleSelection">AccessibleSelection</A></B> - the object
 allows its children to be selected. This interface provides the standard
 mechanism for an assistive technology to determine the currently selected
 children as well as modify the selection set. Any object that has children
 that can be selected should return an object that implements this interface
 when the <TT>getAccessibleSelection</TT> method is called on an AccessibleContext.</LI>

 <LI>
 <B><A HREF="#AccessibleText">AccessibleText</A></B> - the object presents
 editable textual information on the display. This interface provides the
 standard mechanism for an assistive technology to access that text via
 its content, attributes, and spatial location. Any object that contains
 editable text should return an object that implements this interface when
 the <TT>getAccessibleText</TT> method is called on an AccessibleContext.</LI>

 <LI>
 <B><A HREF="#AccessibleHypertext">AccessibleHypertext</A></B> - the object
 presents hypertext information on the display. This interface provides
 the standard mechanism for an assistive technology to access that hypertext
 via its content, attributes, and spatial location. Any object that contains
 hypertext should return an object that implements this interface when the
 <TT>getAccessibleText</TT> method is called on an AccessibleContext.</LI>

 <LI>
 <B><A HREF="#AccessibleValue">AccessibleValue</A></B> - the object supports
 a numerical value. This interface provides the standard mechanism for an
 assistive technology to determine and set the current value of the object,
 as well as the minimum and maximum values. Any object that supports a numerical
 value should return an object that implements this interface when the <TT>getAccessibleValue</TT>
 method is called on an AccessibleContext.</LI>
 </UL>

 <H3>
 <A NAME="AccessibleRole"></A><A HREF="AccessibleRole.html">Class AccessibleRole</A></H3>
 This class encapsulates the Accessible object's role in the user interface
 and is obtained by calling the <TT>getAccessibleRole</TT> method on an
 <A HREF="#AccessibleContext">AccessibleContext</A>. Accessible roles include
 "Check box", "Menu Item", "Panel", etc. These roles are identified by the
 constants in this class such as <TT>AccessibleRole.CHECK_BOX, AccessibleRole.MENU_ITEM,</TT>
 and <TT>AccessibleRole.PANEL</TT>. The constants in this class present
 a strongly typed enumeration of common object roles. A public constructor
 for this class has been purposely omitted and applications should use one
 of the constants from this class. Although this class pre-defines a large
 list of standard roles, it is extensible so additional programmer-defined
 roles can be added in the future without needing to modify the base class.

 <H3>
 <A NAME="AccessibleState"></A><A HREF="AccessibleState.html">Class AccessibleState</A></H3>
 This class encapsulates a particular state of the Accessible object. Accessible
 states include things like "Armed", "Busy", "Checked", "Focused", etc.
 These roles are identified by the constants in this class such as <TT>AccessibleState.ARMED,
 AccessibleState.BUSY, AccessibleState.CHECKED,</TT> and <TT>AccessibleState.FOCUSED</TT>.
 The sum of all the states of an Accessible object is called the <A HREF="#AccessibleStateSet">AccessibleStateSet</A>,
 and can be obtained by calling the <TT>getAccessibleStateSet</TT> method
 on an <A HREF="#AccessibleContext">AccessibleContext</A>.

 <P>The constants in this class present a strongly typed enumeration of
 common object roles. A public constructor for this class has been purposely
 omitted and applications should use one of the constants from this class.
 Although this class pre-defines a large list of standard roles, it is extensible
 so additional, programmer-defined roles can be added in the future without
 needing to modify the base class.

 <H3>
 <A NAME="AccessibleStateSet"></A><A HREF="AccessibleStateSet.html">Class
 AccessibleStateSet</A></H3>
 This class encapsulates a collection of states of the Accessible object
 and is obtained by calling the <TT>getAccessibleStateSet</TT> method on
 an <A HREF="#AccessibleContext">AccessibleContext</A>. Since an object
 might have multiple states (e.g. it might be both "Checked" and "Focused"),
 this class is needed to encapsulate a collection of these states. Methods
 in the class provide for retrieving the individual <A HREF="#AccessibleState">AccessibleStates</A>
 on the state set.
 <H3>
 <A NAME="AccessibleBundle"></A><A HREF="AccessibleBundle.html">Class AccessibleBundle</A></H3>
 This class is used to maintain a strongly typed enumeration. It is the
 super class of both the <A HREF="#AccessibleRole">AccessibleRole</A> and
 <A HREF="#AccessibleState">AccessibleState</A> classes. Programmers normally
 do not interact with this class directly, but will instead use the <A HREF="#AccessibleRole">AccessibleRole</A>
 and <A HREF="#AccessibleState">AccessibleState</A> classes.

 <H3>
 <A NAME="AccessibleAction"></A><A HREF="AccessibleAction.html">Interface
 AccessibleAction</A></H3>
 The <A HREF="AccessibleAction.html">AccessibleAction</A> interface should
 be supported by any object that can perform one or more actions. This interface
 provides the standard mechanism for an assistive technology to determine
 what those actions are as well as tell the object to perform those actions.
 Any object that can be manipulated should support this interface.

 <P>Applications can determine if an object supports the AccessibleAction
 interface by first obtaining its <A HREF="#AccessibleContext">AccessibleContext</A>
 (see <A HREF="#Accessible">Accessible</A>) and then calling the <TT>getAccessibleAction</TT>
 method of <A HREF="#AccessibleContext">AccessibleContext</A>. If the return
 value is not null, the object supports this interface.
 <H3>
 <A NAME="AccessibleComponent"></A><A HREF="AccessibleComponent.html">Interface
 AccessibleComponent</A></H3>
 The <A HREF="AccessibleComponent.html">AccessibleComponent</A> interface
 should be supported by any object that is rendered on the screen. This
 interface provides the standard mechanism for an assistive technology to
 determine and set the graphical representation of an object.

 <P>Applications can determine if an object supports the AccessibleComponent
 interface by first obtaining its <A HREF="#AccessibleContext">AccessibleContext</A>
 (see <A HREF="#Accessible">Accessible</A>) and then calling the <TT>getAccessibleComponent</TT>
 method of <A HREF="#AccessibleContext">AccessibleContext</A>. If the return
 value is not null, the object supports this interface.
 <H3>
 <A NAME="AccessibleSelection"></A><A HREF="AccessibleSelection.html">Interface
 AccessibleSelection</A></H3>
 The <A HREF="AccessibleSelection.html">AccessibleSelection</A> interface
 provides the standard mechanism for an assistive technology to determine
 what the current selected children are, as well as modify the selection
 set. Any object that has children that can be selected should support this
 the AccessibleSelection interface.

 <P>Applications can determine if an object supports the AccessibleSelection
 interface by first obtaining its <A HREF="#AccessibleContext">AccessibleContext</A>
 (see <A HREF="#Accessible">Accessible</A>) and then calling the <TT>getAccessibleSelection</TT>
 method of <A HREF="#AccessibleContext">AccessibleContext</A>. If the return
 value is not null, the object supports this interface.
 <H3>
 <A NAME="AccessibleText"></A><A HREF="AccessibleText.html">Interface AccessibleText</A></H3>
 Interface <A HREF="AccessibleText.html">AccessibleText</A> is the contract
 for making rich, editable text Accessible. Not all text displayed on the
 screen is rich and editable (e.g. text contained in buttons, labels, menus,
 etc., which users aren't expected to manipulate). However, objects containing
 editable text must implement interface AccessibleText if they are to interoperate
 with assistive technologies.

 <P>This interface provides support for going between pixel coordinates
 and the text at a given pixel coordinate, for retrieving the letter, word,
 and sentence at, before, or after a given position in the text. This interface
 provides support for retrieving the attributes of the character at a given
 position in the text (font, font size, style, etc.), as well as getting
 the selected text (if any), the length of the text, and the location of
 the text caret.

 <P>Applications can determine if an object supports the AccessibleText
 interface by first obtaining its <A HREF="#AccessibleContext">AccessibleContext</A>
 (see <A HREF="#Accessible">Accessible</A>) and then calling the <TT>getAccessibleText</TT>
 method of <A HREF="#AccessibleContext">AccessibleContext</A>. If the return
 value is not null, the object supports this interface.
 <H3><A NAME="AccessibleHypertext"></A>
 <A HREF="AccessibleHypertext.html">Interface AccessibleHypertext</A></H3>
 The <A HREF="AccessibleHypertext.html">AccessibleHypertext</A> interface
 should be supported by any object that presents hypertext information on
 the display. This interface provides the standard mechanism for an assistive
 technology to access that text via its content, attributes, and spatial
 location. It also provides standard mechanisms for manipulating <A HREF="#AccessibleHyperlink">hyperlinks</A>.
 Applications can determine if an object supports the AccessibleHypertext
 interface by first obtaining its <A HREF="#AccessibleContext">AccessibleContext</A>
 (see <A HREF="#Accessible">Accessible</A>) and then calling the AccessibleContext.getAccessibleText()
 method of <A HREF="#AccessibleContext">AccessibleContext</A>. If the return
 value is a class which extends AccessibleHypertext, then that object supports
 AccessibleHypertext.
 <H3>
 <A NAME="AccessibleHyperlink"></A><A HREF="AccessibleHyperlink.html">Interface
 AccessibleHyperlink</A></H3>
 An object that is a hyperlink should support the <A HREF="AccessibleHyperlink.html">AccessibleHyperlink</A>
 interface.&nbsp; An object that implements this interface will be returned
 by calling the getLink method on an <A HREF="#AccessibleHypertext">AccessibleHypertext</A>
 object.
 <H3>
 <A NAME="AccessibleValue"></A><A HREF="AccessibleValue.html">Interface
 AccessibleValue</A></H3>
 The <A HREF="AccessibleValue.html">AccessibleValue</A> interface should
 be supported by any object that supports a numerical value (e.g., a scroll
 bar). This interface provides the standard mechanism for an assistive technology
 to determine and set the numerical value as well as get the minimum and
 maximum values.

 <P>Applications can determine if an object supports the AccessibleValue
 interface by first obtaining its <A HREF="#AccessibleContext">AccessibleContext</A>
 (see <A HREF="#Accessible">Accessible</A>) and then calling the <TT>getAccessibleValue</TT>
 method of <A HREF="#AccessibleContext">AccessibleContext</A>. If the return
 value is not null, the object supports this interface.

 @since 1.2
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	particular file as subject to the "Classpath" exception as provided
	by Oracle in the LICENSE file that accompanied this code.

	This code is distributed in the hope that it will be useful, but WITHOUT
	ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	version 2 for more details (a copy is included in the LICENSE file that
	accompanied this code).

	You should have received a copy of the GNU General Public License version
	2 along with this work; if not, write to the Free Software Foundation,
	Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

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	CA 95054 USA or visit www.sun.com if you need additional information or
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	Defines a contract between user-interface components and an assistive technology
	that provides access to those components. If a Java application fully supports
	the Java Accessibility API, then it should be compatible with, and friendly
	toward, assistive technologies such as screen readers, screen magnifiers,
	etc. With a Java application that fully supports the Java Accessibility
	API, no screen reader off screen model would be necessary because the API
	provides all of the information normally contained in an off screen model.

	<P>The Java Accessibility API package consists of 8 Java programming language
	interfaces, and 6 Java programming language classes. These are described
	below.
	<H3>
	<A NAME="Accessible"></A><A HREF="Accessible.html">Interface Accessible</A></H3>
	<A HREF="Accessible.html">Interface Accessible</A> is the main interface
	of the Java Accessibility API. All components that support the Java Accessibility
	API must implement this interface. It contains a single method, <TT>getAccessibleContext</TT>,
	that returns an instance of the class <A HREF="#AccessibleContext">AccessibleContext</A>.
	Sun thinks that implementing this interface is the absolute minimum requirement
	of every object that is part of the user interface of a Java application,
	if that program is to be compatible with assistive technologies.
	<H3>
	<A NAME="AccessibleContext"></A><A HREF="AccessibleContext.html">Class
	AccessibleContext</A></H3>
	<A HREF="AccessibleContext.html">AccessibleContext</A> represents the minimum
	information all accessible objects return and is obtained by calling the
	<TT>getAccessibleContext</TT> method on an object that implements the <A HREF="#Accessible">Accessible</A>
	interface. This information includes the accessible name, description,
	<A HREF="#AccessibleRole">role</A>, and <A HREF="#AccessibleState">state</A>
	of the object, as well as information about the parent and children of
	the object.  In addition, JavaBeans <SUP><FONT SIZE=-2>TM</FONT></SUP>
	property change support is also included to allow assisitive technologies
	learn when the values of the accessible properties change. AccessibleContext
	also contains methods for obtaining more specific accessibility information
	about a component. If the component supports it, these methods will return
	an object that implements one or more of the following interfaces:
	<UL>
	<LI>
	<B><A HREF="#AccessibleAction">AccessibleAction</A></B> - the object can
	perform one or more actions. This interface provides the standard mechanism
	for an assistive technology to determine what those actions are and tell
	the object to perform those actions. Any object that can be manipulated
	should return an object that implements this interface when the <TT>getAccessibleAction</TT>
	method is called on an AccessibleContext.</LI>

	<LI>
	<B><A HREF="#AccessibleComponent">AccessibleComponent</A></B> - the object
	has a graphical representation. This interface provides the standard mechanism
	for an assistive technology to determine and set the graphical representation
	of the object. Any object that is rendered on the screen should return
	an object that implements this interface when the <TT>getAccessibleComponent</TT>
	method is called on an AccessibleContext.</LI>

	<LI>
	<B><A HREF="#AccessibleSelection">AccessibleSelection</A></B> - the object
	allows its children to be selected. This interface provides the standard
	mechanism for an assistive technology to determine the currently selected
	children as well as modify the selection set. Any object that has children
	that can be selected should return an object that implements this interface
	when the <TT>getAccessibleSelection</TT> method is called on an AccessibleContext.</LI>

	<LI>
	<B><A HREF="#AccessibleText">AccessibleText</A></B> - the object presents
	editable textual information on the display. This interface provides the
	standard mechanism for an assistive technology to access that text via
	its content, attributes, and spatial location. Any object that contains
	editable text should return an object that implements this interface when
	the <TT>getAccessibleText</TT> method is called on an AccessibleContext.</LI>

	<LI>
	<B><A HREF="#AccessibleHypertext">AccessibleHypertext</A></B> - the object
	presents hypertext information on the display. This interface provides
	the standard mechanism for an assistive technology to access that hypertext
	via its content, attributes, and spatial location. Any object that contains
	hypertext should return an object that implements this interface when the
	<TT>getAccessibleText</TT> method is called on an AccessibleContext.</LI>

	<LI>
	<B><A HREF="#AccessibleValue">AccessibleValue</A></B> - the object supports
	a numerical value. This interface provides the standard mechanism for an
	assistive technology to determine and set the current value of the object,
	as well as the minimum and maximum values. Any object that supports a numerical
	value should return an object that implements this interface when the <TT>getAccessibleValue</TT>
	method is called on an AccessibleContext.</LI>
	</UL>

	<H3>
	<A NAME="AccessibleRole"></A><A HREF="AccessibleRole.html">Class AccessibleRole</A></H3>
	This class encapsulates the Accessible object's role in the user interface
	and is obtained by calling the <TT>getAccessibleRole</TT> method on an
	<A HREF="#AccessibleContext">AccessibleContext</A>. Accessible roles include
	"Check box", "Menu Item", "Panel", etc. These roles are identified by the
	constants in this class such as <TT>AccessibleRole.CHECK_BOX, AccessibleRole.MENU_ITEM,</TT>
	and <TT>AccessibleRole.PANEL</TT>. The constants in this class present
	a strongly typed enumeration of common object roles. A public constructor
	for this class has been purposely omitted and applications should use one
	of the constants from this class. Although this class pre-defines a large
	list of standard roles, it is extensible so additional programmer-defined
	roles can be added in the future without needing to modify the base class.

	<H3>
	<A NAME="AccessibleState"></A><A HREF="AccessibleState.html">Class AccessibleState</A></H3>
	This class encapsulates a particular state of the Accessible object. Accessible
	states include things like "Armed", "Busy", "Checked", "Focused", etc.
	These roles are identified by the constants in this class such as <TT>AccessibleState.ARMED,
	AccessibleState.BUSY, AccessibleState.CHECKED,</TT> and <TT>AccessibleState.FOCUSED</TT>.
	The sum of all the states of an Accessible object is called the <A HREF="#AccessibleStateSet">AccessibleStateSet</A>,
	and can be obtained by calling the <TT>getAccessibleStateSet</TT> method
	on an <A HREF="#AccessibleContext">AccessibleContext</A>.

	<P>The constants in this class present a strongly typed enumeration of
	common object roles. A public constructor for this class has been purposely
	omitted and applications should use one of the constants from this class.
	Although this class pre-defines a large list of standard roles, it is extensible
	so additional, programmer-defined roles can be added in the future without
	needing to modify the base class.

	<H3>
	<A NAME="AccessibleStateSet"></A><A HREF="AccessibleStateSet.html">Class
	AccessibleStateSet</A></H3>
	This class encapsulates a collection of states of the Accessible object
	and is obtained by calling the <TT>getAccessibleStateSet</TT> method on
	an <A HREF="#AccessibleContext">AccessibleContext</A>. Since an object
	might have multiple states (e.g. it might be both "Checked" and "Focused"),
	this class is needed to encapsulate a collection of these states. Methods
	in the class provide for retrieving the individual <A HREF="#AccessibleState">AccessibleStates</A>
	on the state set.
	<H3>
	<A NAME="AccessibleBundle"></A><A HREF="AccessibleBundle.html">Class AccessibleBundle</A></H3>
	This class is used to maintain a strongly typed enumeration. It is the
	super class of both the <A HREF="#AccessibleRole">AccessibleRole</A> and
	<A HREF="#AccessibleState">AccessibleState</A> classes. Programmers normally
	do not interact with this class directly, but will instead use the <A HREF="#AccessibleRole">AccessibleRole</A>
	and <A HREF="#AccessibleState">AccessibleState</A> classes.

	<H3>
	<A NAME="AccessibleAction"></A><A HREF="AccessibleAction.html">Interface
	AccessibleAction</A></H3>
	The <A HREF="AccessibleAction.html">AccessibleAction</A> interface should
	be supported by any object that can perform one or more actions. This interface
	provides the standard mechanism for an assistive technology to determine
	what those actions are as well as tell the object to perform those actions.
	Any object that can be manipulated should support this interface.

	<P>Applications can determine if an object supports the AccessibleAction
	interface by first obtaining its <A HREF="#AccessibleContext">AccessibleContext</A>
	(see <A HREF="#Accessible">Accessible</A>) and then calling the <TT>getAccessibleAction</TT>
	method of <A HREF="#AccessibleContext">AccessibleContext</A>. If the return
	value is not null, the object supports this interface.
	<H3>
	<A NAME="AccessibleComponent"></A><A HREF="AccessibleComponent.html">Interface
	AccessibleComponent</A></H3>
	The <A HREF="AccessibleComponent.html">AccessibleComponent</A> interface
	should be supported by any object that is rendered on the screen. This
	interface provides the standard mechanism for an assistive technology to
	determine and set the graphical representation of an object.

	<P>Applications can determine if an object supports the AccessibleComponent
	interface by first obtaining its <A HREF="#AccessibleContext">AccessibleContext</A>
	(see <A HREF="#Accessible">Accessible</A>) and then calling the <TT>getAccessibleComponent</TT>
	method of <A HREF="#AccessibleContext">AccessibleContext</A>. If the return
	value is not null, the object supports this interface.
	<H3>
	<A NAME="AccessibleSelection"></A><A HREF="AccessibleSelection.html">Interface
	AccessibleSelection</A></H3>
	The <A HREF="AccessibleSelection.html">AccessibleSelection</A> interface
	provides the standard mechanism for an assistive technology to determine
	what the current selected children are, as well as modify the selection
	set. Any object that has children that can be selected should support this
	the AccessibleSelection interface.

	<P>Applications can determine if an object supports the AccessibleSelection
	interface by first obtaining its <A HREF="#AccessibleContext">AccessibleContext</A>
	(see <A HREF="#Accessible">Accessible</A>) and then calling the <TT>getAccessibleSelection</TT>
	method of <A HREF="#AccessibleContext">AccessibleContext</A>. If the return
	value is not null, the object supports this interface.
	<H3>
	<A NAME="AccessibleText"></A><A HREF="AccessibleText.html">Interface AccessibleText</A></H3>
	Interface <A HREF="AccessibleText.html">AccessibleText</A> is the contract
	for making rich, editable text Accessible. Not all text displayed on the
	screen is rich and editable (e.g. text contained in buttons, labels, menus,
	etc., which users aren't expected to manipulate). However, objects containing
	editable text must implement interface AccessibleText if they are to interoperate
	with assistive technologies.

	<P>This interface provides support for going between pixel coordinates
	and the text at a given pixel coordinate, for retrieving the letter, word,
	and sentence at, before, or after a given position in the text. This interface
	provides support for retrieving the attributes of the character at a given
	position in the text (font, font size, style, etc.), as well as getting
	the selected text (if any), the length of the text, and the location of
	the text caret.

	<P>Applications can determine if an object supports the AccessibleText
	interface by first obtaining its <A HREF="#AccessibleContext">AccessibleContext</A>
	(see <A HREF="#Accessible">Accessible</A>) and then calling the <TT>getAccessibleText</TT>
	method of <A HREF="#AccessibleContext">AccessibleContext</A>. If the return
	value is not null, the object supports this interface.
	<H3><A NAME="AccessibleHypertext"></A>
	<A HREF="AccessibleHypertext.html">Interface AccessibleHypertext</A></H3>
	The <A HREF="AccessibleHypertext.html">AccessibleHypertext</A> interface
	should be supported by any object that presents hypertext information on
	the display. This interface provides the standard mechanism for an assistive
	technology to access that text via its content, attributes, and spatial
	location. It also provides standard mechanisms for manipulating <A HREF="#AccessibleHyperlink">hyperlinks</A>.
	Applications can determine if an object supports the AccessibleHypertext
	interface by first obtaining its <A HREF="#AccessibleContext">AccessibleContext</A>
	(see <A HREF="#Accessible">Accessible</A>) and then calling the AccessibleContext.getAccessibleText()
	method of <A HREF="#AccessibleContext">AccessibleContext</A>. If the return
	value is a class which extends AccessibleHypertext, then that object supports
	AccessibleHypertext.
	<H3>
	<A NAME="AccessibleHyperlink"></A><A HREF="AccessibleHyperlink.html">Interface
	AccessibleHyperlink</A></H3>
	An object that is a hyperlink should support the <A HREF="AccessibleHyperlink.html">AccessibleHyperlink</A>
	interface.  An object that implements this interface will be returned
	by calling the getLink method on an <A HREF="#AccessibleHypertext">AccessibleHypertext</A>
	object.
	<H3>
	<A NAME="AccessibleValue"></A><A HREF="AccessibleValue.html">Interface
	AccessibleValue</A></H3>
	The <A HREF="AccessibleValue.html">AccessibleValue</A> interface should
	be supported by any object that supports a numerical value (e.g., a scroll
	bar). This interface provides the standard mechanism for an assistive technology
	to determine and set the numerical value as well as get the minimum and
	maximum values.

	<P>Applications can determine if an object supports the AccessibleValue
	interface by first obtaining its <A HREF="#AccessibleContext">AccessibleContext</A>
	(see <A HREF="#Accessible">Accessible</A>) and then calling the <TT>getAccessibleValue</TT>
	method of <A HREF="#AccessibleContext">AccessibleContext</A>. If the return
	value is not null, the object supports this interface.

	@since 1.2
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