Java Accessibility Guide > Java Accessibility API (JAAPI) Programmer's Guide > Accessibility Enhancements in Java 2 Platform, v1.4
The features described here were introduced in the Java 2 Platform, v1.4.0. These features are also part of subsequent releases of the Java 2 Platform.
Interface AccessibleExtendedComponent has a new method, getAccessibleKeyBinding, to return key bindings associated with an object.
Class AccessibleRole contains the following new constants:
This release adds accessibility support for HTML object tags. CTRL-t and SHIFT-CTRL-t navigate to the next and previous component, respectively, associated with an object tag in an HTML document. CTRL-SPACE activates the default action associated with the component.
Assistive technologies needed a way to track HTMLEditorKit keyboard link traversal. The constant AccessibleContext.ACCESSIBLE_HYPERTEXT_OFFSET was added to support this feature.
The javax.accessibility.assistive_technologies property specifies the assistive technologies to load into the JVM.
The javax.accessibility.screen_reader_present property, when set to true, lets the Java platform libraries know that a screen reader is present on the system. Application developers can check this property. If an application is self-voicing and a screen reader is present, developers can turn off the self-voicing.
The following new classes and interfaces have been added to the Java Accessibility API:
Interface AccessibleEditableText provides support for text editing by assistive technologies.
Interface AccessibleExtendedComponent provides the standard mechanism for an assistive technology to determine the extended graphical representation of an object.
Interface AccessibleExtendedTable provides extended information about a user-interface component that presents data in a two-dimensional table format.
Interface AccessibleKeyBinding provides the standard mechanism for an assistive technology to determine the key bindings which exist for an object.
This new feature provides support for easier tab navigation using mnemonics on a JTabbedPane.
This new feature provides support for list navigation using the first letter of list items.
This release provides accessibility support for HTML components in Swing.
The javax.accessibility.screen_magnifier_present property, when set to true, lets the Java platform libraries know that a screen magnifier is present on the system. Application developers can check this property, and if a screen magnifier is present, developers should make sure their applications are compatible with screen magnification.
