The AccessibleAction 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 them.
Any object that can be manipulated should support this
interface. Applications can determine if an object supports the
AccessibleAction interface by first obtaining its AccessibleContext (see
Accessible
) and then calling the
AccessibleContext#getAccessibleAction
method. If the return value is not null, the object supports this interface.
An action which decrements a value.
An action which increments a value.
An action which causes a tree node to
collapse if expanded and expand if collapsed.
Performs the specified Action on the object
Returns the number of accessible actions available in this object
If there are more than one, the first one is considered the "default"
action of the object.
Returns a description of the specified action of the object.