import javax.accessibility.AccessibleRelation; //导入依赖的package包/类
/**
 * Returns the accessible relations of this AccessibleAbstractButton.
 * If the AbstractButton is part of a ButtonGroup, then all the buttons
 * in this button group are added as targets in a MEMBER_OF relation,
 * otherwise an empty relation set is returned (from super).
 *
 * @return the accessible relations of this AccessibleAbstractButton
 */
public AccessibleRelationSet getAccessibleRelationSet()
{
  AccessibleRelationSet relations = super.getAccessibleRelationSet();
  ButtonModel model = getModel();
  if (model instanceof DefaultButtonModel)
    {
      ButtonGroup group = ((DefaultButtonModel) model).getGroup();
      if (group != null)
        {
          Object[] target = new Object[group.getButtonCount()];
          Enumeration els = group.getElements();

          for (int index = 0; els.hasMoreElements(); ++index)
            {
              target[index] = els.nextElement();
            }

          AccessibleRelation rel =
            new AccessibleRelation(AccessibleRelation.MEMBER_OF);
          rel.setTarget(target);
          relations.add(rel);
        }
    }
  return relations;
}
 

import javax.accessibility.AccessibleRelation; //导入依赖的package包/类
/**
    * Sets the Accessibility MEMBER_OF property to denote that
    * these components work together as a group. Each object 
    * is set to be a MEMBER_OF an array that contains all of
    * the objects in the group, including itself.
    *
    * @param components The list of objects that are related
    */
   void buildAccessibleGroup(Vector components) {

AccessibleContext context = null;
int numComponents = components.size();
Object[] group = components.toArray();
Object object = null;
for (int i = 0; i < numComponents; ++i) {
    object = components.elementAt(i);
    if (object instanceof Accessible) {
        context = ((Accessible)components.elementAt(i)).
					 getAccessibleContext();
	context.getAccessibleRelationSet().add(
	    new AccessibleRelation(
		AccessibleRelation.MEMBER_OF, group));
    }
}
   }
 

import javax.accessibility.AccessibleRelation; //导入依赖的package包/类
/**
 * Returns the accessible relations of this AccessibleAbstractButton.
 * If the AbstractButton is part of a ButtonGroup, then all the buttons
 * in this button group are added as targets in a MEMBER_OF relation,
 * otherwise an empty relation set is returned (from super).
 *
 * @return the accessible relations of this AccessibleAbstractButton
 */
public AccessibleRelationSet getAccessibleRelationSet()
{
  AccessibleRelationSet relations = super.getAccessibleRelationSet();
  ButtonModel model = getModel();
  if (model instanceof DefaultButtonModel)
    {
      ButtonGroup group = ((DefaultButtonModel) model).getGroup();
      if (group != null)
        {
          Object[] target = new Object[group.getButtonCount()];
          Enumeration els = group.getElements();
          
          for (int index = 0; els.hasMoreElements(); ++index)
            {
              target[index] = els.nextElement();
            }

          AccessibleRelation rel =
            new AccessibleRelation(AccessibleRelation.MEMBER_OF);
          rel.setTarget(target);
          relations.add(rel);
        }
    }
  return relations;
}
 

import javax.accessibility.AccessibleRelation; //导入依赖的package包/类
/**
    * Sets up accessibility relationships to denote that one
    * object controls another. The CONTROLLER_FOR property is
    * set on the controller object, and the CONTROLLED_BY
    * property is set on the target object.
    *
    * @param controller the controller
    * @param target the target
    */
   private void setAccessibleController(JComponent controller,
				JComponent target) {
AccessibleRelationSet controllerRelations = 
    controller.getAccessibleContext().getAccessibleRelationSet();
AccessibleRelationSet targetRelations = 
    target.getAccessibleContext().getAccessibleRelationSet();

controllerRelations.add(
    new AccessibleRelation(
	AccessibleRelation.CONTROLLER_FOR, target));
targetRelations.add(
    new AccessibleRelation(
	AccessibleRelation.CONTROLLED_BY, controller));
   }
 

import javax.accessibility.AccessibleRelation; //导入依赖的package包/类
/**
    * Sets up accessibility relationships to denote that one 
    * object controls another. The CONTROLLER_FOR property is
    * set on the controller object, and the CONTROLLED_BY
    * property is set on the target object.
    */
   private void setAccessibleController(JComponent controller,
				JComponent target) {
AccessibleRelationSet controllerRelations = 
    controller.getAccessibleContext().getAccessibleRelationSet();
AccessibleRelationSet targetRelations = 
    target.getAccessibleContext().getAccessibleRelationSet();

controllerRelations.add(
    new AccessibleRelation(
	AccessibleRelation.CONTROLLER_FOR, target));
targetRelations.add(
    new AccessibleRelation(
	AccessibleRelation.CONTROLLED_BY, controller));
   }