import javax.accessibility.AccessibleIcon; //导入依赖的package包/类
public void testAccessibleImageIcon() {
    int width = 111;
    int height = 235;
    icon = new ImageIcon(new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB));
    
    AccessibleContext ac = icon.getAccessibleContext();
    AccessibleIcon ai = (AccessibleIcon)ac;

    assertEquals(ac.getAccessibleChildrenCount(), 0);
    assertNull(ac.getAccessibleChild(0));
    assertNull(ac.getAccessibleChild(10));
    assertNull(ac.getAccessibleChild(-1));

    assertNull(ac.getAccessibleParent());
    
    ac.setAccessibleParent(new ImageIcon());
    assertNull(ac.getAccessibleParent());
    assertNull(ac.getAccessibleStateSet());

    assertEquals("width", width, ai.getAccessibleIconWidth());
    assertEquals("height", height, ai.getAccessibleIconHeight());
}
 

import javax.accessibility.AccessibleIcon; //导入依赖的package包/类
/**
 * Returns the accessible icons of this object. If the AbstractButton's
 * icon is an Accessible, and it's AccessibleContext is an AccessibleIcon,
 * then this AccessibleIcon is returned, otherwise <code>null</code>.
 *
 * @return the accessible icons of this object, or <code>null</code> if
 *         there is no accessible icon
 */
public AccessibleIcon[] getAccessibleIcon()
{
  AccessibleIcon[] ret = null;
  Icon icon = getIcon();
  if (icon instanceof Accessible)
    {
      AccessibleContext ctx = ((Accessible) icon).getAccessibleContext();
      if (ctx instanceof AccessibleIcon)
        {
          ret = new AccessibleIcon[]{ (AccessibleIcon) ctx };
        }
    }
  return ret;
}
 

import javax.accessibility.AccessibleIcon; //导入依赖的package包/类
@Override
public AccessibleIcon[] getAccessibleIcon() {
    if (icon != null && icon instanceof ImageIcon) {
        return new AccessibleIcon[] { (AccessibleIcon) ((ImageIcon) icon)
                .getAccessibleContext() };
    }
    return null;
}
 

import javax.accessibility.AccessibleIcon; //导入依赖的package包/类
public AccessibleIcon[] getAccessibleIcon() {
    return new AccessibleIcon[0];
}
 

import javax.accessibility.AccessibleIcon; //导入依赖的package包/类
@Override
public AccessibleIcon[] getAccessibleIcon() {
	return delegate().getAccessibleIcon();
}