open/src/java.desktop/share/classes/java/awt/TrayIcon.java:75: error: unknown tag: implnote
 * @implnote
   ^
1 error

There are other issues as well. Here is the comment:

 * <p>If a SecurityManager is installed, the AWTPermission
 * {@code accessSystemTray} must be granted in order to create
 * a {@code TrayIcon}. Otherwise the constructor will throw a
 * SecurityException.
 *
 * <p>
 * @implnote
 * When the {@systemProperty apple.awt.enableTemplateImages} property is
 * set, all images associated with instances of this class are treated
 * as template images by the native desktop system. This means all color
 * information is discarded, and the image is adapted automatically to
 * be visible when desktop theme and/or colors change. This property
 * only affects MacOSX.
 *
 * <p> See the {@link SystemTray} class overview for an example on how
 * to use the {@code TrayIcon} API.
 *
 * @since 1.6
 * @see SystemTray#add
 * @see java.awt.event.ComponentEvent#getComponent
 * @see java.util.EventObject#getSource
 *
 * @author Bino George
 * @author Denis Mikhalkin
 * @author Sharon Zakhour
 * @author Anton Tarasov
 */

1. (minor) `<p>` before a block tag is redundant, and will give a warning.

2. (Probable) @implNote is a block tag. As such, it will consume all content until either the beginning of the next block tag (@since) or the end of the comment. In this case, the paragraph after the @implNote, beginning `<p> See the {@link SystemTray} class, is probably misplaced. Probably, that short paragraph should be moved up, ahead of the @implNote. The fault in the current version is more obvious when you look at the generated docs, and see that the "See the ..." paragraph is part of the impl note.