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/OpenJDK 21

Interface SystemEventListener

All Superinterfaces:
EventListener
All Known Subinterfaces:
AppForegroundListener, AppHiddenListener, AppReopenedListener, ScreenSleepListener, SystemSleepListener, UserSessionListener 
public interface SystemEventListener extends EventListener
Common interface for all event listener sub-types. Implementors may implement multiple sub-types, but only need to call Desktop.addAppEventListener(SystemEventListener) once to receive all notifications.
Since:
9

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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/java/awt/desktop/SystemEventListener.html