# 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