SystemSleepEvent (Java SE 12 & JDK 12 )
Keywords: java.awt.desktop.SystemSleepEvent class

Module java.desktop
Package java.awt.desktop

## Class SystemSleepEvent

- java.lang.Object
- - java.util.EventObject
  - - java.awt.desktop.AppEvent
    - - java.awt.desktop.SystemSleepEvent

- All Implemented Interfaces:
    `Serializable`

      public final class SystemSleepEvent
      extends AppEvent

  Event sent when the system enters and exits power save sleep.
  Since:
    9
  See Also:
    `SystemSleepListener.systemAboutToSleep(SystemSleepEvent)`, `SystemSleepListener.systemAwoke(SystemSleepEvent)`, Serialized Form

- - ### Field Summary

    - ### Fields declared in class java.util.EventObject

      `source`

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `SystemSleepEvent()` | Constructs a `SystemSleepEvent`.

  - ### Method Summary

    - ### Methods declared in class java.util.EventObject

      `getSource, toString`

    - ### Methods declared in class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### Constructor Detail

    - #### SystemSleepEvent

          public SystemSleepEvent()

      Constructs a `SystemSleepEvent`.
      Throws:
        `HeadlessException` - if `GraphicsEnvironment.isHeadless()` returns `true`
        `UnsupportedOperationException` - if Desktop API is not supported on the current platform
      See Also:
        `Desktop.isDesktopSupported()`, `GraphicsEnvironment.isHeadless()`