# Class ScreenSleepEvent

java.lang.Object
java.util.EventObject
java.awt.desktop.AppEvent
java.awt.desktop.ScreenSleepEvent

All Implemented Interfaces:
  `Serializable`

public final class ScreenSleepEvent extends AppEvent
Event sent when the displays attached to the system enter and exit power save sleep.

Since:
  9
See Also:
  - `ScreenSleepListener.screenAboutToSleep(ScreenSleepEvent)`
  - `ScreenSleepListener.screenAwoke(ScreenSleepEvent)`
  - Serialized Form

- ## Field Summary

  ### Fields declared in class EventObject

  `source`
  Modifier and Type
  Field
  Description
  `protected Object`
  `source`
  The object on which the Event initially occurred.

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `ScreenSleepEvent()`
  Constructs a `ScreenSleepEvent`.

- ## Method Summary

  ### Methods declared in class EventObject

  `getSource, toString`
  Modifier and Type
  Method
  Description
  `Object`
  `getSource()`
  The object on which the Event initially occurred.
  `String`
  `toString()`
  Returns a String representation of this EventObject.

  ### Methods declared in class Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`
  Modifier and Type
  Method
  Description
  `protected Object`
  `clone()`
  Creates and returns a copy of this object.
  `boolean`
  `equals(Object obj)`
  Indicates whether some other object is "equal to" this one.
  `protected void`
  `finalize()`
  Deprecated, for removal: This API element is subject to removal in a future version.
  Finalization is deprecated and subject to removal in a future release.
  `final Class<?>`
  `getClass()`
  Returns the runtime class of this `Object`.
  `int`
  `hashCode()`
  Returns a hash code value for this object.
  `final void`
  `notify()`
  Wakes up a single thread that is waiting on this object's monitor.
  `final void`
  `notifyAll()`
  Wakes up all threads that are waiting on this object's monitor.
  `final void`
  `wait()`
  Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
  `final void`
  `wait(long timeoutMillis)`
  Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
  `final void`
  `wait(long timeoutMillis, int nanos)`
  Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

- ## Constructor Details

  - ### ScreenSleepEvent

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