Module java.base
Package java.nio.channels.spi

Class AbstractSelectionKey

java.lang.Object
java.nio.channels.SelectionKey
java.nio.channels.spi.AbstractSelectionKey
public abstract class AbstractSelectionKey extends SelectionKey
Base implementation class for selection keys.

This class tracks the validity of the key and implements cancellation.

Since:
1.4

  • Constructor Details

    • AbstractSelectionKey

      protected AbstractSelectionKey()
      Initializes a new instance of this class.

  • Method Details

    • isValid

      public final boolean isValid()
      Description copied from class: SelectionKey
      Tells whether or not this key is valid.

      A key is valid upon creation and remains so until it is cancelled, its channel is closed, or its selector is closed.

      Specified by:
      isValid in class SelectionKey
      Returns:
      true if, and only if, this key is valid

    • cancel

      public final void cancel()
      Cancels this key.

      If this key has not yet been cancelled then it is added to its selector's cancelled-key set while synchronized on that set.

      Specified by:
      cancel in class SelectionKey