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

- Field Summary
  - Fields inherited from class java.nio.channels.SelectionKey
    OP_ACCEPT, OP_CONNECT, OP_READ, OP_WRITE
- Constructor Summary
  
  Constructors
  Modifier Constructor Description
  
  protected AbstractSelectionKey()
  Initializes a new instance of this class.
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  void cancel()
  Cancels this key.
  
  boolean isValid()
  Tells whether or not this key is valid.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  - Methods inherited from class java.nio.channels.SelectionKey
    attach, attachment, channel, interestOps, interestOps, isAcceptable, isConnectable, isReadable, isWritable, readyOps, selector

- Constructor Detail
  - AbstractSelectionKey
```
protected AbstractSelectionKey()
```
    Initializes a new instance of this class.
- Method Detail
  - 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