Channel

All Implemented Interfaces:

java.io.Closeable , java.lang.AutoCloseable
```
public interface Channel
 implements Closeable
                    
```
A channel is a conduit to I/O services covering such items as files, sockets, hardware devices, I/O ports or some software component.
Channels are open upon creation, and can be closed explicitly. Once a channel is closed it cannot be re-opened, and any attempts to perform I/O operations on the closed channel result in a ClosedChannelException.
Particular implementations or sub-interfaces of {@code Channel} dictate whether they are thread-safe or not.

Method Summary

Modifier and Type	Method	Description
`abstract boolean`	`isOpen()`	Returns true if this channel is open.
`abstract void`	`close()`	Closes an open channel.

Methods inherited from class java.io.Closeable
close
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - isOpen
```
 abstract boolean isOpen()
```
    Returns true if this channel is open.
  - close
```
 abstract void close()
```
    Closes an open channel. If the channel is already closed then this methodhas no effect. If there is a problem with closing the channel then themethod throws an IOException and the exception contains reasons for thefailure.
    If an attempt is made to perform an operation on a closed channel then a ClosedChannelException will be thrown on that attempt.
    If multiple threads attempt to simultaneously close a channel, then onlyone thread will run the closure code, and others will be blocked untilthe first returns.