| Package | Description | 
|---|---|
| java.nio.channels | Defines channels, which represent connections to entities that are capable of
 performing I/O operations, such as files and sockets; defines selectors, for
 multiplexed, non-blocking I/O operations. | 
| java.nio.file | Defines interfaces and classes for the Java virtual machine to access files,
 file attributes, and file systems. | 
| java.nio.file.spi | Service-provider classes for the  java.nio.filepackage. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | FileChannelA channel for reading, writing, mapping, and manipulating a file. | 
| Modifier and Type | Method and Description | 
|---|---|
| SeekableByteChannel | SeekableByteChannel. position(long newPosition)Sets this channel's position. | 
| SeekableByteChannel | SeekableByteChannel. truncate(long size)Truncates the entity, to which this channel is connected, to the given
 size. | 
| Modifier and Type | Method and Description | 
|---|---|
| static SeekableByteChannel | Files. newByteChannel(Path path,
              OpenOption... options)Opens or creates a file, returning a seekable byte channel to access the
 file. | 
| static SeekableByteChannel | Files. newByteChannel(Path path,
              Set<? extends OpenOption> options,
              FileAttribute<?>... attrs)Opens or creates a file, returning a seekable byte channel to access the
 file. | 
| SeekableByteChannel | SecureDirectoryStream. newByteChannel(T path,
              Set<? extends OpenOption> options,
              FileAttribute<?>... attrs)Opens or creates a file in this directory, returning a seekable byte
 channel to access the file. | 
| Modifier and Type | Method and Description | 
|---|---|
| abstract SeekableByteChannel | FileSystemProvider. newByteChannel(Path path,
              Set<? extends OpenOption> options,
              FileAttribute<?>... attrs)Opens or creates a file, returning a seekable byte channel to access the
 file. | 
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