| Package | Description | 
|---|---|
| java.io | Provides for system input and output through data streams,
serialization and the file system. | 
| 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.spi | Service-provider classes for the  java.nio.filepackage. | 
| Modifier and Type | Method and Description | 
|---|---|
| FileChannel | RandomAccessFile. getChannel()Returns the unique  FileChannelobject associated with this file. | 
| FileChannel | FileOutputStream. getChannel()Returns the unique  FileChannelobject associated with this file output stream. | 
| FileChannel | FileInputStream. getChannel()Returns the unique  FileChannelobject associated with this file input stream. | 
| Modifier and Type | Method and Description | 
|---|---|
| FileChannel | FileLock. channel()Returns the file channel upon whose file this lock was acquired. | 
| static FileChannel | FileChannel. open(Path path,
    OpenOption... options)Opens or creates a file, returning a file channel to access the file. | 
| static FileChannel | FileChannel. open(Path path,
    Set<? extends OpenOption> options,
    FileAttribute<?>... attrs)Opens or creates a file, returning a file channel to access the file. | 
| abstract FileChannel | FileChannel. position(long newPosition)Sets this channel's file position. | 
| abstract FileChannel | FileChannel. truncate(long size)Truncates this channel's file to the given size. | 
| Constructor and Description | 
|---|
| FileLock(FileChannel channel,
        long position,
        long size,
        boolean shared)Initializes a new instance of this class. | 
| Modifier and Type | Method and Description | 
|---|---|
| FileChannel | FileSystemProvider. newFileChannel(Path path,
              Set<? extends OpenOption> options,
              FileAttribute<?>... attrs)Opens or creates a file for reading and/or writing, returning a file
 channel to access the file. | 
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