RandomAccessFile Interface
RandomAccessFile provides random access to the data in a
file. RandomAccessFile objects are obtained by calling the
open method on a File object.
Methods
Code Future<RandomAccessFile> close() #
Close the file. Returns a Future<RandomAccessFile> that
completes with this RandomAccessFile when it has been closed.
Future<RandomAccessFile> close();
Code void closeSync() #
Synchronously close the file.
void closeSync();
Code Future<RandomAccessFile> flush() #
Flush the contents of the file to disk. Returns a
Future<RandomAccessFile> that completes with this
RandomAccessFile when the flush operation completes.
Future<RandomAccessFile> flush();
Code void flushSync() #
Synchronously flush the contents of the file to disk.
void flushSync();
Code Future<int> length() #
Get the length of the file. Returns a Future<int> that
completes with the length in bytes.
Future<int> length();
Code Future<int> position() #
Get the current byte position in the file. Returns a
Future<int> that completes with the position.
Future<int> position();
Code int positionSync() #
Synchronously get the current byte position in the file.
int positionSync();
Code Future<int> readByte() #
Read a byte from the file. Returns a Future<int> that
completes with the byte or -1 if end of file has been reached.
Future<int> readByte();
Code int readByteSync() #
Synchronously read a single byte from the file. If end of file has been reached -1 is returned.
int readByteSync();
Code Future<int> readList(List<int> buffer, int offset, int bytes) #
Read a List<int> from the file. Returns a Future<int> that
completes with an indication of how much was read.
Future<int> readList(List<int> buffer, int offset, int bytes);
Code int readListSync(List<int> buffer, int offset, int bytes) #
Synchronously read a List<int> from the file. Returns the number of bytes read.
int readListSync(List<int> buffer, int offset, int bytes);
Code Future<RandomAccessFile> setPosition(int position) #
Set the byte position in the file. Returns a
Future<RandomAccessFile> that completes with this
RandomAccessFile when the position has been set.
Future<RandomAccessFile> setPosition(int position);
Code void setPositionSync(int position) #
Synchronously set the byte position in the file.
void setPositionSync(int position);
Code Future<RandomAccessFile> truncate(int length) #
Truncate (or extend) the file to
length bytes. Returns a
Future<RandomAccessFile> that completes with this
RandomAccessFile when the truncation has been performed.
Future<RandomAccessFile> truncate(int length);
Code void truncateSync(int length) #
Synchronously truncate (or extend) the file to length bytes.
void truncateSync(int length);
Code Future<RandomAccessFile> writeByte(int value) #
Write a single byte to the file. Returns a
Future<RandomAccessFile> that completes with this
RandomAccessFile when the write completes.
Future<RandomAccessFile> writeByte(int value);
Code int writeByteSync(int value) #
Synchronously write a single byte to the file. Returns the number of bytes successfully written.
int writeByteSync(int value);
Code Future<RandomAccessFile> writeList(List<int> buffer, int offset, int bytes) #
Write a List<int> to the file. Returns a
Future<RandomAccessFile> that completes with this
RandomAccessFile when the write completes.
Future<RandomAccessFile> writeList(List<int> buffer, int offset, int bytes);
Code int writeListSync(List<int> buffer, int offset, int bytes) #
Synchronously write a List<int> to the file. Returns the number of bytes successfully written.
int writeListSync(List<int> buffer, int offset, int bytes);
Code Future<RandomAccessFile> writeString(String string, [Encoding encoding]) #
Write a string to the file using the given
encoding. The
default encoding is UTF-8 - Encoding.UTF_8. Returns a
Future<RandomAccessFile> that completes with this
RandomAccessFile when the write completes.
Future<RandomAccessFile> writeString(String string, [Encoding encoding]);