Convenience class for reading character files. The constructors of this
class assume that the default character encoding and the default byte-buffer
size are appropriate. To specify these values yourself, construct an
InputStreamReader on a FileInputStream.
FileReader
is meant for reading streams of characters.
For reading streams of raw bytes, consider using a
FileInputStream
.
Public Constructor Summary
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FileReader( String fileName)
Creates a new FileReader, given the name of the
file to read from.
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FileReader( File file)
Creates a new FileReader, given the File
to read from.
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Inherited Method Summary
From class
java.io.Reader
abstract
void
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close()
Closes the stream and releases any system resources associated with
it.
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void
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mark(int readAheadLimit)
Marks the present position in the stream.
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boolean
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markSupported()
Tells whether this stream supports the mark() operation.
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int
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read()
Reads a single character.
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abstract
int
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read(char[] cbuf, int off, int len)
Reads characters into a portion of an array.
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int
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read(char[] cbuf)
Reads characters into an array.
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int
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read( CharBuffer target)
Attempts to read characters into the specified character buffer.
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boolean
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ready()
Tells whether this stream is ready to be read.
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void
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reset()
Resets the stream.
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long
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skip(long n)
Skips characters.
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From class
java.lang.Object
Object
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clone()
Creates and returns a copy of this Object .
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boolean
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equals( Object obj)
Compares this instance with the specified object and indicates if they
are equal.
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void
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finalize()
Invoked when the garbage collector has detected that this instance is no longer reachable.
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final
Class<?>
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getClass()
Returns the unique instance of Class that represents this
object's class.
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int
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hashCode()
Returns an integer hash code for this object.
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final
void
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notify()
Causes a thread which is waiting on this object's monitor (by means of
calling one of the wait() methods) to be woken up.
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final
void
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notifyAll()
Causes all threads which are waiting on this object's monitor (by means
of calling one of the wait() methods) to be woken up.
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String
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toString()
Returns a string containing a concise, human-readable description of this
object.
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final
void
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wait(long timeout, int nanos)
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the
specified timeout expires.
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final
void
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wait(long timeout)
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the
specified timeout expires.
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final
void
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wait()
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.
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From interface
java.io.Closeable
abstract
void
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close()
Closes this stream and releases any system resources associated
with it.
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Public Constructors
public
FileReader
(String fileName)
Creates a new FileReader, given the name of the
file to read from.
Parameters
fileName |
the name of the file to read from |
Throws
FileNotFoundException |
if the named file does not exist,
is a directory rather than a regular file,
or for some other reason cannot be opened for
reading.
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public
FileReader
(File file)
Creates a new FileReader, given the File
to read from.
Parameters
file |
the File to read from |
Throws
FileNotFoundException |
if the file does not exist,
is a directory rather than a regular file,
or for some other reason cannot be opened for
reading.
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Creates a new FileReader, given the
FileDescriptor to read from.
Parameters
fd |
the FileDescriptor to read from
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