Class Overview
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.
Summary
| Public Constructors |
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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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FileReader(FileDescriptor fd)
Creates a new FileReader, given the
FileDescriptor to read from.
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[Expand]
Inherited Methods |
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From class
java.io.InputStreamReader
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From class
java.io.Reader
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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(CharBuffer target)
Attempts to read characters into the specified character buffer.
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int
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read(char[] cbuf)
Reads characters into an array.
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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
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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)
Indicates whether some other object is "equal to" this one.
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void
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finalize()
Called by the garbage collector on an object when garbage collection
determines that there are no more references to the object.
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final
Class<?>
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getClass()
Returns the runtime class of this Object.
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int
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hashCode()
Returns a hash code value for the object.
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final
void
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notify()
Wakes up a single thread that is waiting on this object's
monitor.
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final
void
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notifyAll()
Wakes up all threads that are waiting on this object's monitor.
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String
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toString()
Returns a string representation of the object.
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final
void
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wait()
Causes the current thread to wait until another thread invokes the
notify() method or the
notifyAll() method for this object. |
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final
void
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wait(long timeout, int nanos)
Causes the current thread to wait until another thread invokes the
notify() method or the
notifyAll() method for this object, or
some other thread interrupts the current thread, or a certain
amount of real time has elapsed. |
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final
void
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wait(long timeout)
Causes the current thread to wait until either another thread invokes the
notify() method or the
notifyAll() method for this object, or a
specified amount of time has elapsed. |
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From interface
java.io.Closeable
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abstract
void
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close()
Closes this stream and releases any system resources associated
with it.
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From interface
java.lang.Readable
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abstract
int
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read(CharBuffer cb)
Attempts to read characters into the specified character buffer.
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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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public
FileReader
(FileDescriptor fd)
Creates a new FileReader, given the
FileDescriptor to read from.
Parameters
| fd
| the FileDescriptor to read from
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