java.io
Class FileInputStream

java.lang.Object
  java.io.InputStream
      java.io.FileInputStream

public class FileInputStream
extends InputStream

Reads a stream of bytes from a file.

Author:

Brian Bagnall

Constructor Summary

FileInputStream(File f)

Method Summary

int	available() Returns the number of bytes that can be read (or skipped over) from this input stream without blocking by the next caller of a method for this input stream.
int	read() Reads the next byte of data from the input stream.
void	reset() resets pointers so next read() is from the start of the file;

Methods inherited from class java.io.InputStream

close, mark, markSupported, read, read, skip

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FileInputStream

public FileInputStream(File f)
                throws FileNotFoundException

Throws:

FileNotFoundException

Method Detail

available

public int available()
              throws IOException

Description copied from class: InputStream

Returns the number of bytes that can be read (or skipped over) from this input stream without blocking by the next caller of a method for this input stream. The next caller might be the same thread or or another thread.

The available method for class InputStream always returns 0.

This method should be overridden by subclasses.

Overrides:

available in class InputStream

Returns:

the number of bytes that can be read from this input stream without blocking.

Throws:

IOException - if an I/O error occurs.

read

public int read()
         throws IOException

Description copied from class: InputStream

Reads the next byte of data from the input stream. The value byte is returned as an int in the range 0 to 255. If no byte is available because the end of the stream has been reached, the value -1 is returned. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.

A subclass must provide an implementation of this method.

Specified by:

read in class InputStream

Returns:

the next byte of data, or -1 if the end of the stream is reached.

Throws:

IOException - if an I/O error occurs.

reset

public void reset()

resets pointers so next read() is from the start of the file;

Overrides:

reset in class InputStream

See Also:

InputStream.mark(int), IOException