java.io
Class FilterInputStream

java.lang.Object
  |
  +--java.io.InputStream
        |
        +--java.io.FilterInputStream

Direct Known Subclasses:

BufferedInputStream, DataInputStream

public class FilterInputStream

extends InputStream

A FilterInputStream contains another input stream, which it uses as its basic data source, possibly transforming the data before it is passed to the application.

Constructor Summary

FilterInputStream(InputStream is)
Creates a new instance of FilterInputStream.

Method Summary

int	available() Returns the number of bytes that can be read without blocking.
void	close() Closes the underlying input stream and releases all system resources associated with it.
int	read() Reads a single byte from the underlying input stream.
int	read(byte[] b) Reads up to b.length bytes from the underlying stream into b.

Methods inherited from class java.io.InputStream

read, skip

Methods inherited from class java.lang.Object

equals, getClass, hashCode, toString

Constructor Detail

FilterInputStream

public FilterInputStream(InputStream is)

Creates a new instance of FilterInputStream. The passed input stream is stored and used for input.

Parameters:

is - Input stream to read data from.

Method Detail

available

public int available()
              throws IOException

Returns the number of bytes that can be read without blocking.

Overrides:

available in class InputStream

Returns:

Number of bytes that can be read without blocking.

IOException

close

public void close()
           throws IOException

Closes the underlying input stream and releases all system resources associated with it.

Overrides:

close in class InputStream

IOException

read

public int read()
         throws IOException

Reads a single byte from the underlying input stream.

Specified by:

read in class InputStream

Returns:

The next byte of data; -1 if the end of the stream is reached.

Throws:

IOException - if an I/O error occurs.

read

public int read(byte[] b)
         throws IOException

Reads up to b.length bytes from the underlying stream into b.

Overrides:

read in class InputStream

Parameters:

b - Array to be filled with data read.

Returns:

The number of bytes read; -1 if there are no more bytes to read.

Throws:

IOException - if an I/O error occurs.