Class java.io.PushbackInputStream 
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Class java.io.PushbackInputStream 

java.lang.Object
|
   +----java.io.InputStream
|
           +----java.io.FilterInputStream
|
                   +----java.io.PushbackInputStream
public class PushbackInputStream
extends FilterInputStream
An input stream that has a 1 byte push back buffer.

Variable Index

o pushBack
Push back character.

Constructor Index

o PushbackInputStream(InputStream)
Creates a PushbackInputStream.

Method Index

o available()
Returns the number of bytes that can be read.
o markSupported()
Returns true if this stream type supports mark/reset.
o read()
Reads a byte of data.
o read(byte[], int, int)
Reads into an array of bytes.
o unread(int)
Pushes back a character.

Variables

o pushBack 
protected int pushBack
Push back character.

Constructors

o PushbackInputStream 
public PushbackInputStream(InputStream in)
Creates a PushbackInputStream.
Parameters:
in - the input stream

Methods

o read 
public int read() throws IOException
Reads a byte of data. This method will block if no input is available.
Returns:
the byte read, or -1 if the end of the stream is reached.
Throws: IOException
If an I/O error has occurred.
Overrides:
read in class FilterInputStream
o read 
public int read(byte bytes[],
                  int offset,
                  int length) throws IOException
Reads into an array of bytes. This method blocks until some input is available.
Parameters:
b - the buffer into which the data is read
off - the start offset of the data
len - the maximum number of bytes read
Returns:
the actual number of bytes read, -1 is returned when the end of the stream is reached.
Throws: IOException
If an I/O error has occurred.
Overrides:
read in class FilterInputStream
o unread 
public void unread(int ch) throws IOException
Pushes back a character.
Parameters:
ch - the character to push back.
Throws: IOException
If an attempt to push back more than one character is made.
o available 
public int available() throws IOException
Returns the number of bytes that can be read. without blocking.
Overrides:
available in class FilterInputStream
o markSupported 
public boolean markSupported()
Returns true if this stream type supports mark/reset.
Overrides:
markSupported in class FilterInputStream 
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