Class java.util.zip.CheckedInputStream 
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Class java.util.zip.CheckedInputStream 

Object
   |
   +----InputStream
           |
           +----FilterInputStream
                   |
                   +----java.util.zip.CheckedInputStream
public class CheckedInputStream
extends FilterInputStream
An input stream that also maintains a checksum of the data being read. The checksum can then be used to verify the integrity of the input data.

Version:
1.10, 11/23/96
Author:
David Connelly
See Also:
Checksum

Constructor Index

o java.util.zip.CheckedInputStream(InputStream, Checksum)
Creates an input stream using the specified Checksum.

Method Index

o getChecksum()
Returns the Checksum for this input stream.
o read()
Reads a byte.
o read(byte[], int, int)
Reads into an array of bytes.
o skip(long)
Skips specified number of bytes of input.

Constructors

o CheckedInputStream 
public CheckedInputStream(InputStream in,
                          Checksum cksum)
Creates an input stream using the specified Checksum.

Parameters:
in - the input stream
cksum - the Checksum

Methods

o getChecksum 
public java.util.zip.Checksum getChecksum()
Returns the Checksum for this input stream.

o read 
public int read() throws IOException
Reads a byte. 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 buf,
                int off,
                int len) throws IOException
Reads into an array of bytes. Will block until some input is available.

Parameters:
buf - 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, 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 skip 
public long skip(long n) throws IOException
Skips specified number of bytes of input.

Parameters:
n - the number of bytes to skip
Returns:
the actual number of bytes skipped
Throws: IOException
if an I/O error has occurred
Overrides:
skip in class FilterInputStream 
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