Class java.util.zip.CheckedInputStream
java.lang.Object
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+----java.io.InputStream
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+----java.io.FilterInputStream
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+----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.
- See Also:
- Checksum
Method Summary
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Checksum
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getChecksum()
Returns the Checksum for this input stream.
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int
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read()
Reads a byte.
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int
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read(byte[] buf,
int off,
int len)
Reads into an array of bytes.
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long
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skip(long n)
Skips specified number of bytes of input.
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Methods inherited from class java.lang.Object
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
CheckedInputStream
public CheckedInputStream(InputStream in,
Checksum cksum)
- Creates an input stream using the specified Checksum.
- Parameters:
in
- the input stream
cksum
- the Checksum
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
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
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
getChecksum
public Checksum getChecksum()
- Returns the Checksum for this input stream.
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