java.util.zip
Class CRC32
- Checksum
Computes CRC32 data checksum of a data stream.
The actual CRC32 algorithm is described in RFC 1952
(GZIP file format specification version 4.3).
Can be used to get the CRC32 over a stream if used with checked input/output
streams.
long | getValue()- Returns the CRC32 data checksum computed so far.
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void | reset()- Resets the CRC32 data checksum as if no update was ever called.
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void | update(byte[] buf)- Adds the complete byte array to the data checksum.
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void | update(byte[] buf, int off, int len)- Adds the byte array to the data checksum.
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void | update(int bval)- Updates the checksum with the int bval.
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clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
reset
public void reset()
Resets the CRC32 data checksum as if no update was ever called.
- reset in interface Checksum
update
public void update(byte[] buf)
Adds the complete byte array to the data checksum.
update
public void update(byte[] buf,
int off,
int len) Adds the byte array to the data checksum.
- update in interface Checksum
buf - the buffer which contains the dataoff - the offset in the buffer where the data startslen - the length of the data
update
public void update(int bval)
Updates the checksum with the int bval.
- update in interface Checksum
bval - (the byte is taken as the lower 8 bits of bval)
CRC32.java - Computes CRC32 data checksum of a data stream
Copyright (C) 1999. 2000, 2001 Free Software Foundation, Inc.
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