CRC32 (Java Platform SE 6) (original) (raw)
java.util.zip
Class CRC32
java.lang.Object
java.util.zip.CRC32
All Implemented Interfaces:
public class CRC32
extends Object
implements Checksum
A class that can be used to compute the CRC-32 of a data stream.
See Also:
| Constructor Summary |
|---|
| CRC32() Creates a new CRC32 object. |
| Method Summary | |
|---|---|
| long | getValue() Returns CRC-32 value. |
| void | reset() Resets CRC-32 to initial value. |
| void | update(byte[] b) Updates checksum with specified array of bytes. |
| void | [update](../../../java/util/zip/CRC32.html#update%28byte[], int, int%29)(byte[] b, int off, int len) Updates CRC-32 with specified array of bytes. |
| void | update(int b) Updates CRC-32 with specified byte. |
| Methods inherited from class java.lang.Object |
|---|
| clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, [wait](../../../java/lang/Object.html#wait%28long, int%29) |
| Constructor Detail |
|---|
CRC32
public CRC32()
Creates a new CRC32 object.
| Method Detail |
|---|
update
public void update(int b)
Updates CRC-32 with specified byte.
Specified by:
[update](../../../java/util/zip/Checksum.html#update%28int%29) in interface [Checksum](../../../java/util/zip/Checksum.html "interface in java.util.zip")
Parameters:
b - the byte to update the checksum with
update
public void update(byte[] b, int off, int len)
Updates CRC-32 with specified array of bytes.
Specified by:
[update](../../../java/util/zip/Checksum.html#update%28byte[], int, int%29) in interface [Checksum](../../../java/util/zip/Checksum.html "interface in java.util.zip")
Parameters:
b - the byte array to update the checksum with
off - the start offset of the data
len - the number of bytes to use for the update
update
public void update(byte[] b)
Updates checksum with specified array of bytes.
Parameters:
b - the array of bytes to update the checksum with
reset
public void reset()
Resets CRC-32 to initial value.
Specified by:
[reset](../../../java/util/zip/Checksum.html#reset%28%29) in interface [Checksum](../../../java/util/zip/Checksum.html "interface in java.util.zip")
getValue
public long getValue()
Returns CRC-32 value.
Specified by:
[getValue](../../../java/util/zip/Checksum.html#getValue%28%29) in interface [Checksum](../../../java/util/zip/Checksum.html "interface in java.util.zip")
Returns:
the current checksum value
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