Class CRC32
java.lang.Object
java.util.zip.CRC32
- All Implemented Interfaces:
- Checksum
A class that can be used to compute the CRC-32 of a data stream.
 
 Passing a null argument to a method in this class will cause
 a NullPointerException to be thrown.
- Since:
- 1.1
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Constructor SummaryConstructors
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Method SummaryModifier and TypeMethodDescriptionlonggetValue()Returns CRC-32 value.voidreset()Resets CRC-32 to initial value.voidupdate(byte[] b, int off, int len) Updates the CRC-32 checksum with the specified array of bytes.voidupdate(int b) Updates the CRC-32 checksum with the specified byte (the low eight bits of the argument b).voidupdate(ByteBuffer buffer) Updates the CRC-32 checksum with the bytes from the specified buffer.
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Constructor Details- 
CRC32public CRC32()Creates a new CRC32 object.
 
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Method Details- 
update
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updatepublic void update(byte[] b, int off, int len) Updates the CRC-32 checksum with the specified array of bytes.- Specified by:
- updatein interface- Checksum
- 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
- Throws:
- ArrayIndexOutOfBoundsException- if- offis negative, or- lenis negative, or- off+lenis negative or greater than the length of the array- b.
 
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updateUpdates the CRC-32 checksum with the bytes from the specified buffer. The checksum is updated with the remaining bytes in the buffer, starting at the buffer's position. Upon return, the buffer's position will be updated to its limit; its limit will not have been changed.
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reset
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getValue
 
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