- java.lang.Object
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- java.util.zip.Adler32
 
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- All Implemented Interfaces:
- Checksum
 
 public class Adler32 extends Object implements Checksum A class that can be used to compute the Adler-32 checksum of a data stream. An Adler-32 checksum is almost as reliable as a CRC-32 but can be computed much faster.Passing a nullargument to a method in this class will cause aNullPointerExceptionto be thrown.- Since:
- 1.1
 
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Constructor SummaryConstructors Constructor Description Adler32()Creates a new Adler32 object.
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Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description longgetValue()Returns the checksum value.voidreset()Resets the checksum to initial value.voidupdate(byte[] b, int off, int len)Updates the checksum with the specified array of bytes.voidupdate(int b)Updates the checksum with the specified byte (the low eight bits of the argument b).voidupdate(ByteBuffer buffer)Updates the checksum with the bytes from the specified buffer.
 
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Method Detail- 
updatepublic void update(int b) Updates the checksum with the specified byte (the low eight bits of the argument b).
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updatepublic void update(byte[] b, int off, int len)Updates the 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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updatepublic void update(ByteBuffer buffer) Updates the 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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resetpublic void reset() Resets the checksum to initial value.
 
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