compact1, compact2, compact3
java.util.zip
Class Adler32
- java.lang.Object
-
- java.util.zip.Adler32
-
- 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.- See Also:
-
Checksum
-
-
Constructor Summary
Constructors Constructor and Description Adler32()Creates a new Adler32 object.
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method and Description longgetValue()Returns the checksum value.voidreset()Resets the checksum to initial value.voidupdate(byte[] b)Updates the checksum with the specified array of bytes.voidupdate(byte[] b, int off, int len)Updates the checksum with the specified array of bytes.voidupdate(ByteBuffer buffer)Updates the checksum with the bytes from the specified buffer.voidupdate(int b)Updates the checksum with the specified byte (the low eight bits of the argument b).
-
-
-
Method Detail
update
public void update(int b)
Updates the checksum with the specified byte (the low eight bits of the argument b).
update
public void update(byte[] b, int off, int len)Updates the checksum with the specified array of bytes.- Specified by:
-
updatein interfaceChecksum - 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- ifoffis negative, orlenis negative, oroff+lenis greater than the length of the arrayb
update
public void update(byte[] b)
Updates the checksum with the specified array of bytes.- Parameters:
-
b- the byte array to update the checksum with
update
public void update(ByteBuffer buffer)
Updates the checksum with the bytes from the specified buffer. The checksum is updated using buffer.remaining()bytes starting at buffer.position()Upon return, the buffer's position will be updated to its limit; its limit will not have been changed.- Parameters:
-
buffer- the ByteBuffer to update the checksum with - Since:
- 1.8
reset
public void reset()
Resets the checksum to initial value.
-
Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2022, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.
