Package java.util.zip

Class Adler32

java.lang.Object
java.util.zip.Adler32
All Implemented Interfaces:
Checksum
public class Adler32
extends Object
implements Checksum
The Adler-32 class is used to compute the Adler32 checksum from a set of data. Compared to CRC32 it trades reliability for speed. Refer to RFC 1950 for the specification.

  • Constructor Summary

    Constructors
    Constructor Description
    Adler32()  

  • Method Summary

    Modifier and Type Method Description
    long getValue()
    Returns the Adler32 checksum for all input received.
    void reset()
    Reset this instance to its initial checksum.
    void update​(byte[] buf)
    Update this Adler32 checksum using the contents of buf.
    void update​(byte[] buf, int offset, int byteCount)
    Update this Adler32 checksum with the contents of buf, starting from offset and reading byteCount bytes of data.
    void update​(int i)
    Update this Adler32 checksum with the single byte provided as argument.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Adler32

      public Adler32()

  • Method Details

    • getValue

      public long getValue()
      Returns the Adler32 checksum for all input received.
      Specified by:
      getValue in interface Checksum
      Returns:
      The checksum for this instance.

    • reset

      public void reset()
      Reset this instance to its initial checksum.
      Specified by:
      reset in interface Checksum

    • update

      public void update​(int i)
      Update this Adler32 checksum with the single byte provided as argument.
      Specified by:
      update in interface Checksum
      Parameters:
      i - the byte to update checksum with.

    • update

      public void update​(byte[] buf)
      Update this Adler32 checksum using the contents of buf.
      Parameters:
      buf - bytes to update checksum with.

    • update

      public void update​(byte[] buf, int offset, int byteCount)
      Update this Adler32 checksum with the contents of buf, starting from offset and reading byteCount bytes of data.
      Specified by:
      update in interface Checksum
      Parameters:
      buf - the byte array from which to read the bytes.
      offset - the initial position in buf to read the bytes from.
      byteCount - the number of bytes to read from buf.