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java.util.zip

Class CRC32

Contents
  • All Implemented Interfaces:
    Checksum

    public class CRC32
extends Object
implements Checksum
    A class that can be used to compute the CRC-32 of a data stream.
    See Also:
    Checksum

    • Constructor Detail

      • CRC32

        public CRC32()
        Creates a new CRC32 object.

    • Method Detail

      • update

        public void update(int b)
        Updates the CRC-32 checksum with the specified byte (the low eight bits of the argument b).
        Specified by:
        update in interface Checksum
        Parameters:
        b - the byte to update the checksum with

      • update

        public void update(byte[] b,
          int off,
          int len)
        Updates the CRC-32 checksum with the specified array of bytes.
        Specified by:
        update in 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

      • update

        public void update(byte[] b)
        Updates the CRC-32 checksum with the 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 in interface Checksum

      • getValue

        public long getValue()
        Returns CRC-32 value.
        Specified by:
        getValue in interface Checksum
        Returns:
        the current checksum value
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