java.util.zip

Class CheckedInputStream

Contents
  • All Implemented Interfaces:
    Closeable, AutoCloseable

    public class CheckedInputStream
extends FilterInputStream
    An input stream that also maintains a checksum of the data being read. The checksum can then be used to verify the integrity of the input data.
    See Also:
    Checksum

    • Constructor Detail

      • CheckedInputStream

        public CheckedInputStream(InputStream in,
                  Checksum cksum)
        Creates an input stream using the specified Checksum.
        Parameters:
        in - the input stream
        cksum - the Checksum

    • Method Detail

      • read

        public int read(byte[] buf,
       int off,
       int len)
         throws IOException
        Reads into an array of bytes. If len is not zero, the method blocks until some input is available; otherwise, no bytes are read and 0 is returned.
        Overrides:
        read in class FilterInputStream
        Parameters:
        buf - the buffer into which the data is read
        off - the start offset in the destination array b
        len - the maximum number of bytes read
        Returns:
        the actual number of bytes read, or -1 if the end of the stream is reached.
        Throws:
        NullPointerException - If buf is null.
        IndexOutOfBoundsException - If off is negative, len is negative, or len is greater than buf.length - off
        IOException - if an I/O error has occurred
        See Also:
        FilterInputStream.in

      • skip

        public long skip(long n)
          throws IOException
        Skips specified number of bytes of input.
        Overrides:
        skip in class FilterInputStream
        Parameters:
        n - the number of bytes to skip
        Returns:
        the actual number of bytes skipped
        Throws:
        IOException - if an I/O error has occurred

      • getChecksum

        public Checksum getChecksum()
        Returns the Checksum for this input stream.
        Returns:
        the Checksum value

Document created the 11/06/2005, last modified the 04/03/2020
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