- java.lang.Object
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- java.io.InputStream
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- java.io.FilterInputStream
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- java.util.zip.CheckedInputStream
 
 
 
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- 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.- Since:
- 1.1
- See Also:
- Checksum
 
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Field Summary- 
Fields declared in class java.io.FilterInputStreamin
 
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Constructor SummaryConstructors Constructor Description CheckedInputStream(InputStream in, Checksum cksum)Creates an input stream using the specified Checksum.
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Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description ChecksumgetChecksum()Returns the Checksum for this input stream.intread()Reads a byte.intread(byte[] buf, int off, int len)Reads into an array of bytes.longskip(long n)Skips specified number of bytes of input.- 
Methods declared in class java.io.FilterInputStreamavailable, close, mark, markSupported, read, reset
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Methods declared in class java.io.InputStreamnullInputStream, readAllBytes, readNBytes, readNBytes, transferTo
 
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Constructor Detail- 
CheckedInputStreampublic CheckedInputStream(InputStream in, Checksum cksum) Creates an input stream using the specified Checksum.- Parameters:
- in- the input stream
- cksum- the Checksum
 
 
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Method Detail- 
readpublic int read() throws IOExceptionReads a byte. Will block if no input is available.- Overrides:
- readin class- FilterInputStream
- Returns:
- the byte read, or -1 if the end of the stream is reached.
- Throws:
- IOException- if an I/O error has occurred
- See Also:
- FilterInputStream.in
 
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readpublic int read(byte[] buf, int off, int len) throws IOExceptionReads into an array of bytes. Iflenis not zero, the method blocks until some input is available; otherwise, no bytes are read and0is returned.- Overrides:
- readin 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- bufis- null.
- IndexOutOfBoundsException- If- offis negative,- lenis negative, or- lenis greater than- buf.length - off
- IOException- if an I/O error has occurred
- See Also:
- FilterInputStream.in
 
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skippublic long skip(long n) throws IOExceptionSkips specified number of bytes of input.- Overrides:
- skipin 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
 
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getChecksumpublic Checksum getChecksum() Returns the Checksum for this input stream.- Returns:
- the Checksum value
 
 
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