Examples of java.io.FileInputStream.skip()

java.io.FileInputStream.skip()
Skips over and discards n bytes of data from the input stream.
The skip method may, for a variety of reasons, end up skipping over some smaller number of bytes, possibly 0. If n is negative, an IOException is thrown, even though the skip method of the {@link InputStream} superclass does nothing in this case.The actual number of bytes skipped is returned.
This method may skip more bytes than are remaining in the backing file. This produces no exception and the number of bytes skipped may include some number of bytes that were beyond the EOF of the backing file. Attempting to read from the stream after skipping past the end will result in -1 indicating the end of the file. @param n the number of bytes to be skipped. @return the actual number of bytes skipped. @exception IOException if n is negative, if the stream does notsupport seek, or if an I/O error occurs.

          catch ( NumberFormatException nfe ) {}
        }
      }


      FileInputStream fis = new FileInputStream( f );
      fis.skip( startFrom );
      Response r = new Response( HTTP_OK, mime, fis );
      r.addHeader( "Content-length", "" + (f.length() - startFrom));
      r.addHeader( "Content-range", "" + startFrom + "-" +
            (f.length()-1) + "/" + f.length());
      return r;

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/*     */   public static Pict fromFile(File paramFile)
/*     */     throws QTException, IOException
/*     */   {
/* 214 */     FileInputStream localFileInputStream = new FileInputStream(paramFile);
/* 215 */     byte[] arrayOfByte = new byte[localFileInputStream.available() - 512];
/* 216 */     localFileInputStream.skip(512L);
/* 217 */     localFileInputStream.read(arrayOfByte, 0, arrayOfByte.length);
/* 218 */     localFileInputStream.close();
/* 219 */     Pict localPict = new Pict(arrayOfByte.length, false);
/* 220 */     localPict.copyFromArray(0, arrayOfByte, 0, arrayOfByte.length);
/* 221 */     return localPict;

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                    catch ( NumberFormatException nfe ) {}
                }
            }


            FileInputStream fis = new FileInputStream( f );
            fis.skip( startFrom );
            Response r = new Response( HTTP_OK, mime, fis );
            r.addHeader( "Content-length", "" + (f.length() - startFrom));
            r.addHeader( "Content-range", "" + startFrom + "-" +
                        (f.length()-1) + "/" + f.length());
            return r;

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        computePosition();
        
        if(sdImageFile != null) {
            try {
                FileInputStream fis = new FileInputStream(sdImageFile);
                fis.skip(this.position);
                int read = fis.read(readBuffer);
                if(read < SECTOR_SIZE) {
                    logger.log(Level.WARNING, "not enough data to fill read buffer from SD image file");
                }
                fis.close();

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        FileInputStream file = null;
        try {
            file = new FileInputStream(getLogFileName());
            long bytesToSkip = fromFilePosition-1;
            if (bytesToSkip > 0) {
                long bytesSkipped = file.skip(bytesToSkip);
                if (bytesSkipped != fromFilePosition) {
                    if (LogFacade.LOGGING_LOGGER.isLoggable(Level.FINE)) { 
                        LogFacade.LOGGING_LOGGER.log(Level.FINE, "Did not skip exact bytes while positioning reader in " + getLogFileName());
                    }
                }

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     * @tests java.io.FileInputStream#skip(long)
     */
    public void test_skipNegativeArgumentJ() throws IOException {
        FileInputStream fis = new FileInputStream(fileName);
        try {
            fis.skip(-5);
            fail("IOException must be thrown if number of bytes to skip <0");
        } catch (IOException e) {
            // Expected IOException
        } finally {
            fis.close();

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            final long dataLen = newLen;
            FileInputStream fis = new FileInputStream( f ) {
              public int available() throws IOException { return (int)dataLen; }
            };
            fis.skip( startFrom );


            res = new Response( HTTP_PARTIALCONTENT, mime, fis );
            res.addHeader( "Content-Length", "" + dataLen);
            res.addHeader( "Content-Range", "bytes " + startFrom + "-" + endAt + "/" + fileLen);
            res.addHeader( "ETag", etag);

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     * @tests java.io.FileInputStream#skip(long)
     */
    public void test_skipNegativeArgumentJ() throws IOException {
        FileInputStream fis = new FileInputStream(fileName);
        try {
            fis.skip(-5);
            fail("IOException must be thrown if number of bytes to skip <0");
        } catch (IOException e) {
            // Expected IOException
        } finally {
            fis.close();

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        fis.close();
        
        fis = new FileInputStream(fileName);
        assertEquals(0, fis.getChannel().position());
        bs = new byte[10];
        fis.skip(100);
        assertEquals(100, fis.getChannel().position());
        r = fis.read(bs);
        assertEquals(110, fis.getChannel().position());
        fis.close();
    }

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        //open the map-output file
        mapOutputIn = SecureIOUtils.openForRead(
            new File(mapOutputFileName.toUri().getPath()), runAsUserName);


        //seek to the correct offset for the reduce
        mapOutputIn.skip(info.startOffset);
        long rem = info.partLength;
        int len =
          mapOutputIn.read(buffer, 0, (int)Math.min(rem, MAX_BYTES_TO_READ));
        while (rem > 0 && len >= 0) {
          rem -= len;

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