java.io.zip.Deflater.df.getAdler() always return -1 ...

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 I read up on sun's bugdatabase that it used to be a bug a long time ago
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 http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4192299
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 did the bug rear its head again into later versions?
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 Here is the relevant code section
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 public Integer getAdler32(File IZFl){
  Integer IAdler32 = null;
  BufferedInputStream BIS = null;
// __
  try{
   String aIZFl = IZFl.getCanonicalPath();
   if(IZFl.exists()){
    int iRdByts, iBfrSz = 64*512;
    byte[] bAr = new byte[iBfrSz];
// __
    BIS = new BufferedInputStream(new FileInputStream(IZFl), iBfrSz);
    Deflater Kmprsr = new Deflater(Deflater.BEST_SPEED);
    while((iRdByts = BIS.read(bAr)) != -1){ Kmprsr.setInput(bAr, 0, iRdByts); }
    Kmprsr.finish();
    int iAdler32 = Kmprsr.getAdler();
    IAdler32 = new Integer(iAdler32);
    BIS.close();
   }// (IZFl.exists())
   else{ throw new FileNotFoundException("// __ File not found! |" + aIZFl + "|"); }
  }catch(FileNotFoundException FNFX){ FNFX.printStackTrace(System.err); }
    catch(IOException IOX){ IOX.printStackTrace(System.err); }
// __
  finally {
   if(BIS != null){ try{ BIS.close(); }catch(IOException IOX){ ; } }
  }
// __
  return(IAdler32);
 }
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