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class SafeBufferedReader extends BufferedReader {
   SafeBufferedReader(Reader in) {
      super(in);
   }

   public int readSafe(char[] cbuf, int off, int len) throws EOFException {
      int read = read(cbuf, off, len);
      if (read == -1) {
         throw new EOFException();
      } else {
         return read;
      }
   }
}

// ...

SafeBufferedReader safeBuffRdr;

try {
   read = safeBuffRdr.readSafe(chBuff, 0, MAX_READ);
   chBuff[read] = TERMINATOR;
} catch (EOFException eof) {
   chBuff[0] = TERMINATOR;
}