How to use

fillBuf

method

in

java.io.BufferedReader

private int readChar() throws IOException {
  if (pos < end || fillBuf() != -1) {
    return buf[pos++];
  }
  return -1;
}

/**
 * Peeks at the next input character, refilling the buffer if necessary. If
 * this character is a newline character ("\n"), it is discarded.
 */
final void chompNewline() throws IOException {
  if ((pos != end || fillBuf() != -1) && buf[pos] == '\n') {
    ++pos;
  }
}

pos = end;
while (read < charCount) {
  if (fillBuf() == -1) {
    return read;

while (true) {
  pos = end;
  if (fillBuf() == -1) {

if (fillBuf() == -1) {
  break; // source is exhausted

private int readChar() throws IOException {
  if (pos < end || fillBuf() != -1) {
    return buf[pos++];
  }
  return -1;
}

private int readChar() throws IOException {
  if (pos < end || fillBuf() != -1) {
    return buf[pos++];
  }
  return -1;
}

/**
 * Peeks at the next input character, refilling the buffer if necessary. If
 * this character is a newline character ("\n"), it is discarded.
 */
final void chompNewline() throws IOException {
  if ((pos != end || fillBuf() != -1) && buf[pos] == '\n') {
    ++pos;
  }
}

private int readChar() throws IOException {
  if (pos < end || fillBuf() != -1) {
    return buf[pos++];
  }
  return -1;
}

/**
 * Peeks at the next input character, refilling the buffer if necessary. If
 * this character is a newline character ("\n"), it is discarded.
 */
final void chompNewline() throws IOException {
  if ((pos != end || fillBuf() != -1) && buf[pos] == '\n') {
    ++pos;
  }
}

/**
 * Peeks at the next input character, refilling the buffer if necessary. If
 * this character is a newline character ("\n"), it is discarded.
 */
final void chompNewline() throws IOException {
  if ((pos != end || fillBuf() != -1) && buf[pos] == '\n') {
    ++pos;
  }
}

private int readChar() throws IOException {
  if (pos < end || fillBuf() != -1) {
    return buf[pos++];
  }
  return -1;
}

/**
 * Peeks at the next input character, refilling the buffer if necessary. If
 * this character is a newline character ("\n"), it is discarded.
 */
final void chompNewline() throws IOException {
  if ((pos != end || fillBuf() != -1) && buf[pos] == '\n') {
    ++pos;
  }
}

/**
 * Peeks at the next input character, refilling the buffer if necessary. If
 * this character is a newline character ("\n"), it is discarded.
 */
final void chompNewline() throws IOException {
  if ((pos != end || fillBuf() != -1) && buf[pos] == '\n') {
    ++pos;
  }
}

private int readChar() throws IOException {
  if (pos < end || fillBuf() != -1) {
    return buf[pos++];
  }
  return -1;
}

private int readChar() throws IOException {
  if (pos < end || fillBuf() != -1) {
    return buf[pos++];
  }
  return -1;
}

/**
 * Peeks at the next input character, refilling the buffer if necessary. If
 * this character is a newline character ("\n"), it is discarded.
 */
final void chompNewline() throws IOException {
  if ((pos != end || fillBuf() != -1) && buf[pos] == '\n') {
    ++pos;
  }
}

private int readChar() throws IOException {
  if (pos < end || fillBuf() != -1) {
    return buf[pos++];
  }
  return -1;
}

/**
 * Peeks at the next input character, refilling the buffer if necessary. If
 * this character is a newline character ("\n"), it is discarded.
 */
final void chompNewline() throws IOException {
  if ((pos != end || fillBuf() != -1) && buf[pos] == '\n') {
    ++pos;
  }
}

pos = end;
while (read < charCount) {
  if (fillBuf() == -1) {
    return read;