How to use

mark

method

in

java.io.FilterReader

@Override
public void mark(int readAheadLimit) throws IOException {
  super.mark(readAheadLimit);
  mark = record == null ? -1 : record.length();
}

@Override
public synchronized void mark(int readlimit) {
  try {
    super.mark(readlimit);
  } catch (IOException e) {
    throw new RuntimeException(e);
  }
}

/**
 * {@inheritDoc}
 * 
 * @throws IOException
 */
@Override
public synchronized void mark(final int readlimit) throws IOException {
  checkCloseInvoked("mark");
  super.mark(readlimit);
}