BufferedReader class

Reads text from a character-input stream, buffering characters so as to provide for the efficient reading of characters, arrays, and lines.

The buffer size may be specified, or the default size may be used. The default is large enough for most purposes.

Example Usage

// Basic buffered reading
final buffered = BufferedReader(FileReader('document.txt'));
try {
  String? line;
  while ((line = await buffered.readLine()) != null) {
    print('Line: $line');
  }
} finally {
  await buffered.close();
}

// Using mark and reset for lookahead
final buffered = BufferedReader(FileReader('config.txt'));
try {
  buffered.mark(1024);
  
  final firstLine = await buffered.readLine();
  if (firstLine?.startsWith('<?xml') == true) {
    await buffered.reset(); // Go back to beginning
    processAsXml(buffered);
  } else {
    await buffered.reset(); // Go back to beginning
    processAsText(buffered);
  }
} finally {
  await buffered.close();
}