android/guava/src/com/google/common/io/LineReader.java
@CanIgnoreReturnValue // to skip a line
  public String readLine() throws IOException {
    while (lines.peek() == null) {
      cbuf.clear();
      // The default implementation of Reader#read(CharBuffer) allocates a
      // temporary char[], so we call Reader#read(char[], int, int) instead.
      int read = (reader != null) ? reader.read(buf, 0, buf.length) : readable.read(cbuf);
      if (read == -1) {
        lineBuf.finish();
        break;
      }
      lineBuf.add(buf, 0, read);
    }
    return lines.poll();
  }
@CanIgnoreReturnValue // to skip a line
  public String readLine() throws IOException {
    while (lines.peek() == null) {
      cbuf.clear();
      // The default implementation of Reader#read(CharBuffer) allocates a
      // temporary char[], so we call Reader#read(char[], int, int) instead.
      int read = (reader != null) ? reader.read(buf, 0, buf.length) : readable.read(cbuf);
      if (read == -1) {
        lineBuf.finish();
        break;
      }
      lineBuf.add(buf, 0, read);
    }
    return lines.poll();
  }
@ CanIgnoreReturnValue // to skip a line public String readLine ( ) throws IOException { while ( lines . peek ( ) == null ) { cbuf . clear ( ) ; // The default implementation of Reader#read(CharBuffer) allocates a // temporary char[], so we call Reader#read(char[], int, int) instead. int read = ( reader != null ) ? reader . read ( buf , 0 , buf . length ) : readable . read ( cbuf ) ; if ( read == - 1 ) { lineBuf . finish ( ) ; break ; } lineBuf . add ( buf , 0 , read ) ; } return lines . poll ( ) ; }
Reads a line of text. A line is considered to be terminated by any one of a line feed ({@code
'\n'}), a carriage return ({@code '\r'}), or a carriage return followed immediately by a
linefeed ({@code "\r\n"}).

@return a {@code String} containing the contents of the line, not including any
line-termination characters, or {@code null} if the end of the stream has been reached.
@throws IOException if an I/O error occurs
Reads a line of text . A line is considered to be terminated by any one of a line feed ( { @code \ n } ) a carriage return ( { @code \ r } ) or a carriage return followed immediately by a linefeed ( { @code \ r \ n } ) .