public class LineCounter implements OutChannel {

  private int numLines = 0;

  public void done() throws Exception {
    System.out.println("Number of lines = " + numLines);
  }

  public void write(int data) throws Exception {
    if (data == '\n') {
      numLines++;
    }
  }

  public int getNumLines() {
    return numLines;
  }

}