Read contents of a file line by line

Question

I want to code a form such that it reads a text file line by line!
i have found the code that includes the text file in res folder and it reads also the contents!!!
but my problem is that i want it to read one line at a time and next line afterwards at another click!!!

Answer 1

This is the main code bt the problem is i dont want it to read whole file at once..............
I want it to read one line at a time.....
thanks for the help any ways.........
public void commandAction(Command c, Displayable s){
    String label = c.getLabel();
    if (label.equals("Read")){
      String string = file();
      if (string != null){
        alert = new Alert("Reading", string, null, null);
        alert.setTimeout(Alert.FOREVER);
        display.setCurrent(alert, form);
    } else if (label.equals("Exit")){
      destroyApp(false);
  private String file(){
    InputStream is = getClass().getResourceAsStream("help.txt");
    StringBuffer sb = new StringBuffer();
    try{
      int chars, i = 0;
      while ((chars = is.read()) != -1){
        sb.append((char) chars);
      return sb.toString();
    }catch (Exception e){}
    return null;
  }