为什么这个方法调用不起作用？

Question

I'm creating a method to take an input by a user and validate it to make sure it's correct. If it's correct it will call a method and input the user input in to it. But for some reason, the method call is not working. It doesn't produce any errors, it just simply doesn't do it. I placed a print statement at the end of the code to make sure it actually reaches there and it does, but for some reason it's just not calling the method like it's supposed to. The other method works fine if I call it by itself and input a string via the parameters.

The code is:

public void getGetScheduledShowByFilmInput()////new - omar////
{
    BufferedReader reader;
    reader = new BufferedReader(new InputStreamReader(System.in));

    String filmInput;
    filmInput = "";

    boolean foundFilm;
    foundFilm = false;

    System.out.println("Here is a list of films that are currently showing:");
    for(Film film : films){
        System.out.println(film.getFilmName());
    }

    System.out.println("");
    System.out.println("Please type the film name that you wish to view the corresponding shows for and press enter.");
    System.out.println("Type 'exit' and press enter to exit this process.");

    while(foundFilm == false){
        try{
            filmInput = reader.readLine();
        }
        catch (IOException e){
            System.out.println("Error");
        }

        //If user enters "exit" then return.
        if(filmInput.equals("exit")){
            return;
        }

        //Check to see if the film name input by the user corresponds to any film showing.
        for(Film film : films){
            if(film.getFilmName() == filmInput){
                foundFilm = true;
                break;
            }
        }

        if(foundFilm = true){
            System.out.println("Film found.");
        }
        else{
            System.out.println("The film name you entered has not been recognised.  Please try again.");
        }
    }

    //Call the function and input the film name input by the user.
    getScheduledShowsByFilm(filmInput);  ////This is the code that seems to be the problem.
    System.out.println("reached bottom");

}

and the second method is:

 public void getScheduledShowsByFilm(String inputFilmName)
{
    ArrayList<Show> scheduledShows;
    scheduledShows = new ArrayList<Show>();
    for(Film film : films){
        if(inputFilmName == film.getFilmName()){
            for(Schedule schedule : schedules){
                scheduledShows.add(schedule.getShowsOfFilm(film));
                if(scheduledShows.get(scheduledShows.size() - 1) == null){
                    scheduledShows.remove(scheduledShows.size() - 1);
                }
            }
        }
    }

    for(Show show : scheduledShows){
        System.out.println("**********************************");
        show.getShowDetails();
        System.out.println("**********************************");
    }
}

The second method works perfectly when I call it on its own and enter parameters manually though.

It's probably something extremely simple that I'm not understanding! haha, thank you for your help :)

Answer 1

foundFilm can never be false because you always assign true to it:

 if(foundFilm = true){
            System.out.println("Film found.");
 }

try changing it to this:

if(foundFilm)
{
   System.out.println("Film found.");
}

Answer 2

In getGetScheduledShowByFilmInput() and getScheduledShowsByFilm(String) avoid doing string comparison using the equality operator (==). The == operator tests for object equality, but you want to test whether two strings contain the same sequence of characters. Therefore, use equals instead:

    //Check to see if the film name input by the user corresponds to any film showing.
    for(Film film : films){
        if(film.getFilmName().equals(filmInput)){
            foundFilm = true;
            break;
        }
    }

and

for(Film film : films){
    if(inputFilmName.equals(film.getFilmName())){
        for(Schedule schedule : schedules){
            scheduledShows.add(schedule.getShowsOfFilm(film));
            if(scheduledShows.get(scheduledShows.size() - 1) == null){
                scheduledShows.remove(scheduledShows.size() - 1);
            }
        }
    }
}