Question

Here is a program

public class MovieTitle {
    public static void main(String[] args) {
        Movie one = new Movie();
        one.title = "I am title";
        one.playIt();
        System.out.println(one.title);
    }
}

class Movie {
    String title;
    void playIt() {
        this.title = "I am title of movie";
    }
}

The output is “I am title of movie”
I am trying to understand it but till now I do not understand it properly.
I want to know: Why does it not print “I am title”

Answer 1

Sequence of events:

// create a new Movie called "one"
Movie one = new Movie();

// at this point, one.title is still null

// set the title to "I am title"
one.title = "I am title";

// call playIt, which in turn ...
one.playIt();
   // sets the title to something else again
   => this.title = "I am title of movie";

If you printed the title before calling playIt, it would still show as “I am title”.