852: Mainline

Adding an instance of the new MovieData model class produces the following modification of the applet defined in Segment 797.

import javax.swing.*;
import java.awt.event.*;
import java.util.*;
public class MovieApplication extends JApplet {
 // Declare instance variables:
 private Meter meter;
 private Movie movie;
 private MovieData movieData;                                   
 // Define constructor
 public MovieApplication() {
  // Create models
  getMovie();
  getMovieData();
  // Create and connect view to application
  getContentPane().add("Center", getMeter());
 }
 // Define getters and setters
 public Meter getMeter () {
  if (meter == null) {setMeter(new Meter(0, 30));}
  return meter;
 }
 public Movie getMovie () {
  if(movie == null) {setMovie(new Movie (10, 10, 10, "On to Java"));}
  return movie;
 }
 public MovieData getMovieData () {                             
  if(movieData == null) {setMovieData(new MovieData ());}       
  return movieData;                                             
 }                                                              
 public void setMeter (Meter m) {
  meter = m;
  meter.addMouseListener(new MeterListener(this));
 }
 public void setMovie (Movie m) {
  if(movie == m) {return;}
  if(movie instanceof Movie) {movie.deleteObservers();}
  if(m instanceof Movie) {
   movie = m;
   movie.addObserver(new MovieObserver(this));
   movie.changed();
  }
 }
 public void setMovieData (MovieData m) {                       
  movieData = m;                                                
 }                                                              
}