872: Mainline

An instance of the new Poster class, defined in Segment 870 is put to use in the following revision of the applet defined previously in Segment 856:

import javax.swing.*;
import java.awt.event.*;
import java.util.*;
public class MovieApplication extends JApplet {
 // Declare instance variables:
 private Meter meter;
 private JList jList;
 private Poster poster;                                           
 private Movie movie;
 private MovieData movieData;
 // Define constructor
 public MovieApplication() {
  // Create models
  getMovie();
  getMovieData();
  // Create and connect views to application
  getContentPane().add("West", getMeter());
  getContentPane().add("East", new JScrollPane(getJList()));
  getContentPane().add("Center", getPoster());                    
 }
 // Define getters and setters
 public Meter getMeter () {
  if (meter == null) {setMeter(new Meter(0, 30));}
  return meter;
 }
 public JList getJList () {
  if (jList == null) {setJList(new JList());}
  return jList;
 }
 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 Poster getPoster () {                                     
  if (poster == null) {setPoster(new Poster());}                  
  return poster;                                                  
 }                                                                
 public void setMeter (Meter m) {
  meter = m;
 }
 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;
  movieData.addObserver(new MovieDataObserver(this));
  movieData.changed();
 }
 public void setJList (JList j) {
  jList = j;
  jList.addListSelectionListener(new MovieListListener(this));
 }
 public void setPoster (Poster p) {                               
  poster = p;                                                     
 }                                                                
}