A collection of Interfaces that define Behavior

Interfaces have many uses - (1) to prescribe certain behaviors, (2) to commonly identify all classes that implement an interface, (3) to act as a functional interface that can be passed as a parameter.

In the next lesson, we will explore use #3. But we will use interfaces for the first two purposes in this assignment.

You will be building an application that combines different media collections from old style TV shows. Each TV show's collection will only be of one specific file type. You will build a class specific to each media collection. Each class will have an instance variable of type Sting called filename plus instance variables for the clip's metadata.

Media Collection (Class)	Metadata	Type of Media
DarkShadowsClip	episode, speaker	.wav
SeinfeldClip	speaker, year	.wav
RockyAndBullwinkleClip	speakers	.wav
GameOfThronesClip	character	.gif (animated)
DarkClip	scene	.gif (animated)

Here are the clips you will build an instance of:

filename	Media Collection	Properties
Dark-Jonas.gif	DarkClip	scene = Jonas Walking Into Cave
Dark-TheStranger.gif	DarkClip	scene = Stranger Leaving Cave
DarkShadows-Angelique.wav	DarkShadowsClip	speaker = Angelique, episode=606
DarkShadows-DoctorHoffman.wav	DarkShadowsClip	speaker = Doctor Hoffman, episode=613
DarkShadows-ProfessorStokes.wav	DarkShadowsClip	speaker = Professor Stokes, episode=506
DarkShadows-Zombie.wav	DarkShadowsClip	speaker = Zombie Sheriff Davenport, episode=942
GameOfThrones-Joffrey.gif	GameOfThronesClip	character = Joffrey Baratheon
GameOfThrones-Jon.gif	GameOfThronesClip	character = Jon Snow
RockyAndBullwinkle-Natasha.wav	RockyAndBullwinkleClip	speakers = [Natasha]
RockyAndBullwinkle-RockyAndBullwinkle.wav	RockyAndBullwinkleClip	speakers = [Rocky, Bullwinkle]
Seinfeld-Jerry.wav	SeinfeldClip	speaker = Jerry, year = 1997
Seinfeld-Kramer.wav	SeinfeldClip	speaker = Kramer, year = 1993

You will create all twelve instances of various clips and place them into an ArrayList. You will not use superclasses; rather you will use interfaces. The interfaces should define the play method according to the current types of media. At the moment, there are only collections of animated gifs and wav files, but you want to make sure that your ArrayList could cover other media forms, such as mp3 files or mp4 files in the future.

Here is the code you will need to use to play wav files:

System.out.println("Playing " + filename); AudioInputStream audioStream; try { Clip clip = AudioSystem.getClip(); clip.open(AudioSystem.getAudioInputStream(new File(filename))); clip.start(); Thread.sleep(clip.getMicrosecondLength() / 1000); clip.close(); } catch (Exception e) { e.printStackTrace(); } 

And here is the code you will need to play animated gifs (using Java Swing)

System.out.println("Playing " + filename); JFrame frame = new JFrame(); ImageIcon icon = new ImageIcon(filename); JLabel label = new JLabel(icon); frame.add(label); frame.pack(); frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); frame.setLocation(filename.length()* 10, filename.length() * 10); frame.setVisible(true);

Your driver will build the various twelve media clips in the table above, add them to an ArrayList, then iterate through the ArrayList and play each one.