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Disk -title: String -playTime: int // in minutes + Disk(title: String, playTime: int) + get Title(): String + getPlay Time(): int +toString(): String A Audio Video artist: String - director: String - tracksList: java.util.ArrayList - description: String + Audio(artist: String, title: String. play Time: int) +getArtitst(): String + getTracksList() + Video(director: String, description: String, title: String, play Time: int) + getDirector(): String +getDescription(): String + toString(): String + addTrack(name: String); void +removeTrack(name: String): void +toString(): String A. Disk class is characterized by a String attributes title and an integer playTime. This class has: A constructor that initializes all the attributes. • The getter and setter methods for the attributes. • A toString() method that returns each data field at a line in the form: "Title: " + title + "\nPlay time: " + playTime; B. Audio class inherits the class Disk. It has a String artist and an array list tracksList. This class has: • A constructor that initializes all attributes in which tracks List attribute has to be created. The getter methods and setters for the attributes.. • addTrack method that takes as parameter the name of the track to be added to the array. • remove Track method that takes as parameter the name of the track to be deleted from the array. • A toString() method that overrides the toString() method in the Disk class by adding the data fields of the Audio class in the same form.

Disk -title: String -playTime: int // in minutes + Disk(title: String, playTime: int) + get Title(): String + getPlay Time(): int +toString(): String A Audio Video artist: String - director: String - tracksList: java.util.ArrayList - description: String + Audio(artist: String, title: String. play Time: int) +getArtitst(): String + getTracksList() + Video(director: String, description: String, title: String, play Time: int) + getDirector(): String +getDescription(): String + toString(): String + addTrack(name: String); void +removeTrack(name: String): void +toString(): String A. Disk class is characterized by a String attributes title and an integer playTime. This class has: A constructor that initializes all the attributes. • The getter and setter methods for the attributes. • A toString() method that returns each data field at a line in the form: "Title: " + title + "\nPlay time: " + playTime; B. Audio class inherits the class Disk. It has a String artist and an array list tracksList. This class has: • A constructor that initializes all attributes in which tracks List attribute has to be created. The getter methods and setters for the attributes.. • addTrack method that takes as parameter the name of the track to be added to the array. • remove Track method that takes as parameter the name of the track to be deleted from the array. • A toString() method that overrides the toString() method in the Disk class by adding the data fields of the Audio class in the same form.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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1- Based on the UML shown below, Implement in Java the following inheritance hierarchy (the classes' description comes next): Disk title: String playTime: int // in minutes + Disk(title: String, playTime: int) + getTitle(): String + getPlayTime(): int + toString(): String Audio Video -artist: String director: String - tracksList: java.util.ArrayList - description: String + Video(director: String, description: + Audio(artist: String, title: String, playTime: int) String, title: String, playTime: int) + getArtitst(): String + getDirector(): String + getTracksList() + getDescription(): String + addTrack(name: String): void + toString(): String + removeTrack(name: String): void toString(): String A. Disk class is characterized by a String attributes title and an integer playTime. This class has: A constructor that initializes all the attributes. The getter and setter methods for the attributes. A toString() method that returns each data field at a line in the form: "Title: " + title + "\nPlay time: " + playTime; B. Audio class inherits the class Disk. It has a String artist and an array list tracksList. This class has: A constructor that initializes all attributes in which tracks List attribute has to be created. The getter methods and setters for the attributes.. addTrack method that takes as parameter the name of the track to be added to the array. ● removeTrack method that takes as parameter the name of the track to be deleted from the array. A toString() method that overrides the toString() method in the Disk class by adding the data fields of the Audio class in the same form. C. Video class inherits the class Disk. It has as attributes two Strings director and description. This class has: A constructor that initializes all attributes. A toString() method that overrides the toString() method in the Disk class by adding the data fields of the Video class in the same form.
Transcribed Image Text:1- Based on the UML shown below, Implement in Java the following inheritance hierarchy (the classes' description comes next): Disk title: String playTime: int // in minutes + Disk(title: String, playTime: int) + getTitle(): String + getPlayTime(): int + toString(): String Audio Video -artist: String director: String - tracksList: java.util.ArrayList - description: String + Video(director: String, description: + Audio(artist: String, title: String, playTime: int) String, title: String, playTime: int) + getArtitst(): String + getDirector(): String + getTracksList() + getDescription(): String + addTrack(name: String): void + toString(): String + removeTrack(name: String): void toString(): String A. Disk class is characterized by a String attributes title and an integer playTime. This class has: A constructor that initializes all the attributes. The getter and setter methods for the attributes. A toString() method that returns each data field at a line in the form: "Title: " + title + "\nPlay time: " + playTime; B. Audio class inherits the class Disk. It has a String artist and an array list tracksList. This class has: A constructor that initializes all attributes in which tracks List attribute has to be created. The getter methods and setters for the attributes.. addTrack method that takes as parameter the name of the track to be added to the array. ● removeTrack method that takes as parameter the name of the track to be deleted from the array. A toString() method that overrides the toString() method in the Disk class by adding the data fields of the Audio class in the same form. C. Video class inherits the class Disk. It has as attributes two Strings director and description. This class has: A constructor that initializes all attributes. A toString() method that overrides the toString() method in the Disk class by adding the data fields of the Video class in the same form.
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