Creating a Classes Application in Java

Problem:

Smartphone

-manufacturer : String -name : String  -screen : Screen  -camera : Camera - battery : Battery) - profit : double

+Smartphone(manufacturer: String ,name: String, screen : Screen , camera :Camera, battery : Battery) + setManufacturer(manufacturer: String ):void  + getManufacturer() : String  + setName(name : String) : void + getName() : String + setOs(os : OS) : void + getOs() : OS + setScreen(screen : Screen) : void  + getScreen() : Screen + setCamera(camera : Camera) : void  + getCamera() : Camera  + setBattery(battery : Battery) : void + getBattery() : Battery + setProfit(profit : double) : void + getProfit() : double + calculateTotalPrice() : double + toString() : String

OS

- name : String - version : double - price : double

+ OS(name : String, version : double) + setName(name : String) : void  + getName() : String + setVersion(version : double) : void + getVersion() : double  + setPrice(price : double) : void  + getPrice() : Double + toString() : String

Screen

- type : String - width : int - height : int - multitouch : boolean - price : double

+ Screen(type : String, width : int, height : int, multitouch : boolean)  + setType(type : String) : void + getType() : String + setWidth(width : int) : void + getWidth() : int + setHeight(height : int) : void + getHeight() : int + setMultiTouch(multitouch : boolean) : void + getMultiTouch() : Boolean + setPrice(price : double) : void + getPrice() : Double + toString() : String

Camera

- megaPixels : double - video : boolean - videoType : String - price : double

+ Camera(megaPixels : double, video : boolean, videoType : String)  + setMegaPixels(megaPixels : double) : void  + getMegaPixels() : double  + setVideo(video : boolean) : void  + getVideo() : boolean + setVideoType(videoType : boolean) : void  + getVideoType() : String + setPrice(price : double) : void + getPrice() : Double + toString() : String

Battery

- standBy : int - talkTime : int - price : double

+ Battery(standBy : int, talkTime : int) + setStandBy(standBy : int) : void + getStandBy() : int + setTalkTime(talkTime : int) : void + getTalkTime() : int + setPrice(price : double) : void + getPrice() : Double + toString() : String

A Smartphone is usually made up from an operating system, a screen, a camera, and a battery. Each of these components are represented in a class of their own. Each of these classes has a number of variables, a constructor, and set/get methods.

The Smartphone class is made up from each of the other classes plus three variables which are the manufacturer, the name, and the profit. You are asked to implement these classes and then write a tester class which will have three smartphones and it will print their information using the toString() method.

The calculateTotalPrice() method will sum up the prices of all other components plus the profit variable and returns the sum as a double.

Printing will be done using the following format: (variables are placed between parantheses)

(manufacturer) (name)

OS: (name) (version)

 Screen: (type) (width)x(height) (Multitouch)

 Camera: (megaPixels)MP (videoType )

Battery: (standBy) Stand By, (talkTime) Talk Time

 Price: (calculateTotalPrice())

Solution:

/**---------------------Smartphone.java-------------------*/
public class Smartphone {
 
 private String  manufacturer;
 private String  name;
 private OS      os;
 private Screen  screen;
 private Camera  camera;
 private Battery battery;
 private double  profit;
 
 public Smartphone(String manufacturer, String name,
            Screen screen, Camera camera, Battery battery) {
  this.manufacturer = manufacturer;
  this.name = name;
  this.screen = screen;
  this.camera = camera;
  this.battery = battery;
 }

 public String getManufacturer() {
  return manufacturer;
 }

 public void setManufacturer(String manufacturer) {
  this.manufacturer = manufacturer;
 }

 public String getName() {
  return name;
 }

 public void setName(String name) {
  this.name = name;
 }

 public OS getOs() {
  return os;
 }

 public void setOs(OS os) {
  this.os = os;
 }

 public Screen getScreen() {
  return screen;
 }

 public void setScreen(Screen screen) {
  this.screen = screen;
 }

 public Camera getCamera() {
  return camera;
 }

 public void setCamera(Camera camera) {
  this.camera = camera;
 }

 public Battery getBattery() {
  return battery;
 }

 public void setBattery(Battery battery) {
  this.battery = battery;
 }

 public double getProfit() {
  return profit;
 }

 public void setProfit(double profit) {
  this.profit = profit;
 }
 
 public double calculateTotalPrice() {
  return profit + os.getPrice() + 
        screen.getPrice() + camera.getPrice() + 
                                 battery.getPrice();
 }
 
 public String toString() {
  return manufacturer+" "+name+"\n" +
               os + screen + camera + battery + "Price: " 
                           + calculateTotalPrice() + "\n";
 }
}
/**---------------------OS.java-------------------*/
public class OS {
 
 private String name;
 private double version;
 private double price;
 
 public OS(String name, double version) {
  this.name = name;
  this.version = version;
 }

 public String getName() {
  return name;
 }

 public void setName(String name) {
  this.name = name;
 }

 public double getVersion() {
  return version;
 }

 public void setVersion(double version) {
  this.version = version;
 }

 public double getPrice() {
  return price;
 }

 public void setPrice(double price) {
  this.price = price;
 }
 
 public String toString() {
  return "OS: "+name+" "+version+"\n";
 }
}
/**---------------------Screen.java-------------------*/
public class Screen {
 
 private String  type;
 private int     width;
 private int     height;
 private boolean multiTouch;
 private double  price;
 
 public Screen(String type, int width, int height, 
                                      boolean multiTouch) {
  this.type       = type;
  this.width      = width;
  this.height     = height;
  this.multiTouch = multiTouch;
 }

 public String getType() {
  return type;
 }

 public void setType(String type) {
  this.type = type;
 }

 public int getWidth() {
  return width;
 }

 public void setWidth(int width) {
  this.width = width;
 }

 public int getHeight() {
  return height;
 }

 public void setHeight(int height) {
  this.height = height;
 }

 public boolean isMultiTouch() {
  return multiTouch;
 }

 public void setMultiTouch(boolean multiTouch) {
  this.multiTouch = multiTouch;
 }

 public double getPrice() {
  return price;
 }

 public void setPrice(double price) {
  this.price = price;
 }
 
 public String toString() {
  if (multiTouch)
   return "Screen: "+type+" "+
                      width+"x"+height+" Multitouch\n";

  return "Screen: "+type+" "+width+"x"+height+"\n";
 }
}
/**---------------------Camera.java-------------------*/
public class Camera {
 
 private double  medaPixels;
 private boolean video;
 private String  videoType;
 private double  price;

 public Camera(double medaPixels, boolean video, 
                                       String videoType) {
  this.medaPixels = medaPixels;
  this.video      = video;
  this.videoType  = videoType;
 }

 public double getMedaPixels() {
  return medaPixels;
 }

 public void setMedaPixels(double medaPixels) {
  this.medaPixels = medaPixels;
 }

 public boolean isVideo() {
  return video;
 }

 public void setVideo(boolean video) {
  this.video = video;
 }

 public String getVideoType() {
  return videoType;
 }

 public void setVideoType(String videoType) {
  this.videoType = videoType;
 }

 public double getPrice() {
  return price;
 }

 public void setPrice(double price) {
  this.price = price;
 }
 
 public String toString() {
  if (video)
   return "Camera: "+medaPixels
                                +"MP "+videoType+"\n";
  
  return "Camera: "+medaPixels+"MP\n"; 
 }
}
/**---------------------Battery.java-------------------*/
public class Battery {

 private int    standBy;
 private int    talkTime;
 private double price;
 
 public Battery(int standBy, int talkTime) {
  this.standBy  = standBy;
  this.talkTime = talkTime;
 }

 public int getStandBy() {
  return standBy;
 }

 public void setStandBy(int standBy) {
  this.standBy = standBy;
 }

 public int getTalkTime() {
  return talkTime;
 }

 public void setTalkTime(int talkTime) {
  this.talkTime = talkTime;
 }

 public double getPrice() {
  return price;
 }

 public void setPrice(double price) {
  this.price = price;
 }
 
 public String toString() {
  return "Battery: "+standBy+
               " Stand By, "+talkTime+" Talk Time\n";
 }
}

/**----------------Tester.java---------------*/
public class Tester {

 public static void main(String[] args) {
  
 Battery battery1 = new Battery(10, 7);
 Camera  camera1  = new Camera(8.0, true, "1080p");
 Screen  screen1  = new Screen("Super AMOLED", 200, 300, true);
 OS      os1      = new OS("Android", 4.1);
  
 battery1.setPrice(20.0);
 camera1.setPrice(100.0);
 screen1.setPrice(200.0);
 os1.setPrice(0.0);
  
 Smartphone sp1 = new Smartphone("Samsung", "Galaxy S3", 
                                              screen1, camera1, battery1);
  
 sp1.setOs(os1);
 sp1.setProfit(200.0);
  
 Battery battery2 = new Battery(7, 4);
 Camera  camera2  = new Camera(5.0, true, "720p");
 Screen  screen2  = new Screen("Retina Display", 150, 250, true);
 OS      os2      = new OS("IOS", 5.0);
  
 battery2.setPrice(50.0);
 camera2.setPrice(100.0);
 screen2.setPrice(300.0);
 os2.setPrice(100.0);
  
 Smartphone sp2 = new Smartphone("Apple", "iPhone", 
                                           screen2, camera2, battery2);
  
 sp2.setOs(os2);
 sp2.setProfit(300.0);
  
 Battery battery3 = new Battery(10, 7);
 Camera  camera3  = new Camera(11.0, true, "1080p");
 Screen  screen3  = new Screen("HD 1080p", 200, 300, true);
 OS      os3      = new OS("Windows Mobile", 7.1);
  
 battery3.setPrice(20.0);
 camera3.setPrice(100.0);
 screen3.setPrice(200.0);
  os3.setPrice(0.0);
  
 Smartphone sp3 = new Smartphone("Nokia", "Lumia", 
                                              screen3, camera3, battery3);
  
 sp3.setOs(os3);
 sp3.setProfit(250.0);
 
 System.out.println(sp1);
 System.out.println(sp2);
 System.out.println(sp3);
 }
}