Given the existence of a Phone class. Define a subclass, CameraPhone, that conta

Question

Given the existence of a Phone class.
Define a subclass, CameraPhone, that contains two instance variables: an integer named, imageSize, representing the size in megapixels (for simplicity assume a pixel takes up one byte -- thus megapixels equals megabytes) of each picture (i.e., 2 means each image is composed of 2 megapixels), and an integer named memorySize, representing the number of gigabytes in the camera's memory (i.e., 4 means 4 Gigabyes of memory).

There is a constructor that accepts two integer parameters corresponding to the above two instance variables and which are used to initialize the respective instance variables.

There is also a method named numPictures that returns (as an integer) the number of pictures the camera's memory can hold.

Don't forget that a gigabyte is 1,000 megabytes.

------------------------------------------------------------------------

import java.util.Scanner;
class Phone{
private int ph_ID;
}

///{
//write your code here
//start

//end
///}
  
public class inheritance{

public static void main(String[] arg){
  
Scanner scanner =new Scanner(System.in);
System.out.println("Enter the imagesize:");
int imagesize=scanner.nextInt();
System.out.println("Enter the memorysize:");
int memorysize=scanner.nextInt();
  
CameraPhone cph=new CameraPhone(imagesize,memorysize);
System.out.println("imagesize:"+cph.getImageSize());
System.out.println("memorysize:"+cph.getMemorySize());
System.out.println("numPictures:"+cph.numPictures());
  
}
}

Explanation / Answer

public class CameraPhone extends Phone{

   int imageSize;
   int memorySize;
   CameraPhone(int is, int ms){
       imageSize = is;
       memorySize = ms;
   }
   int getImageSize(){
       return imageSize;
   }
   int getMemorySize(){
       return memorySize;
   }
   int numPictures(){
       int numPictures = memorySize * 1000 / imageSize;
       return numPictures;
   }
}

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