Question

A University Library has many items available for its students; some can be checked out and others cannot. Among those that can be checked out are journal (i.e., a literary journal) and digital video disk (i.e., a DVD). These two types have many attributes in common such as title, publisher, and dewey decimal classification. Design a class to represent the library item that would capture the common features among journals and DVDs. Then, design journal and digital video classes that are derived from the library item base class. If you feel confident enough to draw a UML class diagram depicting the classes, then feel free to do so. Otherwise, you can submit something like the following for each class The library item class does not need more attributes, but you should add at least 2 methods to the class. The journal and digital video classes should have at least 3 attributes and at least 2 methods.

The library item class does not need more attributes (you can use the ones provided, if you like), but you should add at least 2 methods to the class. The journal and digital video classes should have at least 3 attributes and at least 2 methods.

If you feel confident enough to draw a UML class diagram depicting the classes, then feel free to do so.

Deliverable

1) Implement your UML diagram into Java code for all 3 classes.

2) Create a driver class to test that your class design works. (Upload all 3 class files along with your driver class)

Answer 1

Deliverable

1) Implement your UML diagram into Java code for all 3 classes.

Content of the Library.java file

import java.util.Scanner;
public class Library
{
   String title,publisher;
   int DDC;
   void setInfo()
   {
       Scanner sc= new Scanner(System.in);
       System.out.print("Enter the title of the item: ");
       title= sc.nextLine();
       System.out.print("Enter the publisher of the item: ");
       publisher= sc.nextLine();
       System.out.print("Enter the DDC of the item: ");
       DDC= sc.nextInt();   
   }
   void display()
   {
       System.out.println("The title of the item is" + title);  
       System.out.println("The publisher of the item is" + publisher);  
       System.out.println("The DDC of the item is" + DDC);  
   }
}

Content of the Journal.java file

import java.util.Scanner;
public class Journal extends Library
{
   int cost,volume,issue;
   void setInfo()
   {
       super.setInfo();
       Scanner sc= new Scanner(System.in);
       System.out.print("Enter the cost of the journal: ");
       cost= sc.nextInt();
       System.out.print("Enter the volume of the journal: ");
       volume= sc.nextInt();
       System.out.print("Enter the issue of the journal: ");
       issue= sc.nextInt();   
   }
   void display()
   {
       super.display();
       System.out.println("The cost of the journal is" + cost);  
       System.out.println("The volume of the journal is" + volume);  
       System.out.println("The issue of the journal is" + issue);  
   }
}

Content of the DigVideo.java file

import java.util.Scanner;
public class DigVideo extends Library
{
   int cost,size,issue;
   void setInfo()
   {
       super.setInfo();
       Scanner sc= new Scanner(System.in);
       System.out.print("Enter the cost of the digital video: ");
       cost= sc.nextInt();
       System.out.print("Enter the size of the digital video: ");
       size= sc.nextInt();
       System.out.print("Enter the length of the digital video: ");
       issue= sc.nextInt();   
   }
   void display()
   {
       super.display();
       System.out.println("The cost of the digital video is" + cost);  
       System.out.println("The size of the digital video is" + size);  
       System.out.println("The length of the digital video is" + issue);  
   }
}

Deliverable

2) Create a driver class to test that your class design works. (Upload all 3 class files along with your driver class)

Content of the Driver.java file

class Driver
{
   public static void main(String args[])
   {
       Journal j= new Journal();
       DigVideo d = new DigVideo();
       System.out.println("Information of Journal Item");
       j.setInfo();
       System.out.println();
       System.out.println();
       System.out.println("Information of Digital Video Item");
       d.setInfo();
       System.out.println("\n\n Entered intormation of the Journal is ");
       j.display();
       System.out.println("\n\n Entered intormation of the Digital Video is ");
d.display();
   }
}

*Note

The solution contains content of four files. Keep all thee file in same directory. use the following command to execute the code.

>>>javac Library.java

>>>javac Journal.java

>>>javac DigVideo.java

>>>javac Driver.java

>>>java Driver

Sample Input and Output: