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Class & Object - Library Program - Java Programs

Define a class called Library with the following description:

Instance variables/data members:
int accNum: stores the accession number of the book.
String title: stores the title of the book.
String auhor: stores the name of the author.

Member functions:
(i) void input(): to accept and store the accession number, title and author.
(ii) void compute(): to accept the number of days late, calculate and display the fine charged at the rate of Rs. 2 per day.
(iii) void display(): to display the details in the following format:
Accession Number Title Author

Write a main() method to create an object of the class and call the above member functions.

Java


import java.util.Scanner;
class Library{
    int accNum;
    String title;
    String author;
    public void input(){
        Scanner in = new Scanner(System.in);
        System.out.print("Accession number: ");
        accNum = Integer.parseInt(in.nextLine());
        System.out.print("Title: ");
        title = in.nextLine();
        System.out.print("Author: ");
        author = in.nextLine();
    }
    public void compute(){
        Scanner in = new Scanner(System.in);
        System.out.print("Number of days late: ");
        int d = Integer.parseInt(in.nextLine());
        double fine = d * 2;
        System.out.println("Fine: Rs. " + fine);
    }
    public void display(){
        System.out.println("Accession Number Title\tAuthor");
        System.out.println(accNum + "\t" + title + "\t" + author);
    }
    public static void main(String args[]){
        Library obj = new Library();
        obj.input();
        obj.compute();
        obj.display();
    }
}

Output

 
 OUTPUT : 
Accession number: 1001
Title: Programming in Java
Author: Daniel Y Ling
Number of days late: 5
Fine: Rs. 10.0
Accession Number                  Title                    Author
    1001                     Programming in Java    Daniel Y Laing