Java Program to calculate the Library Fine and display in a nice format

import java.io.*;
public class Library{
    int acc_num,edays,fine;
    String author, title;
    BufferedReader buff=new BufferedReader(new InputStreamReader(System.in));
    public void input()throws IOException{
        System.out.println("Enter the Accssion Number:- ");
        acc_num=Integer.parseInt(buff.readLine());
        System.out.println("Enter the Author Name:- ");
        author=buff.readLine();
        System.out.println("Enter the Title of the Book:- ");
        title=buff.readLine();
        System.out.println("Enter the Extra Days:- ");
        edays=Integer.parseInt(buff.readLine());
    }

    public void compute(){
        fine=edays*2;
    }

    public void display(){
        System.out.print("Acc. No.\tTitle\t\tAuthor\t\tFine");
        System.out.print("\n"+acc_num+"\t\t"+title+"\t\t"+author+"\t\t"+fine);
    }

    public static void main(String[] args)throws IOException{
        Library obj=new Library();
        obj.input();
        obj.compute();
        obj.display();
    }
}