BOOK FAIR PROGRAM

import java.io.*;
class bookfair
{
    //instance variables
    String bname;
    double p;
    double np;
  bookfair()
  {
      bname="";
      p=0.00f;
      np=0.00f;
 
  }
  void input() throws IOException
  {
      BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
      System.out.println("enter the book name");
      bname=br.readLine();
      System.out.println("enter the price");
      p=Double.parseDouble(br.readLine());
    
  }
   void calculate()
   {
    if(p<=1000)
    {
    np=p-(p*0.2);
}
    else if(p>1000 && p<=3000)
  {
    np=p-(p*0.1);
}
    else
{
    np=p-(p*0.15);
   
    }
}

void display()
{
   System.out.println("book name\t"+"price\t"+"net peice\t");
   System.out.println(bname+"\t"+p+"\t"+np);

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