electricity_bill.java

import java.util.*;
class ebill
 {
    public static void main (String args[])
    {
    customerdata ob  = new customerdata();
    ob.getdata();
    ob.calc();
    ob.display();
   }
  }
class customerdata
  {
    Scanner in = new Scanner(System.in);
    Scanner ins = new Scanner(System.in);
    String cname,type;
    int bn;
    double current,previous,tbill,units;
    void getdata()
    {
    System.out.print ("\n\t Enter consumer number  ");
    bn = in.nextInt();
    System.out.print ("\n\t Enter Type of connection  (D for Domestic or C for Commercial) ");
    type = ins.nextLine();
    System.out.print ("\n\t Enter consumer name  ");
    cname = ins.nextLine();
    System.out.print ("\n\t Enter previous month reading  ");
    previous= in.nextDouble();
    System.out.print ("\n\t Enter current month reading  ");
    current= in.nextDouble();
  }
    void calc()
    {
    units=current-previous;
    if(type.equals("D"))
    {
        if (units<=100)
        tbill=1 * units;
        else if (units>100 && units<=200)
        tbill=2.50*units;
        else if(units>200 && units<=500)
        tbill= 4*units;
        else
        tbill= 6*units;
    }
    else 
    {
        if (units<=100)
        tbill= 2 * units;
        else if(units>100 && units<=200)
        tbill=4.50*units;
        else if(units>200 && units<=500)    
        tbill= 6*units;
        else
        tbill= 7*units;
    }
  }   
    void display()
    {
        System.out.println("\n\t Consumer number = "+bn);
        System.out.println ("\n\t Consumer name = "+cname);
        if(type.equals("D"))
        System.out.println ("\n\t type of connection  = DOMESTIC ");
        else
        System.out.println ("\n\t type of connection  = COMMERCIAL ");
        System.out.println ("\n\t Current Month  Reading = "+current);
        System.out.println ("\n\t Previous Month  Reading = "+previous);
        System.out.println ("\n\t Total units = "+units);
        System.out.println ("\n\t Total bill = RS "+tbill);
  }
}