Billing System Java Program

Java Program Billing System According to Units Using `util` Package

import java.util.Scanner;
    class HESCOBill{
        public static void main(String[]args) throws Exception{
            Scanner s = new Scanner(System.in);
            System.out.print(" Enter Units ");
                String bill = s.nextLine();
                int units = Integer.parseInt(bill);
            if( units >= 1 && units <=100 )
                System.out.print("Your bill is " + units * 2 );
            if( units > 100 && units <=200 )
                System.out.print("Your bill is " + units * 4 );
            if( units > 200 && units <= 300 )
                System.out.print("Your bill is " + units * 6 );
            if( units > 300 && units <= 400 )
                System.out.print("Your bill is " + units * 8 );
            if( units > 400 )
                System.out.print("Your bill is " + units * 10 );
        }
    }