Java program to calculate electricity using the static method

import java.util.*; 

class ComputeElectricityBill 

{ 

        public static void main(String args[]) 

        {   

	   long units; 

	   Scanner sc=new Scanner(System.in);

 

	   System.out.println("enter number of units");

	   

           units=sc.nextLong();

 

     	   double billpay=0;

 

           if(units<100)

		billpay=units*1.20;

 

    	    else if(units<300)

		billpay=100*1.20+(units-100)*2;

 

	    else if(units>300)

		billpay=100*1.20+200 *2+(units-300)*3;

 

              System.out.println("Bill to pay : " + billpay); 

   } 

}