EB Bill Calculator

Program Code:

public class EBBill {
    int consumerNo;
    String consumerName;
    double previousMonthlyReading;
    double currentMonthReading;
    String typeOfConnection;
    double currentMonthUsage;
    double billAmount;
    
    EBBill(int consumerNo,String consumerName,double previousMonthlyReading,double currentMonthReading,String typeOfConnection){
        this.consumerName=consumerName;
        this.consumerNo=consumerNo;
        this.previousMonthlyReading = previousMonthlyReading;
        this.currentMonthReading=currentMonthReading;
        this.typeOfConnection=typeOfConnection;
			
        currentMonthUsage = currentMonthReading - previousMonthlyReading;
    }
    
    public void computeBill(){
        switch (typeOfConnection) {
            case "C":
			case "c":
                billAmount=computeCommercial();
                break;
            case "D":
			case "d":	
                billAmount= computeDomestic();
                break;
            default:
                break;
        }
    }
     
      private double computeDomestic() {
        if(currentMonthUsage <=100 ){
            return 1 * currentMonthUsage;
        }else if(currentMonthUsage <=200){
            return 2.50 * currentMonthUsage;
        }else if(currentMonthUsage <=500){
            return 4* currentMonthUsage;
        }else{
            return 6*currentMonthUsage;
        }
    }

    private double computeCommercial() {
        if(currentMonthUsage <=100 ){
            return 2 * currentMonthUsage;
        }else if(currentMonthUsage <=200){
            return 4.50 * currentMonthUsage;
        }else if(currentMonthUsage <=500){
            return 6* currentMonthUsage;
        }else{
            return 7*currentMonthUsage;
        }
    }
      
    public static void main(String[] args) {
        if(args.length!=5){
            System.out.println("There is no/ missing arguments to program.. \n Please Run the program as follows");
			System.out.println("java EBBill consumerNo consumerName PrevMonthReading CurMonthReading C/D");
        }else{
            EBBill ebBill=new EBBill(Integer.parseInt(args[0]),args[1],Double.parseDouble(args[2]),Double.parseDouble(args[3]),args[4]);
            ebBill.computeBill();
	    System.out.println("EB Bill");
            System.out.println("*******");
            System.out.println("Consumer Number        :"+ebBill.consumerNo);
            System.out.println("Consumer Name          :"+ebBill.consumerName);
            System.out.println("Previous Month Reading :"+ebBill.previousMonthlyReading);
            System.out.println("Current Month Reading  :"+ebBill.currentMonthReading);
            System.out.println("Connection Type        :"+ebBill.typeOfConnection);
            System.out.println("Amount to be paid      :"+ebBill.billAmount);
        }
    } 
}

Program Execution: