Converting a String to Double

MAIN.JAVA:

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws ParseException {
        SimpleDateFormat dk = new SimpleDateFormat("dd/MM/yyyy");
        Scanner sc = new Scanner(System.in);
        BillHeader b = new BillHeader();
        System.out.println("Enter the issue date as dd/MM/yyyy");
        String d1 = sc.nextLine();
        Date di = dk.parse(d1);
        b.setIssueDate(di);
        System.out.println("Enter the due date as dd/MM/yyyy");
        String d2 = sc.nextLine();
        Date df = new SimpleDateFormat("dd/MM/yyyy").parse(d2);
        b.setDueDate(df);
        System.out.println("Enter the original amount");
        String orig = sc.next();
        System.out.println("Enter amount paid so far");
        String paid = sc.next();
        double o= Double.parseDouble(orig);
        double p = Double.parseDouble(paid);
        b.setOriginalAmount(o);
        b.setAmountOutstanding(p);
        double bal = o-p;
        b.setAmountOutstanding(bal);
        b.display();


    }
}

BILLHEADER.JAVA:

import java.text.SimpleDateFormat;
import java.util.Date;

public class BillHeader {
    private Date issueDate;
    private Date dueDate;
    private double originalAmount;
    private double amountOutstanding;
    SimpleDateFormat dk = new SimpleDateFormat("dd/MM/yyyy");

    public Date getIssueDate() {
        return issueDate;
    }

    public void setIssueDate(Date issueDate) {
        this.issueDate = issueDate;
    }

    public Date getDueDate() {
        return dueDate;
    }

    public void setDueDate(Date dueDate) {
        this.dueDate = dueDate;
    }

    public double getOriginalAmount() {
        return originalAmount;
    }

    public void setOriginalAmount(double originalAmount) {
        this.originalAmount = originalAmount;
    }

    public double getAmountOutstanding() {
        return amountOutstanding;
    }

    public void setAmountOutstanding(double amountOutstanding) {
        this.amountOutstanding = amountOutstanding;
    }

    public void display(){
        System.out.println("Issue date: "+dk.format(getIssueDate()));
        System.out.println("Due Date: "+dk.format(getDueDate()));
        System.out.println("Original amount Rs."+originalAmount);
        System.out.println("Amount outstanding Rs."+amountOutstanding);
    }
}